Почему rgb а не ryb

Отличие RGB от RYB

Почему RGB настолько сильно отличается от RYB? Например, в RGB комплементарным цветом для красного будет голубой, а в RYB — зелёный.
Я понимаю, что цвета образовываются по-разному (в мониторах — сочетание зеленого и красного даёт жёлтый, а на бумаге зелёный получают смешиванием жёлтого и синего).
Но как это влияет на комплементарность и сочетание цветов? Какую схему лучше использовать при работе?

Лучший ответ

Для экрана используйте RGB, для печати — CMYK. но сначала усвойте чем принципиально отличаются субтрактивная и аддитивная схемы, тогда станет понятно что RYB в общем-то не нужна.

Остальные ответы

На сколько мне известно, цветовая модель RYB является предшественником современным моделям (RGB/CMYK).
Более правильным считаю использовать современные модели, в которых смешивание комплементарных цветов дают ахроматичные цвета.

попробуй навозом смазать, МБ что-то толковое получится

Похожие вопросы

Why rgb and not cmy? [closed]

Seeing as how the three primary colors are cyan, magenta and yellow (CMY), why do monitors and almost all the GUI components out there use red, green and blue (RGB)? (If I’m not mistaken, printers use the CMYK model.) Is there a historical, hardware/software, or other reason for it?

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Jun 30, 2011 at 8:58
Jun 30, 2011 at 9:15

With many common paints, mixing yellow and blue will yield green, but that’s a characteristic of the particular paints in question. The fact that red, yellow, and blue are taught as primary colors is simply a consequence of how many common paints happen to behave. Even without any chemical reactions, it would be possible to have a paint which looked blue, and a paint which looked yellow, to appear as a medium-dark red when mixed. For example.

Jan 13, 2013 at 0:52

. if the «blue» paint contains a relatively sparse suspension of blue particles in a magenta dye, and the «yellow» paint contains a dense suspension of yellow particles in a yellow dye, a mixture of the two would absorb all blue light (because of the yellow dye) and all green light (because of the magenta dye). The blue particles wouldn’t reflect anything of what was left, but the yellow particles would reflect the red light, thus causing the paint to appear red.

Jan 13, 2013 at 0:55

5 Answers 5

With additive colors, the more you add, the brighter the colors become. This is because they are emitting light. This is why the day light is (more or less) white, since the Sun is emitting in almost all the visible wavelength spectrum.

On the other hand, with subtractive colors the more colors you mix, the darker the resulting color. This is because they are reflecting light. This is also why the black colors get hotter quickly, because it absorbs (almost) all light energy and reflects (almost) none.

Specifically to your question, it depends what medium you are working on. Traditionally, additive colors (RGB) are used because the canon for computer graphics was the computer monitor, and since it’s emitting light, it makes sense to use the same structure for the graphic card (the colors are shown without conversions). However, if you are used to graphic arts and press, subtractive color model is used (CMYK). In programs such as Photoshop, you can choose to work in CMYK space although it doesn’t matter what color model you use: the primary colors of one group are the secondary colors of the second one and viceversa.

P.D.: my father worked at graphic arts, this is why i know this. 😛

Почему гамма RGB, а не RYB?

Я художник. Очень давно рисую красками. Недавно сел за компьютер, а на мониторе есть надпись RGB. Если я верно понял, это три основных цвета. Но мы же все знаем, что зелёный не основной. Верно? Жёлтый где, я не понял? Разве не жёлтый с синим зарождают зелёный? Просто объясните почему именно так в компьютерах?
Второй вопрос. Можно ли сказать, что я вижу мир в три основных цвета? Но не Красный, Синий, Жёлтый, а RGB?
Типа я вижу мир в RGB. Это правильное предложение? Или все же мы видим три основных цвета (Красный, Синий, Жёлтый), а остальные цвета всего лишь оттенки и тд?

Дополнен 3 года назад

Мы же все знаем цветовое колесо, где три основных цвета это красный, синий и жёлтый? Не, не? Чего в графике зелёный выперся? Где он взялся в основных то? Куда пропал жёлтый?

Голосование за лучший ответ

Why use RGB instead of RYB?

Why use RGB instead of RYB? RGB (red, green, blue) and RYB (red, yellow, blue) are two different color models used in art and design. RGB is the standard model used for digital displays and imaging, while RYB is a historical model used in traditional paint mixing. There are several key reasons why RGB tends to be preferred over RYB in most modern applications:

RGB is the native color model of digital devices. Pixels on digital screens emit red, green, and blue light to create all the colors we see. Image sensors also capture color in RGB. Using RGB ensures accurate color representation when creating, editing, and displaying digital images and media. RYB can introduce inaccuracies when converting to/from RGB.

RGB aligns with modern color science. The RGB model is based on the trichromatic theory of human color perception, matching the cones in our eyes that detect red, green, and blue wavelengths of light. This makes RGB a good model for replicating how we see color digitally. RYB’s origins are more historical than scientific.

RGB provides a larger gamut of colors. The RGB color space contains more discernible colors than the gamut available in RYB. With RGB you aren’t limited to the colors possible with traditional pigments. Pure saturated cyans and vivid violets, for example, are outside the RYB gamut but within RGB.

RGB enables consistent color mixing. Combining RGB colors adds the component values linearly. Mixing RYB pigments doesn’t blend cleanly or predictably. RGB provides control and precision for combining hues in color editing software.

In summary, because of its digital foundations, alignment with human vision, larger gamut, and reliable color mixing, RGB serves as the standard model for digital, web, TV, game, and graphic design work today. RYB remains useful for traditional painting but has limitations in the digital realm.

The History and Origins of RYB

The RYB color model originated in the 18th century as a way to systematize color mixing for painters. Before RYB, artists relied on their intuition when blending pigments on a palette. RYB established a structured approach based on three primary colors and the resulting secondary mixtures.

Here’s a brief history behind the development of the RYB system:

– Early color theorists like Isaac Newton proposed that the primaries were red, yellow, and blue. These seemed logical as the building blocks for mixing other hues.

– In 1704, German philosopher J.C. Le Blon theorized that all colors derive from three primaries. He used red, yellow, and blue in his color etchings.

– In 1725, French priest N. O. De La Porte published a book formalizing RYB primary colors and demonstrating how to mix them into secondary shades.

– The RYB model was widely adopted by artists and teachers over the 18th and 19th centuries. It influenced color instruction at art academies.

– RYB provided a structured way to think about color relationships on the artist’s palette. However, it was based more on artistic tradition than the emerging science of color vision.

While useful for grinding and mixing artist pigment, RYB has origins as an intuitive approach rather than a model of human visual response. Modern understanding of colorimetry has since paved the way for improved color systems like RGB.

Limitations of the RYB System

While RYB provided a foundation for artists to systematically blend pigments, it has some inherent limitations that RGB improves upon:

– Restricted gamut – No pure red, green or blue pigments existed when RYB was established. The RYB gamut is smaller than what humans can perceive and display digitally.

– Impure primaries – Traditional RYB primaries were mineral pigments that defied pure hues. Cadmium red, lead-tin yellow, and ultramarine blue approximate but don’t match pure red, green, and blue wavelengths.

– Inconsistent mixing – Blending RYB pigments together doesn’t create clean secondary or tertiary colors. Mixing blue and yellow makes a dull green unlike pure hues in nature.

– Black desaturation – Adding black pigment to RYB colors mutes them towards grey rather than smoothly desaturating the hue. RGB allows true shade and tint adjustment.

– Hue shifting – Within RYB, it’s difficult to keep a paint mixture at the same exact hue while only changing its brightness and saturation. The hue often shifts when mixing white, black, or other colors.

– No pure green – In the RYB system, green is considered a secondary mix of yellow and blue pigments. There is no available green primary unlike in RGB.

Due to these technical paint mixing limitations, RYB fails to match human color perception. RGB provides a complete palette natively suited for on-screen media.

The RGB Color Model and Digital Displays

RGB, which stands for red, green, and blue, is the predominant color model used for digital images, video, TV, web, games, and other media. Here’s an overview of the RGB system and why it’s effective for modern displays:

– Additive primaries – Instead of pigments, RGB is based on red, green, and blue light. Combining colored light adds the components to recreate a wide gamut of hues.

– Matches human vision – RGB aligns with the cone cells in our retinas that detect red, green, and blue wavelengths. This mimics how we see color.

– Emitted light – Pixels on screens directly emit red, green, and blue light. RGB is the native model for displaying images on monitors.

– Larger gamut – RGB can create more discernible colors than possible with RYB pigment mixing, especially vivid cyans, magentas, and saturated hues.

– True primaries – Lasers and LEDs can produce pure wavelengths of red, green, and blue light unmatched by any paint pigments.

– Consistent mixing – Combining RGB colors adds the value of each channel directly. The mixtures remain exact and predictable.

– Perceptual encoding – RGB can be gamma adjusted to map to human perception. This optimizes use of bits when digitally encoding colors.

Due to its suitability for digital imaging, RGB provides a complete color space for on-screen media and ensures accurate color reproduction. RYB can’t match its performance.

Converting Between RYB and RGB

Because RYB and RGB are fundamentally different color systems, converting colors accurately between them is challenging:

– There are no direct color equivalents between RYB pigments and RGB wavelengths of light. For example, cadmium red paint reflects orangey light unlike pure red RGB light.

– The RGB gamut has colors outside the range of RYB. Saturated purples, cyans, and greens can’t be replicated with RYB pigment mixing.

– Similarly, browns and earthy tones available in RYB lie outside the RGB gamut. RGB can’t directly produce these colors.

– Converting RYB to RGB risks unexpected hue shifts. A color balanced in a RYB painting may take on different nuances in RGB.

– The RYB primaries themselves have no exact RGB values. RYB red, yellow, and blue are only rough approximations within RGB.

– RGB mixes additively while RYB combines more opaquely so color mixtures won’t translate the same across models.

Here is a sample color conversion table showing very rough RYB and RGB equivalents:

RYB Color	Approx. RGB Equivalent
Cadmium Red	(255, 70, 60)
Lead-Tin Yellow	(255, 190, 0)
Ultramarine Blue	(70, 70, 255)

As seen above, accurate RYB to RGB conversion is near impossible. Starting colors in RGB is best for digital media. RYB is better suited to traditional paints rather than digital imaging.

Advantages of the RGB Model

Here are some of the key technical advantages of using the RGB color model compared to RYB:

– Wider gamut – RGB produces a broader range of colors, especially cyans, greens, and magentas impossible with RYB pigment mixing.

– Additive mixing – Combining RGB colors adds their components for accurate, linear color mixing. RYB blending is less predictable.

– True primaries – Lasers produce pure RGB primaries at specific wavelengths. No RYB pigment has a perfect hue like pure red, green or blue light.

– Perceptual encoding – RGB allows gamma correction to match human perception. This provides superior color reproduction compared to RYB.

– Digital native – RGB is natively suited for digital cameras, scanners, displays, and image formats. RYB introduces analog/digital conversion errors.

– Consistent hues – Adjusting the brightness of an RGB hue preserves the original color. RYB colors shift unpredictably when mixing with white/black.

– Modern colorimetry – RGB better represents how human vision detects color based on modern color science. RYB is an outdated, prescientific system.

For today’s digital graphics and media, RGB offers unparalleled color precision and flexibility compared to the traditional RYB approach.

Examples Comparing RYB and RGB

Here are some examples that demonstrate the differences between the RYB and RGB color systems:

– RYB can’t produce a vivid pure green as it lacks a green primary. Mixing blue and yellow pigments makes a dull, desaturated green.

– RGB can display 100% vivid greens by turning up just the green component. This pure vivid green is impossible in RYB.

Shades and tints

– Adding white and black pigments to RYB colors mutes them towards grey rather than smoothly lightening or darkening the hue.

– In RGB, tints and shades maintain the same hue while changing brightness. Green stays green even at light and dark shades.

Cyan vs. green-blue

– In RYB, mixing green and blue paint creates an olive muddy color, not a pure vibrant cyan.

– RGB can combine saturated green and blue light to form vibrant cyans beyond the RYB gamut.

– The most vivid magentas can’t be replicated with RYB due to impure primaries and restricted gamut. RGB produces rich, saturated magentas.

– RYB purples and reds are more muted and earthy compared to RGB’s pure, electric hues.

As seen above, the RYB and RGB models yield very different results for mixing, shading, and producing saturated colors. RGB aligns better with digital media and human vision.

Conclusion

While the RYB color model provides a framework for blending artist pigments, RGB is better suited for modern digital graphics, video, and photography. Because it matches human color vision, provides a wider gamut, and enables precise color mixing, RGB serves as the standard for all visual media displayed on screens.

The days of RYB dominance are waning as digital processes expand across art and design fields. RGB offers a complete color space natively compatible with camera sensors, software, and displays. Adopting RGB over RYB ensures accurate color representation and vivid hues in the digital realm.