WHY PAINTERS CAN USE COLORS THAT PHOTOGRAPHERS CAN ONLY DREAM OF!
By Guest Writer, Jared Updike (taken with permission from a Discord post in January 2026)
The colors that do not come through very well in photography are the secondary colors of light. So red, lime green, and blue, and everything on the triangle between them are well represented by triangle sRGB color space, but very saturated cyan, teal, turquoise, especially that greenish turquoise color, is one area that is out of gamut. Also, tangerine orange, yellow orange, and neon orange tend to clip. The last part is the line of purples, so super saturated magenta and fuchsia colors tend to clip and seem same-y whereas in the real world (outside of digital color reproduction) many more such colors and more subtlety is possible. So magenta, turquoises, certain oranges and also probably chartreuse colors too, in all their subtlety are clipped.
When you paint with those "out-of-gamut" colors your painting automatically does something that cannot be represented accurately by sRGB digital anything. (Although digital reproductions by definition will not do it justice. Womp womp!) So you get an automatic reason for using oil paints instead of just making digital prints of photos. I think it makes people do a double take because they have seen thousands of digital images that never show those colors. They may not be able to tell you why, but you will know why it catches people's eye.
See the image here.
This chromaticity diagram (truncated U shape) shows the limits of human perception based on decades of experiments. POOR is where digital capture and repoduction is poor, and OK is where things are OK. (Note that this digram cannot actually show you those missing, poorly reproduced colors because of these aforementioned limits!)
Here is a slightly clearer image of just how limited sRGB is:
The D65 white point above, is the fully desaturated point where R=G=B. What this means is that really saturated parts along the line between R and G, between G and B, and between B and R, are forced to be less saturated than in the real world. Hence these are color areas where saturated oil paints might chime in… even at lower values or higher values. That means you can mix saturated dark greens that photographers can’t even dream of! Dark fuchsia shadows, fluorescent deeply saturated browns and oranges, and bright high value colors in these areas that sRGB can’t touch. (FYI value or brightness is perpendicular to the plane here.) Just me and the bees enjoying all sorts of out-of-gamut colors.
The bright orange above does not turn yellow when you look at it in reality. And the dark shadows do not turn red when you look at it in person. It stays all one hue, to the eye. In addition, essentially all of the leaves, and especially the shadowy parts of the leaves in reality are much bluer and cooler, and almost none of the green has yellowy tinges to it. In person, the cool green brightens up without changing hue. If you can see the colors of the world around you more carefully than anyone else, and if you are aware of the limits of the tools that people are used to, especially all of the digital media we are surrounded by, and you can figure out how to reproduce the colors of the world in terms of colors in oil painting, people will just naturally be blown away by what you put on the canvas. It will feel like you’re getting away with something. It isn’t just about sticking straight pops of the most vibrant orange or fuchsia right on the canvas. It’s also about how you arrange the tension and release of saturation contrast, and how you compose it on the canvas overall. But when you nail it, unless people are just as aware of all the technical things happening, they will feel that kapow feeling and not know why. It’s like performing a magic trick.
The engineers who made the image processing pipeline on my iPhone were forced to make a decision about what to do when people try to take pictures of really brightly colored, out-of-gamut objects. In photo above, it looks like they shifted the hue of orange to be more yellow to make it appear brighter and then they shifted the dark toward red to read as still bright but less hot. But it really doesn’t look anything like the original. Like I said it all stays one hue.
If we call R red, then you can also paint a color I will call ultra-infra-red, meaning the reddest red people can see, which the sRGB R primary renders as a slightly tomatoey red. That is another point in oil-painting’s favor. Deeper reds. You could collect up objects that remind you of these colors. It is possible that even spot colors (individual print colors that are not limited to being reproduced by CMYK) might come in these shades. For example see attached photo below which uses neon orange as a primary (clipped to sRGB). n person, this box is almost as bright as the bird of paradise blooms.
Or you could keep swatches of oils of these colors on the wall as inspiration. THE FORBIDDEN CORNERS OF THE COLOR WHEEL! (Which is actually not a wheel but that truncated U shape.) Or you might gather paper paint swatches from a hardware store. I’m just trying to think of non-digital ways of keeping certain colors on hand for reference and inspiration.
(The DayGlo Color Corp offers vibrant daylight fluorescent pigments for coatings, plastics, packaging, textiles, and more. Bold color starts here. https://www.dayglo.co)
However you use these out-of-gamut colors in oil painting (sparingly of course), have fun with paintings that go far beyond the world of photography.
