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.I have been studying photos of yellow flowers too, and while I see it is common to use browns and oranges, what about a clean yellow flower, perfectly yellow, but in the shade..
here is the photo I am talking about..isnt it a beautiful photo, I gave it a shot with my watercolors, and did not please myself at all with trying to shade them,
can I please have some assistance with the issue of shading these yellow flowers.
I think that with yellows, people make the mistake of thinking that, because the brightly lit areas are "yellow", that in order to paint the shaded areas we have to start with what we generally call "yellow" paint, and then darken it down.
Steve is correct in looking at the shaded areas with photoshop, and noting that the actual colour in that area is a brown.
The colours we normally call "yellow" are in fact
high-value yellow - if we reduce the
value, while holding hue constant, then orangey-yellows become browns at lower values, and for yellows which are of hues increasingly towards greenish-yellows, the lower value ones change from browns towards olive-greens.
Adding purple to a yellow will lower its value, but will also markedly lower its chroma (so the colour becomes less intense as well as darker).
I'd suggest a better approach is to recognise that "low-value yellows" ARE browns through to olive-greens, and paint the areas accordingly -
and these darker areas do NOT necessarily need to be mixed from "yellow" paint.
Dave