If you're painting over an old painting, or change your choice of colors after you've been painting a while (for whatever reason), you may get small bits where a 'wrong' or leftover color still shows. Whether this is indeed a problem or not depends on the colors involved.
In the painting in the photo above, the blue in the final painting was Prussian blue, but initially I used some cobalt turquoise light hue in the foreground. My intention had been to use the cobalt turquoise for shallow water, but then I decided that the shallows would be dominated by foam and not show any clear water. For this to work visually, the white of the foam then needed to be mixed with the Prussian blue of the open sea.
When I'd finished, I noticed that in a few areas there were tiny bits of the cobalt turquoise still showing. Now, is it really a problem? A tiny bit of wrong or stray color in a painting can be extremely distracting, or it can enhance a painting by being visually intriguing but noticeable only on close inspection.
In this particular instance, I think it simply adds visual interest. If it's been some other color, say a bright orange, it may well have been annoying and distracting. It all depends on the color(s) involved, and on your eye. One of the 'rules' for getting harmonious colors in a painting, is to select a small range of colors and stick to these. But sometimes breaking the rules gives better results.
In the painting in the photo above, the blue in the final painting was Prussian blue, but initially I used some cobalt turquoise light hue in the foreground. My intention had been to use the cobalt turquoise for shallow water, but then I decided that the shallows would be dominated by foam and not show any clear water. For this to work visually, the white of the foam then needed to be mixed with the Prussian blue of the open sea.
When I'd finished, I noticed that in a few areas there were tiny bits of the cobalt turquoise still showing. Now, is it really a problem? A tiny bit of wrong or stray color in a painting can be extremely distracting, or it can enhance a painting by being visually intriguing but noticeable only on close inspection.
In this particular instance, I think it simply adds visual interest. If it's been some other color, say a bright orange, it may well have been annoying and distracting. It all depends on the color(s) involved, and on your eye. One of the 'rules' for getting harmonious colors in a painting, is to select a small range of colors and stick to these. But sometimes breaking the rules gives better results.