Answer —
Usually, primary colors like blue, red, and yellow get the most amount of 'screentime'. Considering color theory, it makes sense. These three colors make up some of the most ubiquitous emotions expressed in art.
Blue invokes a vast deepness. It's also more commonly associated with sadness or despair. It's used to paint the colors of the sky and sea.
Red usually means anger or danger, but it could also signify energy and power.
Yellow is reserved for bright happiness or positivity.
These are all obviously surface level. On a more practical standpoint, these colors also make up the rest of the color wheel. Mixing paints and hues gets you other colors, which is essential to the art process.
The lack of color could be considered important, too. Black and white also make up artwork.
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