His painting uses seven colors.

In Buddhism, '色' is said to refer to the material form.

Her dress was red, and it was very beautiful.

His favorite color is blue.

Her coat was mustard-colored and very noticeable.

It's better for him not to know the truth. After all, ignorance is bliss.

He is feigning ignorance about that problem.

In order to understand his feelings, I had a deep conversation with him.

God only knows what he is thinking.

He is working hard to make his abilities known to the world.