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.

She was wearing a new hair ornament.

Untangling her tangled hair was difficult.

Coma Berenices is a spring constellation, and it's hard to find because it doesn't have very bright stars.

She tied her hair using a new hairpin.

I'm always impressed by her beautiful hair.

She tied her hair using a 'kamimoji'.

She attended the party wearing a wig.