color 是可数名词名词吗？

都可以的。

[countable, uncountable] the appearance that things have that results from the way in which they reflect light.

Red, orange and green are colours.

What's your favourite colour?

bright/dark/light colours

available in 12 different colours

the colour of the sky

Her hair is a reddish-brown colour.

Foods which go through a factory process lose much of their colour, flavour and texture.

The garden was a mass of colour.

colours [plural] the particular colours that are used on clothes, flags, etc. to represent a team, school, political party or country

Red and white are the team colours.

Spain’s national colours

(figurative) There are people of different political colours on the committee.

colours [plural] (especially British English) a flag, badge, etc. that represents a team, country, ship, etc.

Most buildings had a flagpole with the national colours flying.

sailing under the French colours

colour可作为可数名词和不可数名词

可数名词：1.颜色、色彩；2.颜料，染料

不可数名词：1.彩色（a colour TV）2.（尤指脸色的）红润，粉红，（尴尬时的）脸红

colours（复数形式）出现时，常表示（代表团队、国家、船等的）旗帜，徽章等（英式写法）