There is no 'pale', it is merely an adjective to describe different colours. For example 'pale pink', would mean a very light-toned, pigment pink. 'Pale', as a colour, necessarily would be a whitish...
I am sorry, but you cannot describe a color. The dictionary says yellow is - Yellow is a color like that of egg yolk, ripe lemons, etc.; the primary color between green and orange in the visible...