Yellow

Look at the flowers

Look how they bloom for you

And all the things you do

Yeah, they were all yellow

[slightly modified Coldplay lyrics]

Thank you, Lord, for all creation that blooms for you...

and all the things that you do...

White

Matthew 6:28-29 

And why do you worry about clothing? 

Consider the lilies of the field, how they grow; they neither toil nor spin, 

yet I tell you, even Solomon in all his glory was not clothed like one of these.

Black, Speckled, Semi-Transparent

I am black and beautiful,

O daughters of Jerusalem... 

Song of Solomon 1:5

Scarlet/ Snow

Isaiah 1:18 

... though your sins are like scarlet, they shall be like snow; though they are red like crimson, they shall become like wool.