INDECISIVE ON TWO DIFFERENT SHADES OF TURQUOISE MATERIAL!?

I have two different shades of turquoise, one is a light shade and the other is a darker shade. I'm trying to decide whether I should use the light turquoise for the Edwardian (1900-1919) style dress and the dark turquoise as the bed sheet, or if I should have the dark turquoise as the early 20th century dress and the light turquoise as the bed sheet. Please let me know what you think.