The objects all have about the same base color (dark blue/grey) but differ in brightness/darkness.
Is there a simple method to change the base color to another color, e.g. red?
By this I mean, how can I assign a red color to one of these triangles and automatically change all other areas according to this new base color. I want to keep the relation between the shapes, so if a shape A is darker than a shape B, the shape A should also get a darker red.