Using Pigment to Make Blue

We were really surprised to find that all sorts of plants keep creating this striation. This is what we call disorder and different flowering plants are different amounts of disorder. But this disorder always creates the same colour, always shift the effect towards the blue UV end of the spectrum. So why is it that it was always shift towards the blue? And one thing we do about is that actually blue and UV are colours that pollinators can see really well,. We can't see in the UV but lots of insects can. so our idea was maybe this is a way plants use to create blue.