Strange dark muddy color on brush edge?

[Popnikola]

Hi guys,

I'm new here. I hope someone can help me. Im making some kind of wallpaper image in 2000x2000pixels size. I have used 2 realistic brushes from a pack I bought. THey have bright colors. But when the 2 brushes overlap there is s strange dark blue edge on the pink brush edge which looks muddy and not right. It almost looks like a drop shadow, while there is no effect on the layer.

This is what im talking about: https://i.imgur.com/albvjU4.png and here even more zoomed in https://i.imgur.com/OKKXoyS.png

How can I make sure this strange dark blue edge doesnt appear? I want it to be as slick as possible, no color changes like this. Just pink on blue.

[davescm]

It looks like the brush edge is slightly soft resulting in a slight blend at the edges - see the effect below of a hard edge brush and very soft brush with similar colours and normal blending mode (although the width is much greater ) to those you show

Dave

[Popnikola]

So no trick to make the dark blue less blue or something?