Make heatmap colors more distinct (#13533)
Make heatmap colors more distinct (#13533)

* Make heatmap colors more distinct

Fixes: https://github.com/go-gitea/gitea/issues/13529

* use opaque colors

* make first color less opaque

Co-authored-by: techknowlogick <274271a2414b6bd0d2eb0401dd4ff6e85d7016a7@gitea.io>
cez81/gitea,go-gitea/gitea,sapk-fork/gitea,go-gitea/gitea,sapk-fork/gitea,sapk-fork/gitea,sapk-fork/gitea,vdbt/gitea,cez81/gitea,cez81/gitea,vdbt/gitea,go-gitea/gitea