Hello Mirek,

The issue has been fixed for Breeze Light and Dark. Thank you for that! You also forget to remove debug code in production (line 513 - ChGtk4.cpp):

PNGEncoder().SaveFile("/home/cxl/item.png", item);

For other themes, I noticed that there is a issue for Adwaita (KDE Gtk Theme). The bar text should be white instead of black. I attached U++ (left) comparison with Chrom (right).


Klugier

int Diff(RGBA a, RGBA b)
{
	return max(abs(a.a - b.a), max(abs(a.r - b.r) / 2, max(abs(a.b - b.b) / 5, abs(a.g - b.g))));
}