I didn't know I can use raw (non-escaped) svg for css background. background-image: url('data:image/svg+xml;utf8,<svg width="100" height="100" xmlns="http://www.w3.org/2000/svg"><circle cx="25" cy="25" r="25" fill="blue" /><circle cx="75" cy="25" r="25" fill="blue" /></circle></circle></svg>

| R' | | r1 r2 r3 r4 r5 | | R | | G' | | g1 g2 g3 g4 g5 | | G | | B' | = | b1 b2 b3 b4 b5 | * | B | | A' | | a1 a2 a3 a4 a5 | | A | | 1 | | 0 0 0 0 1 | | 1 | R' = r1*R + r2*G + r3*B + r4*A + r5 G' = g1*R + g2*G + g3*B + g4*A + g5 B' = b1*R…