Tailwind slate-900
#0f172a — every format, its contrast behaviour, and the rest of the slate scale.
#0f172a
Hex
#0f172aRGB
rgb(15 23 42)HSL
hsl(222 47% 11%)Background class
bg-slate-900Text class
text-slate-900Border class
border-slate-900On white: 17.85:1 — passes AA for text
On slate-900: 1:1 — decoration only