#A51C12
≈ firebrick · rgb(165, 28, 18)
Color formats
HEX#A51C12
RGBrgb(165, 28, 18)
HSLhsl(4, 80%, 36%)
HSVhsv(4, 89%, 65%)
OKLCHoklch(47% 0.17 30)
CMYKcmyk(0%, 83%, 89%, 35%)
Contrast & accessibility
On white7.57:1AA pass
On black2.77:1below AA
Best text color#FFFFFF
Nearest CSS name: firebrick
Copy-ready code
CSS custom properties
:root {
--firebrick: #a51c12;
--firebrick-rgb: 165 28 18;
--firebrick-oklch: oklch(47% 0.17 30);
}The space-separated triple lets you set alpha without a second variable:
background: rgb(var(--firebrick-rgb) / 40%);
Tailwind (arbitrary value)
bg-[#a51c12] text-[#a51c12] border-[#a51c12]
Shades & tints
Color harmonies
About this color
#A51C12 is a color with the RGB value rgb(165, 28, 18). Its closest CSS named color is "firebrick". On this page you'll find every format (HEX, RGB, HSL, HSV, OKLCH, CMYK), WCAG contrast against white and black, a full 50–950 shade scale, and complementary, analogous and triadic harmonies — each linking to its own color page.