#63788A
≈ slategray · rgb(99, 120, 138)
Color formats
HEX#63788A
RGBrgb(99, 120, 138)
HSLhsl(208, 16%, 46%)
HSVhsv(208, 28%, 54%)
OKLCHoklch(56% 0.04 244)
CMYKcmyk(28%, 13%, 0%, 46%)
Contrast & accessibility
On white4.58:1AA pass
On black4.58:1AA pass
Best text color#000000
Nearest CSS name: slategray
Copy-ready code
CSS custom properties
:root {
--slategray: #63788a;
--slategray-rgb: 99 120 138;
--slategray-oklch: oklch(56% 0.04 244);
}The space-separated triple lets you set alpha without a second variable:
background: rgb(var(--slategray-rgb) / 40%);
Tailwind (arbitrary value)
bg-[#63788a] text-[#63788a] border-[#63788a]
Shades & tints
Color harmonies
About this color
#63788A is a color with the RGB value rgb(99, 120, 138). Its closest CSS named color is "slategray". 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.