#516ECB
≈ royalblue · rgb(81, 110, 203)
Color formats
HEX#516ECB
RGBrgb(81, 110, 203)
HSLhsl(226, 54%, 56%)
HSVhsv(226, 60%, 80%)
OKLCHoklch(56% 0.15 268)
CMYKcmyk(60%, 46%, 0%, 20%)
Contrast & accessibility
On white4.73:1AA pass
On black4.44:1below AA
Best text color#FFFFFF
Nearest CSS name: royalblue
Copy-ready code
CSS custom properties
:root {
--royalblue: #516ecb;
--royalblue-rgb: 81 110 203;
--royalblue-oklch: oklch(56% 0.15 268);
}The space-separated triple lets you set alpha without a second variable:
background: rgb(var(--royalblue-rgb) / 40%);
Tailwind (arbitrary value)
bg-[#516ecb] text-[#516ecb] border-[#516ecb]
Shades & tints
Color harmonies
About this color
#516ECB is a color with the RGB value rgb(81, 110, 203). Its closest CSS named color is "royalblue". 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.