#51A0E8#51A0E8

#51A0E8 is a light, vivid cyan. Relative luminance 0.327; OKLCH L 68.7% C 0.132 H 248.4°. Best body text is #000000 at 7.54:1 contrast (WCAG AA passes).

Color values

HEX	#51A0E8
RGB	rgb(81, 160, 232)
HSL	hsl(209, 77%, 61%)
HSV	hsv(209, 65%, 91%)
CMYK	cmyk(65.1%, 31%, 0%, 9%)
CIE-LAB	lab(63.93, -2.12, -43.44)
CIE-LCH	lch(63.93, 43.49, 267.21°)
OKLab	oklab(68.73% -0.0487 -0.1228)
OKLCH	oklch(68.73% 0.132 248.4)
XYZ	xyz(30.5242, 32.7140, 81.0341)
Luminance	0.3272 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51A0E8 #E89951

analogous

#51E8E4 #51A0E8 #5155E8

triadic

#51A0E8 #E851A0 #A0E851

tetradic

#51A0E8 #E451E8 #E89951 #55E851

square

#51A0E8 #E451E8 #E89951 #55E851

split-complementary

#51A0E8 #E85155 #E8E451

monochromatic

#1663A8 #1D82DE #51A0E8 #87BEEF #BDDBF6

Accessibility & contrast

On white

2.78

#51A0E8 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

7.54

#51A0E8 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51A0E8

7.54:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51A0E8	#FFFFFF	#000000	##000000
##51A0E8	1.00	2.78	7.54	7.54
#FFFFFF	2.78	1.00	21.00	21.00
#000000	7.54	21.00	1.00	1.00
##000000	7.54	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#80A3EB

Deuteranopia (green-blind)

#6C94E7

Tritanopia (blue-blind)

#00B1BA

Achromatopsia (no color)

#9B9B9B

Design tokens & code

CSS

--color: #51a0e8;
/* rgb */ color: rgb(81, 160, 232);
/* oklch */ color: oklch(68.7% 0.132 248.4);

Tailwind

colors: {
  custom: {
    50: '#90bbef',
    500: '#51a0e8',
    950: '#000000',
  },
}

SCSS

$custom: #51a0e8;
$custom-light: #90bbef;
$custom-dark: #000000;

JSON

{
  "hex": "#51a0e8",
  "rgb": {
    "r": 81,
    "g": 160,
    "b": 232
  },
  "hsl": {
    "h": 208.609,
    "s": 76.65,
    "l": 61.373
  },
  "oklch": {
    "l": 0.68728,
    "c": 0.13211,
    "h": 248.4
  },
  "luminance": 0.32717
}

Semantic roles & 50–950 ramp

primary

#51A0E8

secondary

#E7C9AE

accent

#6E0DD9

background

#F9FBFE

surface

#F2F6FD

border

#CCD0D5

text

#0E1116

muted

#7E8084

Preview Lab

Preview with #51A0E8

Body copy rendered with the generated semantic roles for this colour.

Preview Lab → · Contrast checker → · Palette generator →