#51A3E8#51A3E8

#51A3E8 is a light, vivid cyan. Relative luminance 0.338; OKLCH L 69.4% C 0.130 H 246.5°. Best body text is #000000 at 7.75:1 contrast (WCAG AA passes).

Color values

HEX	#51A3E8
RGB	rgb(81, 163, 232)
HSL	hsl(207, 77%, 61%)
HSV	hsv(207, 65%, 91%)
CMYK	cmyk(65.1%, 29.7%, 0%, 9%)
CIE-LAB	lab(64.78, -3.82, -42.10)
CIE-LCH	lch(64.78, 42.28, 264.82°)
OKLab	oklab(69.4% -0.0517 -0.1189)
OKLCH	oklch(69.4% 0.13 246.5)
XYZ	xyz(31.0506, 33.7667, 81.2095)
Luminance	0.3377 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51A3E8 #E89651

analogous

#51E8E2 #51A3E8 #5158E8

triadic

#51A3E8 #E851A3 #A3E851

tetradic

#51A3E8 #E251E8 #E89651 #58E851

square

#51A3E8 #E251E8 #E89651 #58E851

split-complementary

#51A3E8 #E85158 #E8E251

monochromatic

#1666A8 #1D86DE #51A3E8 #87C0EF #BDDCF6

Accessibility & contrast

On white

2.71

#51A3E8 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

7.75

#51A3E8 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51A3E8

7.75:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51A3E8	#FFFFFF	#000000	##000000
##51A3E8	1.00	2.71	7.75	7.75
#FFFFFF	2.71	1.00	21.00	21.00
#000000	7.75	21.00	1.00	1.00
##000000	7.75	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#85A5EB

Deuteranopia (green-blind)

#7097E7

Tritanopia (blue-blind)

#00B3BB

Achromatopsia (no color)

#9D9D9D

Design tokens & code

CSS

--color: #51a3e8;
/* rgb */ color: rgb(81, 163, 232);
/* oklch */ color: oklch(69.4% 0.130 246.5);

Tailwind

colors: {
  custom: {
    50: '#90beef',
    500: '#51a3e8',
    950: '#000000',
  },
}

SCSS

$custom: #51a3e8;
$custom-light: #90beef;
$custom-dark: #000000;

JSON

{
  "hex": "#51a3e8",
  "rgb": {
    "r": 81,
    "g": 163,
    "b": 232
  },
  "hsl": {
    "h": 207.417,
    "s": 76.65,
    "l": 61.373
  },
  "oklch": {
    "l": 0.69396,
    "c": 0.12965,
    "h": 246.5
  },
  "luminance": 0.3377
}

Semantic roles & 50–950 ramp

primary

#51A3E8

secondary

#E7C8AE

accent

#6A0DD9

background

#F9FBFE

surface

#F2F6FD

border

#CCD0D5

text

#0E1216

muted

#7E8184

Preview Lab

Preview with #51A3E8

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

Preview Lab → · Contrast checker → · Palette generator →