#51A4EE#51A4EE

#51A4EE is a light, vivid cyan. Relative luminance 0.345; OKLCH L 69.9% C 0.136 H 248.0°. Best body text is #000000 at 7.89:1 contrast (WCAG AA passes).

Color values

HEX	#51A4EE
RGB	rgb(81, 164, 238)
HSL	hsl(208, 82%, 63%)
HSV	hsv(208, 66%, 93%)
CMYK	cmyk(66%, 31.1%, 0%, 6.7%)
CIE-LAB	lab(65.33, -2.40, -44.52)
CIE-LCH	lch(65.33, 44.59, 266.92°)
OKLab	oklab(69.93% -0.0509 -0.1259)
OKLCH	oklch(69.93% 0.136 248)
XYZ	xyz(32.0956, 34.4700, 85.8342)
Luminance	0.3447 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51A4EE #EE9B51

analogous

#51EEE9 #51A4EE #5156EE

triadic

#51A4EE #EE51A4 #A4EE51

tetradic

#51A4EE #E951EE #EE9B51 #56EE51

square

#51A4EE #E951EE #EE9B51 #56EE51

split-complementary

#51A4EE #EE5156 #EEE951

monochromatic

#1167B3 #1987E9 #51A4EE #89C1F3 #C1DEF9

Accessibility & contrast

On white

2.66

#51A4EE on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

7.89

#51A4EE on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51A4EE

7.89:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51A4EE	#FFFFFF	#000000	##000000
##51A4EE	1.00	2.66	7.89	7.89
#FFFFFF	2.66	1.00	21.00	21.00
#000000	7.89	21.00	1.00	1.00
##000000	7.89	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#83A7F1

Deuteranopia (green-blind)

#6E98ED

Tritanopia (blue-blind)

#00B6BE

Achromatopsia (no color)

#9F9F9F

Design tokens & code

CSS

--color: #51a4ee;
/* rgb */ color: rgb(81, 164, 238);
/* oklch */ color: oklch(69.9% 0.136 248.0);

Tailwind

colors: {
  custom: {
    50: '#91bef4',
    500: '#51a4ee',
    950: '#000000',
  },
}

SCSS

$custom: #51a4ee;
$custom-light: #91bef4;
$custom-dark: #000000;

JSON

{
  "hex": "#51a4ee",
  "rgb": {
    "r": 81,
    "g": 164,
    "b": 238
  },
  "hsl": {
    "h": 208.28,
    "s": 82.199,
    "l": 62.549
  },
  "oklch": {
    "l": 0.69925,
    "c": 0.13586,
    "h": 248
  },
  "luminance": 0.34473
}

Semantic roles & 50–950 ramp

primary

#51A4EE

secondary

#EACCB1

accent

#6D07DF

background

#F9FBFE

surface

#F2F6FD

border

#CCD0D5

text

#0E1217

muted

#7E8185

Preview Lab

Preview with #51A4EE

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

Preview Lab → · Contrast checker → · Palette generator →