#51B2DF#51B2DF

#51B2DF is a light, moderate cyan. Relative luminance 0.389; OKLCH L 72.4% C 0.112 H 231.2°. Best body text is #000000 at 8.78:1 contrast (WCAG AA passes).

Color values

HEX	#51B2DF
RGB	rgb(81, 178, 223)
HSL	hsl(199, 69%, 60%)
HSV	hsv(199, 64%, 87%)
CMYK	cmyk(63.7%, 20.2%, 0%, 12.5%)
CIE-LAB	lab(68.69, -14.94, -31.08)
CIE-LCH	lch(68.69, 34.48, 244.32°)
OKLab	oklab(72.37% -0.0698 -0.087)
OKLCH	oklch(72.37% 0.112 231.2)
XYZ	xyz(32.6278, 38.9145, 75.5895)
Luminance	0.3892 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51B2DF #DF7E51

analogous

#51DFC5 #51B2DF #516BDF

triadic

#51B2DF #DF51B2 #B2DF51

tetradic

#51B2DF #C551DF #DF7E51 #6BDF51

square

#51B2DF #C551DF #DF7E51 #6BDF51

split-complementary

#51B2DF #DF516B #DFC551

monochromatic

#1C7299 #2698CD #51B2DF #85C9E9 #B8E0F2

Accessibility & contrast

On white

2.39

#51B2DF on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.78

#51B2DF on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51B2DF

8.78:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51B2DF	#FFFFFF	#000000	##000000
##51B2DF	1.00	2.39	8.78	8.78
#FFFFFF	2.39	1.00	21.00	21.00
#000000	8.78	21.00	1.00	1.00
##000000	8.78	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#9BB0E1

Deuteranopia (green-blind)

#88A1DE

Tritanopia (blue-blind)

#00BEC1

Achromatopsia (no color)

#A8A8A8

Design tokens & code

CSS

--color: #51b2df;
/* rgb */ color: rgb(81, 178, 223);
/* oklch */ color: oklch(72.4% 0.112 231.2);

Tailwind

colors: {
  custom: {
    50: '#8fc9e9',
    500: '#51b2df',
    950: '#000000',
  },
}

SCSS

$custom: #51b2df;
$custom-light: #8fc9e9;
$custom-dark: #000000;

JSON

{
  "hex": "#51b2df",
  "rgb": {
    "r": 81,
    "g": 178,
    "b": 223
  },
  "hsl": {
    "h": 199.014,
    "s": 68.932,
    "l": 59.608
  },
  "oklch": {
    "l": 0.72372,
    "c": 0.11154,
    "h": 231.2
  },
  "luminance": 0.38918
}

Semantic roles & 50–950 ramp

primary

#51B2DF

secondary

#E1BCAA

accent

#743CEC

background

#F9FCFE

surface

#F2F8FC

border

#CCD1D5

text

#0E1316

muted

#7E8284

Preview Lab

Preview with #51B2DF

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

Preview Lab → · Contrast checker → · Palette generator →