#51B4DE#51B4DE

#51B4DE is a light, moderate cyan. Relative luminance 0.397; OKLCH L 72.8% C 0.110 H 229.0°. Best body text is #000000 at 8.93:1 contrast (WCAG AA passes).

Color values

HEX	#51B4DE
RGB	rgb(81, 180, 222)
HSL	hsl(198, 68%, 59%)
HSV	hsv(198, 64%, 87%)
CMYK	cmyk(63.5%, 18.9%, 0%, 12.9%)
CIE-LAB	lab(69.23, -16.32, -29.70)
CIE-LCH	lch(69.23, 33.88, 241.21°)
OKLab	oklab(72.79% -0.0723 -0.083)
OKLCH	oklch(72.79% 0.11 229)
XYZ	xyz(32.8942, 39.6624, 75.0151)
Luminance	0.3967 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51B4DE #DE7B51

analogous

#51DEC1 #51B4DE #516EDE

triadic

#51B4DE #DE51B4 #B4DE51

tetradic

#51B4DE #C151DE #DE7B51 #6EDE51

square

#51B4DE #C151DE #DE7B51 #6EDE51

split-complementary

#51B4DE #DE516E #DEC151

monochromatic

#1D7398 #279ACB #51B4DE #84CAE8 #B8E0F2

Accessibility & contrast

On white

2.35

#51B4DE on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.93

#51B4DE on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51B4DE

8.93:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51B4DE	#FFFFFF	#000000	##000000
##51B4DE	1.00	2.35	8.93	8.93
#FFFFFF	2.35	1.00	21.00	21.00
#000000	8.93	21.00	1.00	1.00
##000000	8.93	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#9EB1E0

Deuteranopia (green-blind)

#8BA3DD

Tritanopia (blue-blind)

#00C0C2

Achromatopsia (no color)

#A9A9A9

Design tokens & code

CSS

--color: #51b4de;
/* rgb */ color: rgb(81, 180, 222);
/* oklch */ color: oklch(72.8% 0.110 229.0);

Tailwind

colors: {
  custom: {
    50: '#8fcae8',
    500: '#51b4de',
    950: '#000000',
  },
}

SCSS

$custom: #51b4de;
$custom-light: #8fcae8;
$custom-dark: #000000;

JSON

{
  "hex": "#51b4de",
  "rgb": {
    "r": 81,
    "g": 180,
    "b": 222
  },
  "hsl": {
    "h": 197.872,
    "s": 68.116,
    "l": 59.412
  },
  "oklch": {
    "l": 0.72789,
    "c": 0.11006,
    "h": 229
  },
  "luminance": 0.39666
}

Semantic roles & 50–950 ramp

primary

#51B4DE

secondary

#E1BAAA

accent

#713DEB

background

#F9FCFE

surface

#F2F8FC

border

#CCD1D5

text

#0E1316

muted

#7E8284

Preview Lab

Preview with #51B4DE

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

Preview Lab → · Contrast checker → · Palette generator →