#51B2DE#51B2DE

#51B2DE is a light, moderate cyan. Relative luminance 0.389; OKLCH L 72.3% C 0.111 H 230.6°. Best body text is #000000 at 8.77:1 contrast (WCAG AA passes).

Color values

HEX	#51B2DE
RGB	rgb(81, 178, 222)
HSL	hsl(199, 68%, 59%)
HSV	hsv(199, 64%, 87%)
CMYK	cmyk(63.5%, 19.8%, 0%, 12.9%)
CIE-LAB	lab(68.65, -15.26, -30.59)
CIE-LCH	lch(68.65, 34.18, 243.49°)
OKLab	oklab(72.33% -0.0702 -0.0856)
OKLCH	oklch(72.33% 0.111 230.6)
XYZ	xyz(32.4934, 38.8607, 74.8815)
Luminance	0.3886 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51B2DE #DE7D51

analogous

#51DEC3 #51B2DE #516CDE

triadic

#51B2DE #DE51B2 #B2DE51

tetradic

#51B2DE #C351DE #DE7D51 #6CDE51

square

#51B2DE #C351DE #DE7D51 #6CDE51

split-complementary

#51B2DE #DE516C #DEC351

monochromatic

#1D7198 #2798CB #51B2DE #84C9E8 #B8E0F2

Accessibility & contrast

On white

2.39

#51B2DE on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.77

#51B2DE on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51B2DE

8.77:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51B2DE	#FFFFFF	#000000	##000000
##51B2DE	1.00	2.39	8.77	8.77
#FFFFFF	2.39	1.00	21.00	21.00
#000000	8.77	21.00	1.00	1.00
##000000	8.77	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#9CB0E0

Deuteranopia (green-blind)

#88A1DD

Tritanopia (blue-blind)

#00BEC0

Achromatopsia (no color)

#A7A7A7

Design tokens & code

CSS

--color: #51b2de;
/* rgb */ color: rgb(81, 178, 222);
/* oklch */ color: oklch(72.3% 0.111 230.6);

Tailwind

colors: {
  custom: {
    50: '#8fc9e8',
    500: '#51b2de',
    950: '#000000',
  },
}

SCSS

$custom: #51b2de;
$custom-light: #8fc9e8;
$custom-dark: #000000;

JSON

{
  "hex": "#51b2de",
  "rgb": {
    "r": 81,
    "g": 178,
    "b": 222
  },
  "hsl": {
    "h": 198.723,
    "s": 68.116,
    "l": 59.412
  },
  "oklch": {
    "l": 0.72328,
    "c": 0.11067,
    "h": 230.6
  },
  "luminance": 0.38864
}

Semantic roles & 50–950 ramp

primary

#51B2DE

secondary

#E1BBAA

accent

#733DEB

background

#F9FCFE

surface

#F2F8FC

border

#CCD1D5

text

#0E1316

muted

#7E8284

Preview Lab

Preview with #51B2DE

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

Preview Lab → · Contrast checker → · Palette generator →