#51BDE7#51BDE7

#51BDE7 is a light, moderate cyan. Relative luminance 0.439; OKLCH L 75.2% C 0.115 H 227.1°. Best body text is #000000 at 9.78:1 contrast (WCAG AA passes).

Color values

HEX	#51BDE7
RGB	rgb(81, 189, 231)
HSL	hsl(197, 76%, 61%)
HSV	hsv(197, 65%, 91%)
CMYK	cmyk(64.9%, 18.2%, 0%, 9.4%)
CIE-LAB	lab(72.17, -18.24, -30.07)
CIE-LCH	lch(72.17, 35.17, 238.75°)
OKLab	oklab(75.25% -0.0782 -0.084)
OKLCH	oklch(75.25% 0.115 227.1)
XYZ	xyz(36.0090, 43.9102, 82.1636)
Luminance	0.4391 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51BDE7 #E77B51

analogous

#51E7C6 #51BDE7 #5172E7

triadic

#51BDE7 #E751BD #BDE751

tetradic

#51BDE7 #C651E7 #E77B51 #72E751

square

#51BDE7 #C651E7 #E77B51 #72E751

split-complementary

#51BDE7 #E75172 #E7C651

monochromatic

#177EA7 #1EA7DC #51BDE7 #87D1EE #BDE6F6

Accessibility & contrast

On white

2.15

#51BDE7 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.78

#51BDE7 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51BDE7

9.78:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51BDE7	#FFFFFF	#000000	##000000
##51BDE7	1.00	2.15	9.78	9.78
#FFFFFF	2.15	1.00	21.00	21.00
#000000	9.78	21.00	1.00	1.00
##000000	9.78	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#A7BAE9

Deuteranopia (green-blind)

#92AAE6

Tritanopia (blue-blind)

#00C9CB

Achromatopsia (no color)

#B1B1B1

Design tokens & code

CSS

--color: #51bde7;
/* rgb */ color: rgb(81, 189, 231);
/* oklch */ color: oklch(75.2% 0.115 227.1);

Tailwind

colors: {
  custom: {
    50: '#91d1ee',
    500: '#51bde7',
    950: '#000000',
  },
}

SCSS

$custom: #51bde7;
$custom-light: #91d1ee;
$custom-dark: #000000;

JSON

{
  "hex": "#51bde7",
  "rgb": {
    "r": 81,
    "g": 189,
    "b": 231
  },
  "hsl": {
    "h": 196.8,
    "s": 75.758,
    "l": 61.176
  },
  "oklch": {
    "l": 0.75249,
    "c": 0.1148,
    "h": 227.1
  },
  "luminance": 0.43914
}

Semantic roles & 50–950 ramp

primary

#51BDE7

secondary

#E6BEAE

accent

#460ED8

background

#F9FCFE

surface

#F2F9FD

border

#CCD2D5

text

#0E1416

muted

#7E8284

Preview Lab

Preview with #51BDE7

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

Preview Lab → · Contrast checker → · Palette generator →