#51BDE6#51BDE6

#51BDE6 is a light, moderate cyan. Relative luminance 0.439; OKLCH L 75.2% C 0.114 H 226.5°. Best body text is #000000 at 9.77:1 contrast (WCAG AA passes).

Color values

HEX	#51BDE6
RGB	rgb(81, 189, 230)
HSL	hsl(197, 75%, 61%)
HSV	hsv(197, 65%, 90%)
CMYK	cmyk(64.8%, 17.8%, 0%, 9.8%)
CIE-LAB	lab(72.13, -18.55, -29.58)
CIE-LCH	lch(72.13, 34.92, 237.91°)
OKLab	oklab(75.21% -0.0786 -0.0827)
OKLCH	oklch(75.21% 0.114 226.5)
XYZ	xyz(35.8682, 43.8539, 81.4219)
Luminance	0.4386 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51BDE6 #E67A51

analogous

#51E6C4 #51BDE6 #5172E6

triadic

#51BDE6 #E651BD #BDE651

tetradic

#51BDE6 #C451E6 #E67A51 #72E651

square

#51BDE6 #C451E6 #E67A51 #72E651

split-complementary

#51BDE6 #E65172 #E6C451

monochromatic

#187EA5 #1FA7DA #51BDE6 #87D1EE #BCE6F5

Accessibility & contrast

On white

2.15

#51BDE6 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.77

#51BDE6 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51BDE6

9.77:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51BDE6	#FFFFFF	#000000	##000000
##51BDE6	1.00	2.15	9.77	9.77
#FFFFFF	2.15	1.00	21.00	21.00
#000000	9.77	21.00	1.00	1.00
##000000	9.77	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#A7B9E8

Deuteranopia (green-blind)

#92AAE6

Tritanopia (blue-blind)

#00C9CA

Achromatopsia (no color)

#B1B1B1

Design tokens & code

CSS

--color: #51bde6;
/* rgb */ color: rgb(81, 189, 230);
/* oklch */ color: oklch(75.2% 0.114 226.5);

Tailwind

colors: {
  custom: {
    50: '#91d1ee',
    500: '#51bde6',
    950: '#000000',
  },
}

SCSS

$custom: #51bde6;
$custom-light: #91d1ee;
$custom-dark: #000000;

JSON

{
  "hex": "#51bde6",
  "rgb": {
    "r": 81,
    "g": 189,
    "b": 230
  },
  "hsl": {
    "h": 196.51,
    "s": 74.874,
    "l": 60.98
  },
  "oklch": {
    "l": 0.75206,
    "c": 0.11404,
    "h": 226.5
  },
  "luminance": 0.43858
}

Semantic roles & 50–950 ramp

primary

#51BDE6

secondary

#E5BDAD

accent

#460ED7

background

#F9FCFE

surface

#F2F9FD

border

#CCD2D5

text

#0E1416

muted

#7E8284

Preview Lab

Preview with #51BDE6

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

Preview Lab → · Contrast checker → · Palette generator →