#51C0DF#51C0DF

#51C0DF is a light, moderate cyan. Relative luminance 0.448; OKLCH L 75.6% C 0.109 H 219.4°. Best body text is #000000 at 9.96:1 contrast (WCAG AA passes).

Color values

HEX	#51C0DF
RGB	rgb(81, 192, 223)
HSL	hsl(193, 69%, 60%)
HSV	hsv(193, 64%, 87%)
CMYK	cmyk(63.7%, 13.9%, 0%, 12.5%)
CIE-LAB	lab(72.74, -22.24, -24.85)
CIE-LCH	lch(72.74, 33.34, 228.18°)
OKLab	oklab(75.61% -0.0842 -0.0692)
OKLCH	oklch(75.61% 0.109 219.4)
XYZ	xyz(35.5569, 44.7726, 76.5658)
Luminance	0.4478 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51C0DF #DF7051

analogous

#51DFB7 #51C0DF #5179DF

triadic

#51C0DF #DF51C0 #C0DF51

tetradic

#51C0DF #B751DF #DF7051 #79DF51

square

#51C0DF #B751DF #DF7051 #79DF51

split-complementary

#51C0DF #DF5179 #DFB751

monochromatic

#1C7E99 #26A9CD #51C0DF #85D3E9 #B8E5F2

Accessibility & contrast

On white

2.11

#51C0DF on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.96

#51C0DF on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51C0DF

9.96:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51C0DF	#FFFFFF	#000000	##000000
##51C0DF	1.00	2.11	9.96	9.96
#FFFFFF	2.11	1.00	21.00	21.00
#000000	9.96	21.00	1.00	1.00
##000000	9.96	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#ADBBE1

Deuteranopia (green-blind)

#98ACDF

Tritanopia (blue-blind)

#00CACA

Achromatopsia (no color)

#B2B2B2

Design tokens & code

CSS

--color: #51c0df;
/* rgb */ color: rgb(81, 192, 223);
/* oklch */ color: oklch(75.6% 0.109 219.4);

Tailwind

colors: {
  custom: {
    50: '#90d3e9',
    500: '#51c0df',
    950: '#000000',
  },
}

SCSS

$custom: #51c0df;
$custom-light: #90d3e9;
$custom-dark: #000000;

JSON

{
  "hex": "#51c0df",
  "rgb": {
    "r": 81,
    "g": 192,
    "b": 223
  },
  "hsl": {
    "h": 193.099,
    "s": 68.932,
    "l": 59.608
  },
  "oklch": {
    "l": 0.75611,
    "c": 0.10899,
    "h": 219.4
  },
  "luminance": 0.44776
}

Semantic roles & 50–950 ramp

primary

#51C0DF

secondary

#E1B6AA

accent

#623CEC

background

#F9FCFE

surface

#F2F9FC

border

#CCD2D5

text

#0E1416

muted

#7E8284

Preview Lab

Preview with #51C0DF

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

Preview Lab → · Contrast checker → · Palette generator →