#51C1DF#51C1DF

#51C1DF is a light, moderate cyan. Relative luminance 0.452; OKLCH L 75.8% C 0.109 H 218.6°. Best body text is #000000 at 10.04:1 contrast (WCAG AA passes).

Color values

HEX	#51C1DF
RGB	rgb(81, 193, 223)
HSL	hsl(193, 69%, 60%)
HSV	hsv(193, 64%, 87%)
CMYK	cmyk(63.7%, 13.5%, 0%, 12.5%)
CIE-LAB	lab(73.03, -22.74, -24.40)
CIE-LCH	lch(73.03, 33.36, 227.02°)
OKLab	oklab(75.84% -0.0852 -0.0679)
OKLCH	oklch(75.84% 0.109 218.6)
XYZ	xyz(35.7772, 45.2132, 76.6392)
Luminance	0.4522 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51C1DF #DF6F51

analogous

#51DFB6 #51C1DF #517ADF

triadic

#51C1DF #DF51C1 #C1DF51

tetradic

#51C1DF #B651DF #DF6F51 #7ADF51

square

#51C1DF #B651DF #DF6F51 #7ADF51

split-complementary

#51C1DF #DF517A #DFB651

monochromatic

#1C7F99 #26AACD #51C1DF #85D3E9 #B8E6F2

Accessibility & contrast

On white

2.09

#51C1DF on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

10.04

#51C1DF on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51C1DF

10.04:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51C1DF	#FFFFFF	#000000	##000000
##51C1DF	1.00	2.09	10.04	10.04
#FFFFFF	2.09	1.00	21.00	21.00
#000000	10.04	21.00	1.00	1.00
##000000	10.04	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#AEBCE1

Deuteranopia (green-blind)

#9AADDF

Tritanopia (blue-blind)

#00CBCA

Achromatopsia (no color)

#B3B3B3

Design tokens & code

CSS

--color: #51c1df;
/* rgb */ color: rgb(81, 193, 223);
/* oklch */ color: oklch(75.8% 0.109 218.6);

Tailwind

colors: {
  custom: {
    50: '#90d4e9',
    500: '#51c1df',
    950: '#000000',
  },
}

SCSS

$custom: #51c1df;
$custom-light: #90d4e9;
$custom-dark: #000000;

JSON

{
  "hex": "#51c1df",
  "rgb": {
    "r": 81,
    "g": 193,
    "b": 223
  },
  "hsl": {
    "h": 192.676,
    "s": 68.932,
    "l": 59.608
  },
  "oklch": {
    "l": 0.75843,
    "c": 0.109,
    "h": 218.6
  },
  "luminance": 0.45217
}

Semantic roles & 50–950 ramp

primary

#51C1DF

secondary

#E1B6AA

accent

#613CEC

background

#F9FDFE

surface

#F2FAFC

border

#CCD3D5

text

#0E1416

muted

#7E8384

Preview Lab

Preview with #51C1DF

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

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