#51C7DF#51C7DF

#51C7DF is a light, moderate cyan. Relative luminance 0.479; OKLCH L 77.2% C 0.110 H 213.5°. Best body text is #000000 at 10.58:1 contrast (WCAG AA passes).

Color values

HEX	#51C7DF
RGB	rgb(81, 199, 223)
HSL	hsl(190, 69%, 60%)
HSV	hsv(190, 64%, 87%)
CMYK	cmyk(63.7%, 10.8%, 0%, 12.5%)
CIE-LAB	lab(74.77, -25.76, -21.75)
CIE-LCH	lch(74.77, 33.71, 220.18°)
OKLab	oklab(77.24% -0.0914 -0.0604)
OKLCH	oklch(77.24% 0.11 213.5)
XYZ	xyz(37.1305, 47.9199, 77.0904)
Luminance	0.4792 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51C7DF #DF6951

analogous

#51DFB0 #51C7DF #5180DF

triadic

#51C7DF #DF51C7 #C7DF51

tetradic

#51C7DF #B051DF #DF6951 #80DF51

square

#51C7DF #B051DF #DF6951 #80DF51

split-complementary

#51C7DF #DF5180 #DFB051

monochromatic

#1C8499 #26B1CD #51C7DF #85D8E9 #B8E8F2

Accessibility & contrast

On white

1.98

#51C7DF on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

10.58

#51C7DF on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51C7DF

10.58:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51C7DF	#FFFFFF	#000000	##000000
##51C7DF	1.00	1.98	10.58	10.58
#FFFFFF	1.98	1.00	21.00	21.00
#000000	10.58	21.00	1.00	1.00
##000000	10.58	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#B5C1E0

Deuteranopia (green-blind)

#A0B1DF

Tritanopia (blue-blind)

#00D0CE

Achromatopsia (no color)

#B8B8B8

Design tokens & code

CSS

--color: #51c7df;
/* rgb */ color: rgb(81, 199, 223);
/* oklch */ color: oklch(77.2% 0.110 213.5);

Tailwind

colors: {
  custom: {
    50: '#91d8e9',
    500: '#51c7df',
    950: '#000000',
  },
}

SCSS

$custom: #51c7df;
$custom-light: #91d8e9;
$custom-dark: #000000;

JSON

{
  "hex": "#51c7df",
  "rgb": {
    "r": 81,
    "g": 199,
    "b": 223
  },
  "hsl": {
    "h": 190.141,
    "s": 68.932,
    "l": 59.608
  },
  "oklch": {
    "l": 0.77242,
    "c": 0.10955,
    "h": 213.5
  },
  "luminance": 0.47924
}

Semantic roles & 50–950 ramp

primary

#51C7DF

secondary

#E1B4AA

accent

#5A3CEC

background

#F9FDFE

surface

#F2FAFC

border

#CCD3D5

text

#0E1416

muted

#7E8384

Preview Lab

Preview with #51C7DF

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

Preview Lab → · Contrast checker → · Palette generator →