#51C1EB#51C1EB

#51C1EB is a light, moderate cyan. Relative luminance 0.459; OKLCH L 76.3% C 0.117 H 226.3°. Best body text is #000000 at 10.18:1 contrast (WCAG AA passes).

Color values

HEX	#51C1EB
RGB	rgb(81, 193, 235)
HSL	hsl(196, 79%, 62%)
HSV	hsv(196, 66%, 92%)
CMYK	cmyk(65.5%, 17.9%, 0%, 7.8%)
CIE-LAB	lab(73.47, -19.08, -30.23)
CIE-LCH	lch(73.47, 35.75, 237.74°)
OKLab	oklab(76.34% -0.0808 -0.0845)
OKLCH	oklch(76.34% 0.117 226.3)
XYZ	xyz(37.4527, 45.8834, 85.4637)
Luminance	0.4589 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51C1EB #EB7B51

analogous

#51EBC8 #51C1EB #5174EB

triadic

#51C1EB #EB51C1 #C1EB51

tetradic

#51C1EB #C851EB #EB7B51 #74EB51

square

#51C1EB #C851EB #EB7B51 #74EB51

split-complementary

#51C1EB #EB5174 #EBC851

monochromatic

#1484AE #1AADE5 #51C1EB #88D5F1 #BFE8F8

Accessibility & contrast

On white

2.06

#51C1EB on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

10.18

#51C1EB on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51C1EB

10.18:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51C1EB	#FFFFFF	#000000	##000000
##51C1EB	1.00	2.06	10.18	10.18
#FFFFFF	2.06	1.00	21.00	21.00
#000000	10.18	21.00	1.00	1.00
##000000	10.18	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#AABDED

Deuteranopia (green-blind)

#95AEEB

Tritanopia (blue-blind)

#00CDCF

Achromatopsia (no color)

#B4B4B4

Design tokens & code

CSS

--color: #51c1eb;
/* rgb */ color: rgb(81, 193, 235);
/* oklch */ color: oklch(76.3% 0.117 226.3);

Tailwind

colors: {
  custom: {
    50: '#92d3f1',
    500: '#51c1eb',
    950: '#000000',
  },
}

SCSS

$custom: #51c1eb;
$custom-light: #92d3f1;
$custom-dark: #000000;

JSON

{
  "hex": "#51c1eb",
  "rgb": {
    "r": 81,
    "g": 193,
    "b": 235
  },
  "hsl": {
    "h": 196.364,
    "s": 79.381,
    "l": 61.961
  },
  "oklch": {
    "l": 0.76339,
    "c": 0.1169,
    "h": 226.3
  },
  "luminance": 0.45887
}

Semantic roles & 50–950 ramp

primary

#51C1EB

secondary

#E8BFB0

accent

#430ADC

background

#F9FCFE

surface

#F2F9FD

border

#CCD2D5

text

#0E1416

muted

#7E8284

Preview Lab

Preview with #51C1EB

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

Preview Lab → · Contrast checker → · Palette generator →