#51C4EB#51C4EB

#51C4EB is a light, moderate cyan. Relative luminance 0.472; OKLCH L 77.0% C 0.116 H 223.9°. Best body text is #000000 at 10.45:1 contrast (WCAG AA passes).

Color values

HEX	#51C4EB
RGB	rgb(81, 196, 235)
HSL	hsl(195, 79%, 62%)
HSV	hsv(195, 66%, 92%)
CMYK	cmyk(65.5%, 16.6%, 0%, 7.8%)
CIE-LAB	lab(74.33, -20.63, -28.90)
CIE-LCH	lch(74.33, 35.51, 234.49°)
OKLab	oklab(77.03% -0.0838 -0.0807)
OKLCH	oklch(77.03% 0.116 223.9)
XYZ	xyz(38.1226, 47.2232, 85.6870)
Luminance	0.4723 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51C4EB #EB7851

analogous

#51EBC5 #51C4EB #5177EB

triadic

#51C4EB #EB51C4 #C4EB51

tetradic

#51C4EB #C551EB #EB7851 #77EB51

square

#51C4EB #C551EB #EB7851 #77EB51

split-complementary

#51C4EB #EB5177 #EBC551

monochromatic

#1487AE #1AB1E5 #51C4EB #88D7F1 #BFE9F8

Accessibility & contrast

On white

2.01

#51C4EB on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

10.45

#51C4EB on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51C4EB

10.45:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51C4EB	#FFFFFF	#000000	##000000
##51C4EB	1.00	2.01	10.45	10.45
#FFFFFF	2.01	1.00	21.00	21.00
#000000	10.45	21.00	1.00	1.00
##000000	10.45	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#AEC0ED

Deuteranopia (green-blind)

#98B0EB

Tritanopia (blue-blind)

#00D0D1

Achromatopsia (no color)

#B7B7B7

Design tokens & code

CSS

--color: #51c4eb;
/* rgb */ color: rgb(81, 196, 235);
/* oklch */ color: oklch(77.0% 0.116 223.9);

Tailwind

colors: {
  custom: {
    50: '#92d6f1',
    500: '#51c4eb',
    950: '#000000',
  },
}

SCSS

$custom: #51c4eb;
$custom-light: #92d6f1;
$custom-dark: #000000;

JSON

{
  "hex": "#51c4eb",
  "rgb": {
    "r": 81,
    "g": 196,
    "b": 235
  },
  "hsl": {
    "h": 195.195,
    "s": 79.381,
    "l": 61.961
  },
  "oklch": {
    "l": 0.77028,
    "c": 0.11633,
    "h": 223.9
  },
  "luminance": 0.47227
}

Semantic roles & 50–950 ramp

primary

#51C4EB

secondary

#E8BEB0

accent

#3F0ADC

background

#F9FDFE

surface

#F2FAFD

border

#CCD3D5

text

#0E1416

muted

#7E8384

Preview Lab

Preview with #51C4EB

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

Preview Lab → · Contrast checker → · Palette generator →