#51C4E4#51C4E4

#51C4E4 is a light, moderate cyan. Relative luminance 0.468; OKLCH L 76.7% C 0.112 H 219.4°. Best body text is #000000 at 10.37:1 contrast (WCAG AA passes).

Color values

HEX	#51C4E4
RGB	rgb(81, 196, 228)
HSL	hsl(193, 73%, 61%)
HSV	hsv(193, 64%, 89%)
CMYK	cmyk(64.5%, 14%, 0%, 10.6%)
CIE-LAB	lab(74.08, -22.76, -25.51)
CIE-LCH	lch(74.08, 34.19, 228.27°)
OKLab	oklab(76.74% -0.0864 -0.0711)
OKLCH	oklch(76.74% 0.112 219.4)
XYZ	xyz(37.1312, 46.8266, 80.4653)
Luminance	0.4683 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51C4E4 #E47151

analogous

#51E4BA #51C4E4 #517AE4

triadic

#51C4E4 #E451C4 #C4E451

tetradic

#51C4E4 #BA51E4 #E47151 #7AE451

square

#51C4E4 #BA51E4 #E47151 #7AE451

split-complementary

#51C4E4 #E4517A #E4BA51

monochromatic

#1984A2 #21AFD7 #51C4E4 #86D6EC #BBE8F4

Accessibility & contrast

On white

2.03

#51C4E4 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

10.37

#51C4E4 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51C4E4

10.37:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51C4E4	#FFFFFF	#000000	##000000
##51C4E4	1.00	2.03	10.37	10.37
#FFFFFF	2.03	1.00	21.00	21.00
#000000	10.37	21.00	1.00	1.00
##000000	10.37	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#B0BFE6

Deuteranopia (green-blind)

#9BAFE4

Tritanopia (blue-blind)

#00CFCE

Achromatopsia (no color)

#B6B6B6

Design tokens & code

CSS

--color: #51c4e4;
/* rgb */ color: rgb(81, 196, 228);
/* oklch */ color: oklch(76.7% 0.112 219.4);

Tailwind

colors: {
  custom: {
    50: '#91d6ec',
    500: '#51c4e4',
    950: '#000000',
  },
}

SCSS

$custom: #51c4e4;
$custom-light: #91d6ec;
$custom-dark: #000000;

JSON

{
  "hex": "#51c4e4",
  "rgb": {
    "r": 81,
    "g": 196,
    "b": 228
  },
  "hsl": {
    "h": 193.061,
    "s": 73.134,
    "l": 60.588
  },
  "oklch": {
    "l": 0.76741,
    "c": 0.11187,
    "h": 219.4
  },
  "luminance": 0.46831
}

Semantic roles & 50–950 ramp

primary

#51C4E4

secondary

#E4B9AC

accent

#3B10D5

background

#F9FDFE

surface

#F2FAFD

border

#CCD3D5

text

#0E1416

muted

#7E8384

Preview Lab

Preview with #51C4E4

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

Preview Lab → · Contrast checker → · Palette generator →