#51C4EE#51C4EE

#51C4EE is a light, moderate cyan. Relative luminance 0.474; OKLCH L 77.2% C 0.118 H 225.7°. Best body text is #000000 at 10.48:1 contrast (WCAG AA passes).

Color values

HEX	#51C4EE
RGB	rgb(81, 196, 238)
HSL	hsl(196, 82%, 63%)
HSV	hsv(196, 66%, 93%)
CMYK	cmyk(66%, 17.6%, 0%, 6.7%)
CIE-LAB	lab(74.44, -19.70, -30.35)
CIE-LCH	lch(74.44, 36.18, 237.01°)
OKLab	oklab(77.15% -0.0827 -0.0848)
OKLCH	oklch(77.15% 0.118 225.7)
XYZ	xyz(38.5597, 47.3981, 87.9889)
Luminance	0.4740 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51C4EE #EE7B51

analogous

#51EECA #51C4EE #5175EE

triadic

#51C4EE #EE51C4 #C4EE51

tetradic

#51C4EE #CA51EE #EE7B51 #75EE51

square

#51C4EE #CA51EE #EE7B51 #75EE51

split-complementary

#51C4EE #EE5175 #EECA51

monochromatic

#1188B3 #19B1E9 #51C4EE #89D7F3 #C1EAF9

Accessibility & contrast

On white

2.00

#51C4EE on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

10.48

#51C4EE on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51C4EE

10.48:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51C4EE	#FFFFFF	#000000	##000000
##51C4EE	1.00	2.00	10.48	10.48
#FFFFFF	2.00	1.00	21.00	21.00
#000000	10.48	21.00	1.00	1.00
##000000	10.48	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#ADC0F0

Deuteranopia (green-blind)

#97B0EE

Tritanopia (blue-blind)

#00D0D2

Achromatopsia (no color)

#B7B7B7

Design tokens & code

CSS

--color: #51c4ee;
/* rgb */ color: rgb(81, 196, 238);
/* oklch */ color: oklch(77.2% 0.118 225.7);

Tailwind

colors: {
  custom: {
    50: '#92d6f3',
    500: '#51c4ee',
    950: '#000000',
  },
}

SCSS

$custom: #51c4ee;
$custom-light: #92d6f3;
$custom-dark: #000000;

JSON

{
  "hex": "#51c4ee",
  "rgb": {
    "r": 81,
    "g": 196,
    "b": 238
  },
  "hsl": {
    "h": 196.051,
    "s": 82.199,
    "l": 62.549
  },
  "oklch": {
    "l": 0.77154,
    "c": 0.11847,
    "h": 225.7
  },
  "luminance": 0.47402
}

Semantic roles & 50–950 ramp

primary

#51C4EE

secondary

#EAC0B1

accent

#4107DF

background

#F9FDFE

surface

#F2FAFD

border

#CCD3D5

text

#0E1417

muted

#7E8385

Preview Lab

Preview with #51C4EE

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

Preview Lab → · Contrast checker → · Palette generator →