#51C8ED#51C8ED

#51C8ED is a light, moderate cyan. Relative luminance 0.492; OKLCH L 78.0% C 0.117 H 222.0°. Best body text is #000000 at 10.83:1 contrast (WCAG AA passes).

Color values

HEX	#51C8ED
RGB	rgb(81, 200, 237)
HSL	hsl(194, 81%, 62%)
HSV	hsv(194, 66%, 93%)
CMYK	cmyk(65.8%, 15.6%, 0%, 7.1%)
CIE-LAB	lab(75.56, -22.05, -28.10)
CIE-LCH	lch(75.56, 35.72, 231.88°)
OKLab	oklab(78.03% -0.087 -0.0784)
OKLCH	oklch(78.03% 0.117 222)
XYZ	xyz(39.3275, 49.1680, 87.5221)
Luminance	0.4917 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51C8ED #ED7651

analogous

#51EDC4 #51C8ED #517AED

triadic

#51C8ED #ED51C8 #C8ED51

tetradic

#51C8ED #C451ED #ED7651 #7AED51

square

#51C8ED #C451ED #ED7651 #7AED51

split-complementary

#51C8ED #ED517A #EDC451

monochromatic

#128CB1 #1AB6E7 #51C8ED #88DAF3 #C0EBF8

Accessibility & contrast

On white

1.94

#51C8ED on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

10.83

#51C8ED on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51C8ED

10.83:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51C8ED	#FFFFFF	#000000	##000000
##51C8ED	1.00	1.94	10.83	10.83
#FFFFFF	1.94	1.00	21.00	21.00
#000000	10.83	21.00	1.00	1.00
##000000	10.83	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#B2C3EF

Deuteranopia (green-blind)

#9CB3ED

Tritanopia (blue-blind)

#00D4D4

Achromatopsia (no color)

#BABABA

Design tokens & code

CSS

--color: #51c8ed;
/* rgb */ color: rgb(81, 200, 237);
/* oklch */ color: oklch(78.0% 0.117 222.0);

Tailwind

colors: {
  custom: {
    50: '#92d8f3',
    500: '#51c8ed',
    950: '#000000',
  },
}

SCSS

$custom: #51c8ed;
$custom-light: #92d8f3;
$custom-dark: #000000;

JSON

{
  "hex": "#51c8ed",
  "rgb": {
    "r": 81,
    "g": 200,
    "b": 237
  },
  "hsl": {
    "h": 194.231,
    "s": 81.25,
    "l": 62.353
  },
  "oklch": {
    "l": 0.78032,
    "c": 0.11716,
    "h": 222
  },
  "luminance": 0.49172
}

Semantic roles & 50–950 ramp

primary

#51C8ED

secondary

#E9BEB0

accent

#3B08DE

background

#F9FDFE

surface

#F2FAFD

border

#CCD3D5

text

#0E1417

muted

#7E8385

Preview Lab

Preview with #51C8ED

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

Preview Lab → · Contrast checker → · Palette generator →