#51C8EC#51C8EC

#51C8EC is a light, moderate cyan. Relative luminance 0.491; OKLCH L 78.0% C 0.117 H 221.4°. Best body text is #000000 at 10.82:1 contrast (WCAG AA passes).

Color values

HEX	#51C8EC
RGB	rgb(81, 200, 236)
HSL	hsl(194, 80%, 62%)
HSV	hsv(194, 66%, 93%)
CMYK	cmyk(65.7%, 15.3%, 0%, 7.5%)
CIE-LAB	lab(75.52, -22.36, -27.62)
CIE-LCH	lch(75.52, 35.54, 231.01°)
OKLab	oklab(77.99% -0.0874 -0.077)
OKLCH	oklch(77.99% 0.117 221.4)
XYZ	xyz(39.1818, 49.1098, 86.7548)
Luminance	0.4911 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51C8EC #EC7551

analogous

#51ECC2 #51C8EC #517BEC

triadic

#51C8EC #EC51C8 #C8EC51

tetradic

#51C8EC #C251EC #EC7551 #7BEC51

square

#51C8EC #C251EC #EC7551 #7BEC51

split-complementary

#51C8EC #EC517B #ECC251

monochromatic

#138BAF #1AB7E6 #51C8EC #88D9F2 #BFEBF8

Accessibility & contrast

On white

1.94

#51C8EC on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

10.82

#51C8EC on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51C8EC

10.82:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51C8EC	#FFFFFF	#000000	##000000
##51C8EC	1.00	1.94	10.82	10.82
#FFFFFF	1.94	1.00	21.00	21.00
#000000	10.82	21.00	1.00	1.00
##000000	10.82	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#B3C3EE

Deuteranopia (green-blind)

#9DB3EC

Tritanopia (blue-blind)

#00D4D3

Achromatopsia (no color)

#BABABA

Design tokens & code

CSS

--color: #51c8ec;
/* rgb */ color: rgb(81, 200, 236);
/* oklch */ color: oklch(78.0% 0.117 221.4);

Tailwind

colors: {
  custom: {
    50: '#92d9f2',
    500: '#51c8ec',
    950: '#000000',
  },
}

SCSS

$custom: #51c8ec;
$custom-light: #92d9f2;
$custom-dark: #000000;

JSON

{
  "hex": "#51c8ec",
  "rgb": {
    "r": 81,
    "g": 200,
    "b": 236
  },
  "hsl": {
    "h": 193.935,
    "s": 80.311,
    "l": 62.157
  },
  "oklch": {
    "l": 0.77991,
    "c": 0.11652,
    "h": 221.4
  },
  "luminance": 0.49114
}

Semantic roles & 50–950 ramp

primary

#51C8EC

secondary

#E9BDB0

accent

#3A09DD

background

#F9FDFE

surface

#F2FAFD

border

#CCD3D5

text

#0E1417

muted

#7E8385

Preview Lab

Preview with #51C8EC

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

Preview Lab → · Contrast checker → · Palette generator →