#51D9EC#51D9EC

#51D9EC is a light, moderate teal. Relative luminance 0.574; OKLCH L 81.9% C 0.118 H 208.2°. Best body text is #000000 at 12.49:1 contrast (WCAG AA passes).

Color values

HEX	#51D9EC
RGB	rgb(81, 217, 236)
HSL	hsl(187, 80%, 62%)
HSV	hsv(187, 66%, 93%)
CMYK	cmyk(65.7%, 8.1%, 0%, 7.5%)
CIE-LAB	lab(80.42, -30.75, -20.16)
CIE-LCH	lch(80.42, 36.77, 213.24°)
OKLab	oklab(81.93% -0.1043 -0.0559)
OKLCH	oklch(81.93% 0.118 208.2)
XYZ	xyz(43.3401, 57.4264, 88.1409)
Luminance	0.5743 (WCAG relative)
Temperature	cool
Family	teal

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51D9EC #EC6451

analogous

#51ECB2 #51D9EC #518BEC

triadic

#51D9EC #EC51D9 #D9EC51

tetradic

#51D9EC #B251EC #EC6451 #8BEC51

square

#51D9EC #B251EC #EC6451 #8BEC51

split-complementary

#51D9EC #EC518B #ECB251

monochromatic

#139CAF #1ACDE6 #51D9EC #88E5F2 #BFF1F8

Accessibility & contrast

On white

1.68

#51D9EC on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

12.49

#51D9EC on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51D9EC

12.49:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51D9EC	#FFFFFF	#000000	##000000
##51D9EC	1.00	1.68	12.49	12.49
#FFFFFF	1.68	1.00	21.00	21.00
#000000	12.49	21.00	1.00	1.00
##000000	12.49	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#C7D1ED

Deuteranopia (green-blind)

#B0C0EC

Tritanopia (blue-blind)

#00E2DF

Achromatopsia (no color)

#C7C7C7

Design tokens & code

CSS

--color: #51d9ec;
/* rgb */ color: rgb(81, 217, 236);
/* oklch */ color: oklch(81.9% 0.118 208.2);

Tailwind

colors: {
  custom: {
    50: '#94e5f2',
    500: '#51d9ec',
    950: '#000000',
  },
}

SCSS

$custom: #51d9ec;
$custom-light: #94e5f2;
$custom-dark: #000000;

JSON

{
  "hex": "#51d9ec",
  "rgb": {
    "r": 81,
    "g": 217,
    "b": 236
  },
  "hsl": {
    "h": 187.355,
    "s": 80.311,
    "l": 62.157
  },
  "oklch": {
    "l": 0.81929,
    "c": 0.11839,
    "h": 208.2
  },
  "luminance": 0.57431
}

Semantic roles & 50–950 ramp

primary

#51D9EC

secondary

#B04131

accent

#2309DD

background

#FCFEFF

surface

#F5FCFE

border

#CFD5D6

text

#0F1516

muted

#808485

Preview Lab

Preview with #51D9EC

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

Preview Lab → · Contrast checker → · Palette generator →