#51BCDD#51BCDD

#51BCDD is a light, moderate cyan. Relative luminance 0.429; OKLCH L 74.6% C 0.108 H 221.5°. Best body text is #000000 at 9.59:1 contrast (WCAG AA passes).

Color values

HEX	#51BCDD
RGB	rgb(81, 188, 221)
HSL	hsl(194, 67%, 59%)
HSV	hsv(194, 63%, 87%)
CMYK	cmyk(63.3%, 14.9%, 0%, 13.3%)
CIE-LAB	lab(71.51, -20.79, -25.65)
CIE-LCH	lch(71.51, 33.02, 230.96°)
OKLab	oklab(74.6% -0.0809 -0.0714)
OKLCH	oklch(74.6% 0.108 221.5)
XYZ	xyz(34.4224, 42.9326, 74.8653)
Luminance	0.4294 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51BCDD #DD7251

analogous

#51DDB8 #51BCDD #5176DD

triadic

#51BCDD #DD51BC #BCDD51

tetradic

#51BCDD #B851DD #DD7251 #76DD51

square

#51BCDD #B851DD #DD7251 #76DD51

split-complementary

#51BCDD #DD5176 #DDB851

monochromatic

#1D7A96 #27A3C9 #51BCDD #84D0E7 #B7E3F1

Accessibility & contrast

On white

2.19

#51BCDD on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.59

#51BCDD on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51BCDD

9.59:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51BCDD	#FFFFFF	#000000	##000000
##51BCDD	1.00	2.19	9.59	9.59
#FFFFFF	2.19	1.00	21.00	21.00
#000000	9.59	21.00	1.00	1.00
##000000	9.59	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#A8B8DF

Deuteranopia (green-blind)

#94A9DD

Tritanopia (blue-blind)

#00C7C6

Achromatopsia (no color)

#AFAFAF

Design tokens & code

CSS

--color: #51bcdd;
/* rgb */ color: rgb(81, 188, 221);
/* oklch */ color: oklch(74.6% 0.108 221.5);

Tailwind

colors: {
  custom: {
    50: '#90d0e7',
    500: '#51bcdd',
    950: '#000000',
  },
}

SCSS

$custom: #51bcdd;
$custom-light: #90d0e7;
$custom-dark: #000000;

JSON

{
  "hex": "#51bcdd",
  "rgb": {
    "r": 81,
    "g": 188,
    "b": 221
  },
  "hsl": {
    "h": 194.143,
    "s": 67.308,
    "l": 59.216
  },
  "oklch": {
    "l": 0.74599,
    "c": 0.10791,
    "h": 221.5
  },
  "luminance": 0.42936
}

Semantic roles & 50–950 ramp

primary

#51BCDD

secondary

#E0B6AA

accent

#663EEA

background

#F9FCFE

surface

#F2F9FC

border

#CCD2D5

text

#0E1416

muted

#7E8284

Preview Lab

Preview with #51BCDD

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

Preview Lab → · Contrast checker → · Palette generator →