#51BDDE#51BDDE

#51BDDE is a light, moderate cyan. Relative luminance 0.434; OKLCH L 74.9% C 0.108 H 221.3°. Best body text is #000000 at 9.68:1 contrast (WCAG AA passes).

Color values

HEX	#51BDDE
RGB	rgb(81, 189, 222)
HSL	hsl(194, 68%, 59%)
HSV	hsv(194, 64%, 87%)
CMYK	cmyk(63.5%, 14.9%, 0%, 12.9%)
CIE-LAB	lab(71.84, -21.00, -25.69)
CIE-LCH	lch(71.84, 33.18, 230.73°)
OKLab	oklab(74.87% -0.0815 -0.0716)
OKLCH	oklch(74.87% 0.108 221.3)
XYZ	xyz(34.7704, 43.4148, 75.6405)
Luminance	0.4342 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51BDDE #DE7251

analogous

#51DEB9 #51BDDE #5176DE

triadic

#51BDDE #DE51BD #BDDE51

tetradic

#51BDDE #B951DE #DE7251 #76DE51

square

#51BDDE #B951DE #DE7251 #76DE51

split-complementary

#51BDDE #DE5176 #DEB951

monochromatic

#1D7B98 #27A5CB #51BDDE #84D1E8 #B8E4F2

Accessibility & contrast

On white

2.17

#51BDDE on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.68

#51BDDE on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51BDDE

9.68:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51BDDE	#FFFFFF	#000000	##000000
##51BDDE	1.00	2.17	9.68	9.68
#FFFFFF	2.17	1.00	21.00	21.00
#000000	9.68	21.00	1.00	1.00
##000000	9.68	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#A9B8E0

Deuteranopia (green-blind)

#95AADE

Tritanopia (blue-blind)

#00C8C7

Achromatopsia (no color)

#B0B0B0

Design tokens & code

CSS

--color: #51bdde;
/* rgb */ color: rgb(81, 189, 222);
/* oklch */ color: oklch(74.9% 0.108 221.3);

Tailwind

colors: {
  custom: {
    50: '#90d1e8',
    500: '#51bdde',
    950: '#000000',
  },
}

SCSS

$custom: #51bdde;
$custom-light: #90d1e8;
$custom-dark: #000000;

JSON

{
  "hex": "#51bdde",
  "rgb": {
    "r": 81,
    "g": 189,
    "b": 222
  },
  "hsl": {
    "h": 194.043,
    "s": 68.116,
    "l": 59.412
  },
  "oklch": {
    "l": 0.74873,
    "c": 0.10849,
    "h": 221.3
  },
  "luminance": 0.43418
}

Semantic roles & 50–950 ramp

primary

#51BDDE

secondary

#E1B7AA

accent

#663DEB

background

#F9FCFE

surface

#F2F9FC

border

#CCD2D5

text

#0E1416

muted

#7E8284

Preview Lab

Preview with #51BDDE

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

Preview Lab → · Contrast checker → · Palette generator →