#51BDDB#51BDDB

#51BDDB is a light, moderate cyan. Relative luminance 0.433; OKLCH L 74.8% C 0.107 H 219.2°. Best body text is #000000 at 9.65:1 contrast (WCAG AA passes).

Color values

HEX	#51BDDB
RGB	rgb(81, 189, 219)
HSL	hsl(193, 66%, 59%)
HSV	hsv(193, 63%, 86%)
CMYK	cmyk(63%, 13.7%, 0%, 14.1%)
CIE-LAB	lab(71.73, -21.91, -24.22)
CIE-LCH	lch(71.73, 32.66, 227.87°)
OKLab	oklab(74.75% -0.0827 -0.0674)
OKLCH	oklch(74.75% 0.107 219.2)
XYZ	xyz(34.3719, 43.2554, 73.5418)
Luminance	0.4326 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51BDDB #DB6F51

analogous

#51DBB4 #51BDDB #5178DB

triadic

#51BDDB #DB51BD #BDDB51

tetradic

#51BDDB #B451DB #DB6F51 #78DB51

square

#51BDDB #B451DB #DB6F51 #78DB51

split-complementary

#51BDDB #DB5178 #DBB451

monochromatic

#1E7A93 #29A4C6 #51BDDB #84D0E5 #B6E3F0

Accessibility & contrast

On white

2.18

#51BDDB on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.65

#51BDDB on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51BDDB

9.65:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51BDDB	#FFFFFF	#000000	##000000
##51BDDB	1.00	2.18	9.65	9.65
#FFFFFF	2.18	1.00	21.00	21.00
#000000	9.65	21.00	1.00	1.00
##000000	9.65	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#AAB8DD

Deuteranopia (green-blind)

#96A9DB

Tritanopia (blue-blind)

#00C7C6

Achromatopsia (no color)

#B0B0B0

Design tokens & code

CSS

--color: #51bddb;
/* rgb */ color: rgb(81, 189, 219);
/* oklch */ color: oklch(74.8% 0.107 219.2);

Tailwind

colors: {
  custom: {
    50: '#90d1e6',
    500: '#51bddb',
    950: '#000000',
  },
}

SCSS

$custom: #51bddb;
$custom-light: #90d1e6;
$custom-dark: #000000;

JSON

{
  "hex": "#51bddb",
  "rgb": {
    "r": 81,
    "g": 189,
    "b": 219
  },
  "hsl": {
    "h": 193.043,
    "s": 65.714,
    "l": 58.824
  },
  "oklch": {
    "l": 0.74751,
    "c": 0.10667,
    "h": 219.2
  },
  "luminance": 0.43259
}

Semantic roles & 50–950 ramp

primary

#51BDDB

secondary

#DFB5A9

accent

#643FE9

background

#F9FCFE

surface

#F2F9FC

border

#CCD2D5

text

#0E1416

muted

#7E8284

Preview Lab

Preview with #51BDDB

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

Preview Lab → · Contrast checker → · Palette generator →