#51BBDF#51BBDF

#51BBDF is a light, moderate cyan. Relative luminance 0.426; OKLCH L 74.5% C 0.109 H 223.7°. Best body text is #000000 at 9.52:1 contrast (WCAG AA passes).

Color values

HEX	#51BBDF
RGB	rgb(81, 187, 223)
HSL	hsl(195, 69%, 60%)
HSV	hsv(195, 64%, 87%)
CMYK	cmyk(63.7%, 16.1%, 0%, 12.5%)
CIE-LAB	lab(71.29, -19.67, -27.07)
CIE-LCH	lch(71.29, 33.46, 234.00°)
OKLab	oklab(74.45% -0.0791 -0.0755)
OKLCH	oklch(74.45% 0.109 223.7)
XYZ	xyz(34.4776, 42.6141, 76.2061)
Luminance	0.4262 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51BBDF #DF7551

analogous

#51DFBC #51BBDF #5174DF

triadic

#51BBDF #DF51BB #BBDF51

tetradic

#51BBDF #BC51DF #DF7551 #74DF51

square

#51BBDF #BC51DF #DF7551 #74DF51

split-complementary

#51BBDF #DF5174 #DFBC51

monochromatic

#1C7A99 #26A3CD #51BBDF #85CFE9 #B8E3F2

Accessibility & contrast

On white

2.21

#51BBDF on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.52

#51BBDF on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51BBDF

9.52:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51BBDF	#FFFFFF	#000000	##000000
##51BBDF	1.00	2.21	9.52	9.52
#FFFFFF	2.21	1.00	21.00	21.00
#000000	9.52	21.00	1.00	1.00
##000000	9.52	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#A7B7E1

Deuteranopia (green-blind)

#93A8DF

Tritanopia (blue-blind)

#00C6C7

Achromatopsia (no color)

#AFAFAF

Design tokens & code

CSS

--color: #51bbdf;
/* rgb */ color: rgb(81, 187, 223);
/* oklch */ color: oklch(74.5% 0.109 223.7);

Tailwind

colors: {
  custom: {
    50: '#90cfe9',
    500: '#51bbdf',
    950: '#000000',
  },
}

SCSS

$custom: #51bbdf;
$custom-light: #90cfe9;
$custom-dark: #000000;

JSON

{
  "hex": "#51bbdf",
  "rgb": {
    "r": 81,
    "g": 187,
    "b": 223
  },
  "hsl": {
    "h": 195.211,
    "s": 68.932,
    "l": 59.608
  },
  "oklch": {
    "l": 0.7445,
    "c": 0.10934,
    "h": 223.7
  },
  "luminance": 0.42618
}

Semantic roles & 50–950 ramp

primary

#51BBDF

secondary

#E1B8AA

accent

#693CEC

background

#F9FCFE

surface

#F2F9FC

border

#CCD2D5

text

#0E1316

muted

#7E8284

Preview Lab

Preview with #51BBDF

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

Preview Lab → · Contrast checker → · Palette generator →