#51AFDB#51AFDB

#51AFDB is a light, moderate cyan. Relative luminance 0.375; OKLCH L 71.5% C 0.109 H 231.4°. Best body text is #000000 at 8.50:1 contrast (WCAG AA passes).

Color values

HEX	#51AFDB
RGB	rgb(81, 175, 219)
HSL	hsl(199, 66%, 59%)
HSV	hsv(199, 63%, 86%)
CMYK	cmyk(63%, 20.1%, 0%, 14.1%)
CIE-LAB	lab(67.67, -14.60, -30.46)
CIE-LCH	lch(67.67, 33.78, 244.40°)
OKLab	oklab(71.51% -0.0681 -0.0852)
OKLCH	oklch(71.51% 0.109 231.4)
XYZ	xyz(31.5045, 37.5205, 72.5860)
Luminance	0.3752 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51AFDB #DB7D51

analogous

#51DBC2 #51AFDB #516ADB

triadic

#51AFDB #DB51AF #AFDB51

tetradic

#51AFDB #C251DB #DB7D51 #6ADB51

square

#51AFDB #C251DB #DB7D51 #6ADB51

split-complementary

#51AFDB #DB516A #DBC251

monochromatic

#1E6E93 #2994C6 #51AFDB #84C6E5 #B6DEF0

Accessibility & contrast

On white

2.47

#51AFDB on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.50

#51AFDB on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51AFDB

8.50:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51AFDB	#FFFFFF	#000000	##000000
##51AFDB	1.00	2.47	8.50	8.50
#FFFFFF	2.47	1.00	21.00	21.00
#000000	8.50	21.00	1.00	1.00
##000000	8.50	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#99ADDD

Deuteranopia (green-blind)

#869FDA

Tritanopia (blue-blind)

#00BBBE

Achromatopsia (no color)

#A5A5A5

Design tokens & code

CSS

--color: #51afdb;
/* rgb */ color: rgb(81, 175, 219);
/* oklch */ color: oklch(71.5% 0.109 231.4);

Tailwind

colors: {
  custom: {
    50: '#8fc6e6',
    500: '#51afdb',
    950: '#000000',
  },
}

SCSS

$custom: #51afdb;
$custom-light: #8fc6e6;
$custom-dark: #000000;

JSON

{
  "hex": "#51afdb",
  "rgb": {
    "r": 81,
    "g": 175,
    "b": 219
  },
  "hsl": {
    "h": 199.13,
    "s": 65.714,
    "l": 58.824
  },
  "oklch": {
    "l": 0.71505,
    "c": 0.10913,
    "h": 231.4
  },
  "luminance": 0.37524
}

Semantic roles & 50–950 ramp

primary

#51AFDB

secondary

#DFBAA9

accent

#753FE9

background

#F9FCFE

surface

#F2F8FC

border

#CCD1D5

text

#0E1316

muted

#7E8284

Preview Lab

Preview with #51AFDB

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

Preview Lab → · Contrast checker → · Palette generator →