#51B0DB#51B0DB

#51B0DB is a light, moderate cyan. Relative luminance 0.379; OKLCH L 71.7% C 0.109 H 230.5°. Best body text is #000000 at 8.58:1 contrast (WCAG AA passes).

Color values

HEX	#51B0DB
RGB	rgb(81, 176, 219)
HSL	hsl(199, 66%, 59%)
HSV	hsv(199, 63%, 86%)
CMYK	cmyk(63%, 19.6%, 0%, 14.1%)
CIE-LAB	lab(67.96, -15.13, -30.02)
CIE-LCH	lch(67.96, 33.61, 243.25°)
OKLab	oklab(71.74% -0.0692 -0.0839)
OKLCH	oklch(71.74% 0.109 230.5)
XYZ	xyz(31.6999, 37.9112, 72.6511)
Luminance	0.3791 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51B0DB #DB7C51

analogous

#51DBC1 #51B0DB #516BDB

triadic

#51B0DB #DB51B0 #B0DB51

tetradic

#51B0DB #C151DB #DB7C51 #6BDB51

square

#51B0DB #C151DB #DB7C51 #6BDB51

split-complementary

#51B0DB #DB516B #DBC151

monochromatic

#1E6F93 #2995C6 #51B0DB #84C7E5 #B6DEF0

Accessibility & contrast

On white

2.45

#51B0DB on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.58

#51B0DB on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51B0DB

8.58:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51B0DB	#FFFFFF	#000000	##000000
##51B0DB	1.00	2.45	8.58	8.58
#FFFFFF	2.45	1.00	21.00	21.00
#000000	8.58	21.00	1.00	1.00
##000000	8.58	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#9AAEDD

Deuteranopia (green-blind)

#879FDA

Tritanopia (blue-blind)

#00BCBE

Achromatopsia (no color)

#A6A6A6

Design tokens & code

CSS

--color: #51b0db;
/* rgb */ color: rgb(81, 176, 219);
/* oklch */ color: oklch(71.7% 0.109 230.5);

Tailwind

colors: {
  custom: {
    50: '#8fc7e6',
    500: '#51b0db',
    950: '#000000',
  },
}

SCSS

$custom: #51b0db;
$custom-light: #8fc7e6;
$custom-dark: #000000;

JSON

{
  "hex": "#51b0db",
  "rgb": {
    "r": 81,
    "g": 176,
    "b": 219
  },
  "hsl": {
    "h": 198.696,
    "s": 65.714,
    "l": 58.824
  },
  "oklch": {
    "l": 0.71735,
    "c": 0.10878,
    "h": 230.5
  },
  "luminance": 0.37914
}

Semantic roles & 50–950 ramp

primary

#51B0DB

secondary

#DFBAA9

accent

#743FE9

background

#F9FCFE

surface

#F2F8FC

border

#CCD1D5

text

#0E1316

muted

#7E8284

Preview Lab

Preview with #51B0DB

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

Preview Lab → · Contrast checker → · Palette generator →