#51B2DB#51B2DB

#51B2DB is a light, moderate cyan. Relative luminance 0.387; OKLCH L 72.2% C 0.108 H 228.8°. Best body text is #000000 at 8.74:1 contrast (WCAG AA passes).

Color values

HEX	#51B2DB
RGB	rgb(81, 178, 219)
HSL	hsl(198, 66%, 59%)
HSV	hsv(198, 63%, 86%)
CMYK	cmyk(63%, 18.7%, 0%, 14.1%)
CIE-LAB	lab(68.53, -16.19, -29.12)
CIE-LCH	lch(68.53, 33.32, 240.92°)
OKLab	oklab(72.2% -0.0713 -0.0814)
OKLCH	oklch(72.2% 0.108 228.8)
XYZ	xyz(32.0949, 38.7013, 72.7828)
Luminance	0.3871 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51B2DB #DB7A51

analogous

#51DBBF #51B2DB #516DDB

triadic

#51B2DB #DB51B2 #B2DB51

tetradic

#51B2DB #BF51DB #DB7A51 #6DDB51

square

#51B2DB #BF51DB #DB7A51 #6DDB51

split-complementary

#51B2DB #DB516D #DBBF51

monochromatic

#1E7093 #2997C6 #51B2DB #84C8E5 #B6DFF0

Accessibility & contrast

On white

2.40

#51B2DB on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.74

#51B2DB on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51B2DB

8.74:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51B2DB	#FFFFFF	#000000	##000000
##51B2DB	1.00	2.40	8.74	8.74
#FFFFFF	2.40	1.00	21.00	21.00
#000000	8.74	21.00	1.00	1.00
##000000	8.74	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#9DAFDD

Deuteranopia (green-blind)

#89A1DA

Tritanopia (blue-blind)

#00BEBF

Achromatopsia (no color)

#A7A7A7

Design tokens & code

CSS

--color: #51b2db;
/* rgb */ color: rgb(81, 178, 219);
/* oklch */ color: oklch(72.2% 0.108 228.8);

Tailwind

colors: {
  custom: {
    50: '#8fc9e6',
    500: '#51b2db',
    950: '#000000',
  },
}

SCSS

$custom: #51b2db;
$custom-light: #8fc9e6;
$custom-dark: #000000;

JSON

{
  "hex": "#51b2db",
  "rgb": {
    "r": 81,
    "g": 178,
    "b": 219
  },
  "hsl": {
    "h": 197.826,
    "s": 65.714,
    "l": 58.824
  },
  "oklch": {
    "l": 0.72197,
    "c": 0.10818,
    "h": 228.8
  },
  "luminance": 0.38705
}

Semantic roles & 50–950 ramp

primary

#51B2DB

secondary

#DFB9A9

accent

#723FE9

background

#F9FCFE

surface

#F2F8FC

border

#CCD1D5

text

#0E1316

muted

#7E8284

Preview Lab

Preview with #51B2DB

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

Preview Lab → · Contrast checker → · Palette generator →