#51C1DB#51C1DB

#51C1DB is a light, moderate cyan. Relative luminance 0.450; OKLCH L 75.7% C 0.107 H 215.7°. Best body text is #000000 at 10.00:1 contrast (WCAG AA passes).

Color values

HEX	#51C1DB
RGB	rgb(81, 193, 219)
HSL	hsl(191, 66%, 59%)
HSV	hsv(191, 63%, 86%)
CMYK	cmyk(63%, 11.9%, 0%, 14.1%)
CIE-LAB	lab(72.89, -23.94, -22.45)
CIE-LCH	lch(72.89, 32.82, 223.15°)
OKLab	oklab(75.68% -0.0868 -0.0624)
OKLCH	oklch(75.68% 0.107 215.7)
XYZ	xyz(35.2442, 45.0000, 73.8326)
Luminance	0.4500 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51C1DB #DB6B51

analogous

#51DBB0 #51C1DB #517CDB

triadic

#51C1DB #DB51C1 #C1DB51

tetradic

#51C1DB #B051DB #DB6B51 #7CDB51

square

#51C1DB #B051DB #DB6B51 #7CDB51

split-complementary

#51C1DB #DB517C #DBB051

monochromatic

#1E7D93 #29A8C6 #51C1DB #84D3E5 #B6E5F0

Accessibility & contrast

On white

2.10

#51C1DB on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

10.00

#51C1DB on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51C1DB

10.00:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51C1DB	#FFFFFF	#000000	##000000
##51C1DB	1.00	2.10	10.00	10.00
#FFFFFF	2.10	1.00	21.00	21.00
#000000	10.00	21.00	1.00	1.00
##000000	10.00	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#AFBBDC

Deuteranopia (green-blind)

#9BADDB

Tritanopia (blue-blind)

#00CBC9

Achromatopsia (no color)

#B3B3B3

Design tokens & code

CSS

--color: #51c1db;
/* rgb */ color: rgb(81, 193, 219);
/* oklch */ color: oklch(75.7% 0.107 215.7);

Tailwind

colors: {
  custom: {
    50: '#90d4e6',
    500: '#51c1db',
    950: '#000000',
  },
}

SCSS

$custom: #51c1db;
$custom-light: #90d4e6;
$custom-dark: #000000;

JSON

{
  "hex": "#51c1db",
  "rgb": {
    "r": 81,
    "g": 193,
    "b": 219
  },
  "hsl": {
    "h": 191.304,
    "s": 65.714,
    "l": 58.824
  },
  "oklch": {
    "l": 0.75684,
    "c": 0.10689,
    "h": 215.7
  },
  "luminance": 0.45004
}

Semantic roles & 50–950 ramp

primary

#51C1DB

secondary

#DFB3A9

accent

#5F3FE9

background

#F9FDFE

surface

#F2FAFC

border

#CCD3D5

text

#0E1415

muted

#7E8384

Preview Lab

Preview with #51C1DB

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

Preview Lab → · Contrast checker → · Palette generator →