#51BCDB#51BCDB

#51BCDB is a light, moderate cyan. Relative luminance 0.428; OKLCH L 74.5% C 0.107 H 220.1°. Best body text is #000000 at 9.57:1 contrast (WCAG AA passes).

Color values

HEX	#51BCDB
RGB	rgb(81, 188, 219)
HSL	hsl(193, 66%, 59%)
HSV	hsv(193, 63%, 86%)
CMYK	cmyk(63%, 14.2%, 0%, 14.1%)
CIE-LAB	lab(71.44, -21.40, -24.67)
CIE-LCH	lch(71.44, 32.66, 229.06°)
OKLab	oklab(74.52% -0.0816 -0.0687)
OKLCH	oklch(74.52% 0.107 220.1)
XYZ	xyz(34.1576, 42.8267, 73.4703)
Luminance	0.4283 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51BCDB #DB7051

analogous

#51DBB5 #51BCDB #5177DB

triadic

#51BCDB #DB51BC #BCDB51

tetradic

#51BCDB #B551DB #DB7051 #77DB51

square

#51BCDB #B551DB #DB7051 #77DB51

split-complementary

#51BCDB #DB5177 #DBB551

monochromatic

#1E7993 #29A3C6 #51BCDB #84D0E5 #B6E3F0

Accessibility & contrast

On white

2.20

#51BCDB on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.57

#51BCDB on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51BCDB

9.57:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51BCDB	#FFFFFF	#000000	##000000
##51BCDB	1.00	2.20	9.57	9.57
#FFFFFF	2.20	1.00	21.00	21.00
#000000	9.57	21.00	1.00	1.00
##000000	9.57	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#A9B7DD

Deuteranopia (green-blind)

#95A9DB

Tritanopia (blue-blind)

#00C6C6

Achromatopsia (no color)

#AFAFAF

Design tokens & code

CSS

--color: #51bcdb;
/* rgb */ color: rgb(81, 188, 219);
/* oklch */ color: oklch(74.5% 0.107 220.1);

Tailwind

colors: {
  custom: {
    50: '#90d0e6',
    500: '#51bcdb',
    950: '#000000',
  },
}

SCSS

$custom: #51bcdb;
$custom-light: #90d0e6;
$custom-dark: #000000;

JSON

{
  "hex": "#51bcdb",
  "rgb": {
    "r": 81,
    "g": 188,
    "b": 219
  },
  "hsl": {
    "h": 193.478,
    "s": 65.714,
    "l": 58.824
  },
  "oklch": {
    "l": 0.74518,
    "c": 0.10667,
    "h": 220.1
  },
  "luminance": 0.4283
}

Semantic roles & 50–950 ramp

primary

#51BCDB

secondary

#DFB5A9

accent

#653FE9

background

#F9FCFE

surface

#F2F9FC

border

#CCD2D5

text

#0E1416

muted

#7E8284

Preview Lab

Preview with #51BCDB

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

Preview Lab → · Contrast checker → · Palette generator →