#51BCFF#51BCFF

#51BCFF is a light, vivid cyan. Relative luminance 0.449; OKLCH L 76.1% C 0.137 H 239.7°. Best body text is #000000 at 9.99:1 contrast (WCAG AA passes).

Color values

HEX	#51BCFF
RGB	rgb(81, 188, 255)
HSL	hsl(203, 100%, 66%)
HSV	hsv(203, 68%, 100%)
CMYK	cmyk(68.2%, 26.3%, 0%, 0%)
CIE-LAB	lab(72.85, -10.09, -41.99)
CIE-LCH	lch(72.85, 43.18, 256.49°)
OKLab	oklab(76.11% -0.0691 -0.1183)
OKLCH	oklch(76.11% 0.137 239.7)
XYZ	xyz(39.4196, 44.9315, 101.1835)
Luminance	0.4494 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51BCFF #FF9451

analogous

#51FFEB #51BCFF #5165FF

triadic

#51BCFF #FF51BC #BCFF51

tetradic

#51BCFF #EB51FF #FF9451 #65FF51

square

#51BCFF #EB51FF #FF9451 #65FF51

split-complementary

#51BCFF #FF5165 #FFEB51

monochromatic

#0083D6 #14A4FF #51BCFF #8ED4FF #CBEBFF

Accessibility & contrast

On white

2.10

#51BCFF on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.99

#51BCFF on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51BCFF

9.99:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51BCFF	#FFFFFF	#000000	##000000
##51BCFF	1.00	2.10	9.99	9.99
#FFFFFF	2.10	1.00	21.00	21.00
#000000	9.99	21.00	1.00	1.00
##000000	9.99	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#9DBCFF

Deuteranopia (green-blind)

#85ABFE

Tritanopia (blue-blind)

#00CDD3

Achromatopsia (no color)

#B3B3B3

Design tokens & code

CSS

--color: #51bcff;
/* rgb */ color: rgb(81, 188, 255);
/* oklch */ color: oklch(76.1% 0.137 239.7);

Tailwind

colors: {
  custom: {
    50: '#94d0ff',
    500: '#51bcff',
    950: '#000000',
  },
}

SCSS

$custom: #51bcff;
$custom-light: #94d0ff;
$custom-dark: #000000;

JSON

{
  "hex": "#51bcff",
  "rgb": {
    "r": 81,
    "g": 188,
    "b": 255
  },
  "hsl": {
    "h": 203.103,
    "s": 100,
    "l": 65.882
  },
  "oklch": {
    "l": 0.76107,
    "c": 0.13706,
    "h": 239.7
  },
  "luminance": 0.44936
}

Semantic roles & 50–950 ramp

primary

#51BCFF

secondary

#F3CFB9

accent

#5800E6

background

#F9FCFF

surface

#F2F9FF

border

#CCD2D7

text

#0F1318

muted

#7E8286

Preview Lab

Preview with #51BCFF

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

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