#51BDFF#51BDFF

#51BDFF is a light, vivid cyan. Relative luminance 0.454; OKLCH L 76.3% C 0.136 H 239.1°. Best body text is #000000 at 10.07:1 contrast (WCAG AA passes).

Color values

HEX	#51BDFF
RGB	rgb(81, 189, 255)
HSL	hsl(203, 100%, 66%)
HSV	hsv(203, 68%, 100%)
CMYK	cmyk(68.2%, 25.9%, 0%, 0%)
CIE-LAB	lab(73.13, -10.63, -41.55)
CIE-LCH	lch(73.13, 42.88, 255.65°)
OKLab	oklab(76.33% -0.0701 -0.1171)
OKLCH	oklch(76.33% 0.136 239.1)
XYZ	xyz(39.6339, 45.3602, 101.2550)
Luminance	0.4536 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51BDFF #FF9351

analogous

#51FFEA #51BDFF #5166FF

triadic

#51BDFF #FF51BD #BDFF51

tetradic

#51BDFF #EA51FF #FF9351 #66FF51

square

#51BDFF #EA51FF #FF9351 #66FF51

split-complementary

#51BDFF #FF5166 #FFEA51

monochromatic

#0085D6 #14A6FF #51BDFF #8ED4FF #CBEBFF

Accessibility & contrast

On white

2.08

#51BDFF on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

10.07

#51BDFF on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51BDFF

10.07:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51BDFF	#FFFFFF	#000000	##000000
##51BDFF	1.00	2.08	10.07	10.07
#FFFFFF	2.08	1.00	21.00	21.00
#000000	10.07	21.00	1.00	1.00
##000000	10.07	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#9EBDFF

Deuteranopia (green-blind)

#86ACFE

Tritanopia (blue-blind)

#00CED4

Achromatopsia (no color)

#B4B4B4

Design tokens & code

CSS

--color: #51bdff;
/* rgb */ color: rgb(81, 189, 255);
/* oklch */ color: oklch(76.3% 0.136 239.1);

Tailwind

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

SCSS

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

JSON

{
  "hex": "#51bdff",
  "rgb": {
    "r": 81,
    "g": 189,
    "b": 255
  },
  "hsl": {
    "h": 202.759,
    "s": 100,
    "l": 65.882
  },
  "oklch": {
    "l": 0.7633,
    "c": 0.13644,
    "h": 239.1
  },
  "luminance": 0.45365
}

Semantic roles & 50–950 ramp

primary

#51BDFF

secondary

#F3CFB9

accent

#5700E6

background

#F9FCFF

surface

#F2F9FF

border

#CCD2D7

text

#0F1418

muted

#7E8286

Preview Lab

Preview with #51BDFF

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

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