#51D1F2#51D1F2

#51D1F2 is a light, moderate cyan. Relative luminance 0.538; OKLCH L 80.3% C 0.120 H 218.2°. Best body text is #000000 at 11.75:1 contrast (WCAG AA passes).

Color values

HEX	#51D1F2
RGB	rgb(81, 209, 242)
HSL	hsl(192, 86%, 63%)
HSV	hsv(192, 67%, 95%)
CMYK	cmyk(66.5%, 13.6%, 0%, 5.1%)
CIE-LAB	lab(78.32, -25.07, -26.55)
CIE-LCH	lch(78.32, 36.51, 226.65°)
OKLab	oklab(80.31% -0.0941 -0.074)
OKLCH	oklch(80.31% 0.12 218.2)
XYZ	xyz(42.2142, 53.7564, 92.1384)
Luminance	0.5376 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51D1F2 #F27251

analogous

#51F2C2 #51D1F2 #5180F2

triadic

#51D1F2 #F251D1 #D1F251

tetradic

#51D1F2 #C251F2 #F27251 #80F251

square

#51D1F2 #C251F2 #F27251 #80F251

split-complementary

#51D1F2 #F25180 #F2C251

monochromatic

#0E97BB #18C2EE #51D1F2 #8AE0F6 #C3EFFB

Accessibility & contrast

On white

1.79

#51D1F2 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

11.75

#51D1F2 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51D1F2

11.75:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51D1F2	#FFFFFF	#000000	##000000
##51D1F2	1.00	1.79	11.75	11.75
#FFFFFF	1.79	1.00	21.00	21.00
#000000	11.75	21.00	1.00	1.00
##000000	11.75	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#BCCBF4

Deuteranopia (green-blind)

#A5BAF2

Tritanopia (blue-blind)

#00DCDB

Achromatopsia (no color)

#C2C2C2

Design tokens & code

CSS

--color: #51d1f2;
/* rgb */ color: rgb(81, 209, 242);
/* oklch */ color: oklch(80.3% 0.120 218.2);

Tailwind

colors: {
  custom: {
    50: '#94dff6',
    500: '#51d1f2',
    950: '#000000',
  },
}

SCSS

$custom: #51d1f2;
$custom-light: #94dff6;
$custom-dark: #000000;

JSON

{
  "hex": "#51d1f2",
  "rgb": {
    "r": 81,
    "g": 209,
    "b": 242
  },
  "hsl": {
    "h": 192.298,
    "s": 86.096,
    "l": 63.333
  },
  "oklch": {
    "l": 0.80308,
    "c": 0.11971,
    "h": 218.2
  },
  "luminance": 0.53761
}

Semantic roles & 50–950 ramp

primary

#51D1F2

secondary

#B94A2E

accent

#3103E3

background

#FCFEFF

surface

#F5FCFE

border

#CFD5D6

text

#0F1517

muted

#808485

Preview Lab

Preview with #51D1F2

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

Preview Lab → · Contrast checker → · Palette generator →