#51C8F2#51C8F2

#51C8F2 is a light, vivid cyan. Relative luminance 0.495; OKLCH L 78.2% C 0.121 H 225.0°. Best body text is #000000 at 10.89:1 contrast (WCAG AA passes).

Color values

HEX	#51C8F2
RGB	rgb(81, 200, 242)
HSL	hsl(196, 86%, 63%)
HSV	hsv(196, 67%, 95%)
CMYK	cmyk(66.5%, 17.4%, 0%, 5.1%)
CIE-LAB	lab(75.74, -20.52, -30.51)
CIE-LCH	lch(75.74, 36.77, 236.08°)
OKLab	oklab(78.24% -0.0852 -0.0853)
OKLCH	oklch(78.24% 0.121 225)
XYZ	xyz(40.0682, 49.4643, 91.4231)
Luminance	0.4947 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51C8F2 #F27B51

analogous

#51F2CB #51C8F2 #5177F2

triadic

#51C8F2 #F251C8 #C8F251

tetradic

#51C8F2 #CB51F2 #F27B51 #77F251

square

#51C8F2 #CB51F2 #F27B51 #77F251

split-complementary

#51C8F2 #F25177 #F2CB51

monochromatic

#0E8EBB #18B6EE #51C8F2 #8ADAF6 #C3ECFB

Accessibility & contrast

On white

1.93

#51C8F2 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

10.89

#51C8F2 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51C8F2

10.89:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51C8F2	#FFFFFF	#000000	##000000
##51C8F2	1.00	1.93	10.89	10.89
#FFFFFF	1.93	1.00	21.00	21.00
#000000	10.89	21.00	1.00	1.00
##000000	10.89	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#B1C4F4

Deuteranopia (green-blind)

#9AB3F2

Tritanopia (blue-blind)

#00D5D6

Achromatopsia (no color)

#BBBBBB

Design tokens & code

CSS

--color: #51c8f2;
/* rgb */ color: rgb(81, 200, 242);
/* oklch */ color: oklch(78.2% 0.121 225.0);

Tailwind

colors: {
  custom: {
    50: '#93d8f6',
    500: '#51c8f2',
    950: '#000000',
  },
}

SCSS

$custom: #51c8f2;
$custom-light: #93d8f6;
$custom-dark: #000000;

JSON

{
  "hex": "#51c8f2",
  "rgb": {
    "r": 81,
    "g": 200,
    "b": 242
  },
  "hsl": {
    "h": 195.652,
    "s": 86.096,
    "l": 63.333
  },
  "oklch": {
    "l": 0.7824,
    "c": 0.12055,
    "h": 225
  },
  "luminance": 0.49469
}

Semantic roles & 50–950 ramp

primary

#51C8F2

secondary

#ECC2B3

accent

#3D03E3

background

#F9FDFF

surface

#F2FAFE

border

#CCD3D6

text

#0E1417

muted

#7E8385

Preview Lab

Preview with #51C8F2

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

Preview Lab → · Contrast checker → · Palette generator →