#51BBF2#51BBF2

#51BBF2 is a light, vivid cyan. Relative luminance 0.437; OKLCH L 75.3% C 0.125 H 234.6°. Best body text is #000000 at 9.74:1 contrast (WCAG AA passes).

Color values

HEX	#51BBF2
RGB	rgb(81, 187, 242)
HSL	hsl(200, 86%, 63%)
HSV	hsv(200, 67%, 95%)
CMYK	cmyk(66.5%, 22.7%, 0%, 5.1%)
CIE-LAB	lab(72.03, -13.73, -36.25)
CIE-LCH	lch(72.03, 38.76, 249.25°)
OKLab	oklab(75.28% -0.0724 -0.1018)
OKLCH	oklch(75.28% 0.125 234.6)
XYZ	xyz(37.1844, 43.6968, 90.4618)
Luminance	0.4370 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51BBF2 #F28851

analogous

#51F2D8 #51BBF2 #516AF2

triadic

#51BBF2 #F251BB #BBF251

tetradic

#51BBF2 #D851F2 #F28851 #6AF251

square

#51BBF2 #D851F2 #F28851 #6AF251

split-complementary

#51BBF2 #F2516A #F2D851

monochromatic

#0E80BB #18A5EE #51BBF2 #8AD1F6 #C3E8FB

Accessibility & contrast

On white

2.16

#51BBF2 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.74

#51BBF2 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51BBF2

9.74:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51BBF2	#FFFFFF	#000000	##000000
##51BBF2	1.00	2.16	9.74	9.74
#FFFFFF	2.16	1.00	21.00	21.00
#000000	9.74	21.00	1.00	1.00
##000000	9.74	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#A0BAF5

Deuteranopia (green-blind)

#8AA9F1

Tritanopia (blue-blind)

#00C9CD

Achromatopsia (no color)

#B1B1B1

Design tokens & code

CSS

--color: #51bbf2;
/* rgb */ color: rgb(81, 187, 242);
/* oklch */ color: oklch(75.3% 0.125 234.6);

Tailwind

colors: {
  custom: {
    50: '#92cff6',
    500: '#51bbf2',
    950: '#000000',
  },
}

SCSS

$custom: #51bbf2;
$custom-light: #92cff6;
$custom-dark: #000000;

JSON

{
  "hex": "#51bbf2",
  "rgb": {
    "r": 81,
    "g": 187,
    "b": 242
  },
  "hsl": {
    "h": 200.497,
    "s": 86.096,
    "l": 63.333
  },
  "oklch": {
    "l": 0.75277,
    "c": 0.12489,
    "h": 234.6
  },
  "luminance": 0.43701
}

Semantic roles & 50–950 ramp

primary

#51BBF2

secondary

#ECC6B3

accent

#4F03E3

background

#F9FCFF

surface

#F2F9FE

border

#CCD2D6

text

#0E1317

muted

#7E8285

Preview Lab

Preview with #51BBF2

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

Preview Lab → · Contrast checker → · Palette generator →