#51B8F2#51B8F2

#51B8F2 is a light, vivid cyan. Relative luminance 0.424; OKLCH L 74.6% C 0.126 H 236.7°. Best body text is #000000 at 9.49:1 contrast (WCAG AA passes).

Color values

HEX	#51B8F2
RGB	rgb(81, 184, 242)
HSL	hsl(202, 86%, 63%)
HSV	hsv(202, 67%, 95%)
CMYK	cmyk(66.5%, 24%, 0%, 5.1%)
CIE-LAB	lab(71.17, -12.13, -37.58)
CIE-LCH	lch(71.17, 39.48, 252.11°)
OKLab	oklab(74.6% -0.0694 -0.1056)
OKLCH	oklch(74.6% 0.126 236.7)
XYZ	xyz(36.5546, 42.4372, 90.2519)
Luminance	0.4244 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51B8F2 #F28B51

analogous

#51F2DB #51B8F2 #5167F2

triadic

#51B8F2 #F251B8 #B8F251

tetradic

#51B8F2 #DB51F2 #F28B51 #67F251

square

#51B8F2 #DB51F2 #F28B51 #67F251

split-complementary

#51B8F2 #F25167 #F2DB51

monochromatic

#0E7CBB #18A1EE #51B8F2 #8ACFF6 #C3E6FB

Accessibility & contrast

On white

2.21

#51B8F2 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.49

#51B8F2 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51B8F2

9.49:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51B8F2	#FFFFFF	#000000	##000000
##51B8F2	1.00	2.21	9.49	9.49
#FFFFFF	2.21	1.00	21.00	21.00
#000000	9.49	21.00	1.00	1.00
##000000	9.49	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#9DB7F5

Deuteranopia (green-blind)

#86A7F1

Tritanopia (blue-blind)

#00C7CC

Achromatopsia (no color)

#AEAEAE

Design tokens & code

CSS

--color: #51b8f2;
/* rgb */ color: rgb(81, 184, 242);
/* oklch */ color: oklch(74.6% 0.126 236.7);

Tailwind

colors: {
  custom: {
    50: '#92cdf6',
    500: '#51b8f2',
    950: '#000000',
  },
}

SCSS

$custom: #51b8f2;
$custom-light: #92cdf6;
$custom-dark: #000000;

JSON

{
  "hex": "#51b8f2",
  "rgb": {
    "r": 81,
    "g": 184,
    "b": 242
  },
  "hsl": {
    "h": 201.615,
    "s": 86.096,
    "l": 63.333
  },
  "oklch": {
    "l": 0.74598,
    "c": 0.1264,
    "h": 236.7
  },
  "luminance": 0.42441
}

Semantic roles & 50–950 ramp

primary

#51B8F2

secondary

#ECC7B3

accent

#5303E3

background

#F9FCFF

surface

#F2F9FE

border

#CCD2D6

text

#0E1317

muted

#7E8285

Preview Lab

Preview with #51B8F2

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

Preview Lab → · Contrast checker → · Palette generator →