#51B3F2#51B3F2

#51B3F2 is a light, vivid cyan. Relative luminance 0.404; OKLCH L 73.5% C 0.129 H 240.1°. Best body text is #000000 at 9.08:1 contrast (WCAG AA passes).

Color values

HEX	#51B3F2
RGB	rgb(81, 179, 242)
HSL	hsl(203, 86%, 63%)
HSV	hsv(203, 67%, 95%)
CMYK	cmyk(66.5%, 26%, 0%, 5.1%)
CIE-LAB	lab(69.75, -9.42, -39.79)
CIE-LCH	lch(69.75, 40.89, 256.68°)
OKLab	oklab(73.47% -0.0645 -0.1121)
OKLCH	oklch(73.47% 0.129 240.1)
XYZ	xyz(35.5343, 40.3966, 89.9118)
Luminance	0.4040 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51B3F2 #F29051

analogous

#51F2E0 #51B3F2 #5162F2

triadic

#51B3F2 #F251B3 #B3F251

tetradic

#51B3F2 #E051F2 #F29051 #62F251

square

#51B3F2 #E051F2 #F29051 #62F251

split-complementary

#51B3F2 #F25162 #F2E051

monochromatic

#0E77BB #189AEE #51B3F2 #8ACCF6 #C3E5FB

Accessibility & contrast

On white

2.31

#51B3F2 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.08

#51B3F2 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51B3F2

9.08:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51B3F2	#FFFFFF	#000000	##000000
##51B3F2	1.00	2.31	9.08	9.08
#FFFFFF	2.31	1.00	21.00	21.00
#000000	9.08	21.00	1.00	1.00
##000000	9.08	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#96B3F5

Deuteranopia (green-blind)

#80A3F1

Tritanopia (blue-blind)

#00C3C9

Achromatopsia (no color)

#AAAAAA

Design tokens & code

CSS

--color: #51b3f2;
/* rgb */ color: rgb(81, 179, 242);
/* oklch */ color: oklch(73.5% 0.129 240.1);

Tailwind

colors: {
  custom: {
    50: '#92c9f6',
    500: '#51b3f2',
    950: '#000000',
  },
}

SCSS

$custom: #51b3f2;
$custom-light: #92c9f6;
$custom-dark: #000000;

JSON

{
  "hex": "#51b3f2",
  "rgb": {
    "r": 81,
    "g": 179,
    "b": 242
  },
  "hsl": {
    "h": 203.478,
    "s": 86.096,
    "l": 63.333
  },
  "oklch": {
    "l": 0.73471,
    "c": 0.1293,
    "h": 240.1
  },
  "luminance": 0.404
}

Semantic roles & 50–950 ramp

primary

#51B3F2

secondary

#ECC9B3

accent

#5A03E3

background

#F9FCFF

surface

#F2F8FE

border

#CCD1D6

text

#0E1317

muted

#7E8285

Preview Lab

Preview with #51B3F2

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

Preview Lab → · Contrast checker → · Palette generator →