#51ACF2#51ACF2

#51ACF2 is a light, vivid cyan. Relative luminance 0.377; OKLCH L 71.9% C 0.134 H 244.5°. Best body text is #000000 at 8.53:1 contrast (WCAG AA passes).

Color values

HEX	#51ACF2
RGB	rgb(81, 172, 242)
HSL	hsl(206, 86%, 63%)
HSV	hsv(206, 67%, 95%)
CMYK	cmyk(66.5%, 28.9%, 0%, 5.1%)
CIE-LAB	lab(67.77, -5.56, -42.89)
CIE-LCH	lch(67.77, 43.25, 262.61°)
OKLab	oklab(71.91% -0.0576 -0.1211)
OKLCH	oklch(71.91% 0.134 244.5)
XYZ	xyz(34.1668, 37.6616, 89.4560)
Luminance	0.3766 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51ACF2 #F29751

analogous

#51F2E7 #51ACF2 #515BF2

triadic

#51ACF2 #F251AC #ACF251

tetradic

#51ACF2 #E751F2 #F29751 #5BF251

square

#51ACF2 #E751F2 #F29751 #5BF251

split-complementary

#51ACF2 #F2515B #F2E751

monochromatic

#0E70BB #1891EE #51ACF2 #8AC7F6 #C3E2FB

Accessibility & contrast

On white

2.46

#51ACF2 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.53

#51ACF2 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51ACF2

8.53:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51ACF2	#FFFFFF	#000000	##000000
##51ACF2	1.00	2.46	8.53	8.53
#FFFFFF	2.46	1.00	21.00	21.00
#000000	8.53	21.00	1.00	1.00
##000000	8.53	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#8DAEF5

Deuteranopia (green-blind)

#779EF1

Tritanopia (blue-blind)

#00BDC5

Achromatopsia (no color)

#A5A5A5

Design tokens & code

CSS

--color: #51acf2;
/* rgb */ color: rgb(81, 172, 242);
/* oklch */ color: oklch(71.9% 0.134 244.5);

Tailwind

colors: {
  custom: {
    50: '#92c4f6',
    500: '#51acf2',
    950: '#000000',
  },
}

SCSS

$custom: #51acf2;
$custom-light: #92c4f6;
$custom-dark: #000000;

JSON

{
  "hex": "#51acf2",
  "rgb": {
    "r": 81,
    "g": 172,
    "b": 242
  },
  "hsl": {
    "h": 206.087,
    "s": 86.096,
    "l": 63.333
  },
  "oklch": {
    "l": 0.71905,
    "c": 0.13411,
    "h": 244.5
  },
  "luminance": 0.37665
}

Semantic roles & 50–950 ramp

primary

#51ACF2

secondary

#ECCCB3

accent

#6403E3

background

#F9FCFF

surface

#F2F8FE

border

#CCD1D6

text

#0E1217

muted

#7E8185

Preview Lab

Preview with #51ACF2

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

Preview Lab → · Contrast checker → · Palette generator →