#51B2F5#51B2F5

#51B2F5 is a light, vivid cyan. Relative luminance 0.402; OKLCH L 73.4% C 0.133 H 242.0°. Best body text is #000000 at 9.04:1 contrast (WCAG AA passes).

Color values

HEX	#51B2F5
RGB	rgb(81, 178, 245)
HSL	hsl(205, 89%, 64%)
HSV	hsv(205, 67%, 96%)
CMYK	cmyk(66.9%, 27.3%, 0%, 3.9%)
CIE-LAB	lab(69.60, -7.90, -41.66)
CIE-LCH	lch(69.60, 42.40, 259.27°)
OKLab	oklab(73.39% -0.0626 -0.1175)
OKLCH	oklch(73.39% 0.133 242)
XYZ	xyz(35.7889, 40.1789, 92.2377)
Luminance	0.4018 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51B2F5 #F59451

analogous

#51F5E6 #51B2F5 #5160F5

triadic

#51B2F5 #F551B2 #B2F551

tetradic

#51B2F5 #E651F5 #F59451 #60F551

square

#51B2F5 #E651F5 #F59451 #60F551

split-complementary

#51B2F5 #F55160 #F5E651

monochromatic

#0B76C1 #1798F2 #51B2F5 #8BCCF8 #C5E5FC

Accessibility & contrast

On white

2.32

#51B2F5 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.04

#51B2F5 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51B2F5

9.04:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51B2F5	#FFFFFF	#000000	##000000
##51B2F5	1.00	2.32	9.04	9.04
#FFFFFF	2.32	1.00	21.00	21.00
#000000	9.04	21.00	1.00	1.00
##000000	9.04	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#94B3F8

Deuteranopia (green-blind)

#7DA3F4

Tritanopia (blue-blind)

#00C3C9

Achromatopsia (no color)

#AAAAAA

Design tokens & code

CSS

--color: #51b2f5;
/* rgb */ color: rgb(81, 178, 245);
/* oklch */ color: oklch(73.4% 0.133 242.0);

Tailwind

colors: {
  custom: {
    50: '#92c8f8',
    500: '#51b2f5',
    950: '#000000',
  },
}

SCSS

$custom: #51b2f5;
$custom-light: #92c8f8;
$custom-dark: #000000;

JSON

{
  "hex": "#51b2f5",
  "rgb": {
    "r": 81,
    "g": 178,
    "b": 245
  },
  "hsl": {
    "h": 204.512,
    "s": 89.13,
    "l": 63.922
  },
  "oklch": {
    "l": 0.73391,
    "c": 0.13311,
    "h": 242
  },
  "luminance": 0.40183
}

Semantic roles & 50–950 ramp

primary

#51B2F5

secondary

#EECCB4

accent

#5E00E6

background

#F9FCFF

surface

#F2F8FF

border

#CCD1D7

text

#0E1317

muted

#7E8285

Preview Lab

Preview with #51B2F5

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

Preview Lab → · Contrast checker → · Palette generator →