#51B2F2#51B2F2

#51B2F2 is a light, vivid cyan. Relative luminance 0.400; OKLCH L 73.2% C 0.130 H 240.7°. Best body text is #000000 at 9.00:1 contrast (WCAG AA passes).

Color values

HEX	#51B2F2
RGB	rgb(81, 178, 242)
HSL	hsl(204, 86%, 63%)
HSV	hsv(204, 67%, 95%)
CMYK	cmyk(66.5%, 26.4%, 0%, 5.1%)
CIE-LAB	lab(69.47, -8.87, -40.23)
CIE-LCH	lch(69.47, 41.20, 257.56°)
OKLab	oklab(73.25% -0.0635 -0.1133)
OKLCH	oklch(73.25% 0.13 240.7)
XYZ	xyz(35.3346, 39.9972, 89.8452)
Luminance	0.4000 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51B2F2 #F29151

analogous

#51F2E1 #51B2F2 #5161F2

triadic

#51B2F2 #F251B2 #B2F251

tetradic

#51B2F2 #E151F2 #F29151 #61F251

square

#51B2F2 #E151F2 #F29151 #61F251

split-complementary

#51B2F2 #F25161 #F2E151

monochromatic

#0E76BB #1899EE #51B2F2 #8ACBF6 #C3E4FB

Accessibility & contrast

On white

2.33

#51B2F2 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.00

#51B2F2 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51B2F2

9.00:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51B2F2	#FFFFFF	#000000	##000000
##51B2F2	1.00	2.33	9.00	9.00
#FFFFFF	2.33	1.00	21.00	21.00
#000000	9.00	21.00	1.00	1.00
##000000	9.00	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#95B2F5

Deuteranopia (green-blind)

#7FA3F1

Tritanopia (blue-blind)

#00C2C8

Achromatopsia (no color)

#AAAAAA

Design tokens & code

CSS

--color: #51b2f2;
/* rgb */ color: rgb(81, 178, 242);
/* oklch */ color: oklch(73.2% 0.130 240.7);

Tailwind

colors: {
  custom: {
    50: '#92c8f6',
    500: '#51b2f2',
    950: '#000000',
  },
}

SCSS

$custom: #51b2f2;
$custom-light: #92c8f6;
$custom-dark: #000000;

JSON

{
  "hex": "#51b2f2",
  "rgb": {
    "r": 81,
    "g": 178,
    "b": 242
  },
  "hsl": {
    "h": 203.851,
    "s": 86.096,
    "l": 63.333
  },
  "oklch": {
    "l": 0.73247,
    "c": 0.12993,
    "h": 240.7
  },
  "luminance": 0.40001
}

Semantic roles & 50–950 ramp

primary

#51B2F2

secondary

#ECCAB3

accent

#5C03E3

background

#F9FCFF

surface

#F2F8FE

border

#CCD1D6

text

#0E1317

muted

#7E8285

Preview Lab

Preview with #51B2F2

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

Preview Lab → · Contrast checker → · Palette generator →