#51B1F2#51B1F2

#51B1F2 is a light, vivid cyan. Relative luminance 0.396; OKLCH L 73.0% C 0.131 H 241.4°. Best body text is #000000 at 8.92:1 contrast (WCAG AA passes).

Color values

HEX	#51B1F2
RGB	rgb(81, 177, 242)
HSL	hsl(204, 86%, 63%)
HSV	hsv(204, 67%, 95%)
CMYK	cmyk(66.5%, 26.9%, 0%, 5.1%)
CIE-LAB	lab(69.18, -8.33, -40.67)
CIE-LCH	lch(69.18, 41.52, 258.43°)
OKLab	oklab(73.02% -0.0625 -0.1146)
OKLCH	oklch(73.02% 0.131 241.4)
XYZ	xyz(35.1364, 39.6007, 89.7791)
Luminance	0.3960 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51B1F2 #F29251

analogous

#51F2E3 #51B1F2 #5160F2

triadic

#51B1F2 #F251B1 #B1F251

tetradic

#51B1F2 #E351F2 #F29251 #60F251

square

#51B1F2 #E351F2 #F29251 #60F251

split-complementary

#51B1F2 #F25160 #F2E351

monochromatic

#0E75BB #1897EE #51B1F2 #8ACBF6 #C3E4FB

Accessibility & contrast

On white

2.35

#51B1F2 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.92

#51B1F2 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51B1F2

8.92:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51B1F2	#FFFFFF	#000000	##000000
##51B1F2	1.00	2.35	8.92	8.92
#FFFFFF	2.35	1.00	21.00	21.00
#000000	8.92	21.00	1.00	1.00
##000000	8.92	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#93B2F5

Deuteranopia (green-blind)

#7DA2F1

Tritanopia (blue-blind)

#00C1C7

Achromatopsia (no color)

#A9A9A9

Design tokens & code

CSS

--color: #51b1f2;
/* rgb */ color: rgb(81, 177, 242);
/* oklch */ color: oklch(73.0% 0.131 241.4);

Tailwind

colors: {
  custom: {
    50: '#92c8f6',
    500: '#51b1f2',
    950: '#000000',
  },
}

SCSS

$custom: #51b1f2;
$custom-light: #92c8f6;
$custom-dark: #000000;

JSON

{
  "hex": "#51b1f2",
  "rgb": {
    "r": 81,
    "g": 177,
    "b": 242
  },
  "hsl": {
    "h": 204.224,
    "s": 86.096,
    "l": 63.333
  },
  "oklch": {
    "l": 0.73022,
    "c": 0.13058,
    "h": 241.4
  },
  "luminance": 0.39604
}

Semantic roles & 50–950 ramp

primary

#51B1F2

secondary

#ECCAB3

accent

#5D03E3

background

#F9FCFF

surface

#F2F8FE

border

#CCD1D6

text

#0E1317

muted

#7E8285

Preview Lab

Preview with #51B1F2

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

Preview Lab → · Contrast checker → · Palette generator →