#51AFF1#51AFF1

#51AFF1 is a light, vivid cyan. Relative luminance 0.388; OKLCH L 72.5% C 0.131 H 242.3°. Best body text is #000000 at 8.75:1 contrast (WCAG AA passes).

Color values

HEX	#51AFF1
RGB	rgb(81, 175, 241)
HSL	hsl(205, 85%, 63%)
HSV	hsv(205, 66%, 95%)
CMYK	cmyk(66.4%, 27.4%, 0%, 5.5%)
CIE-LAB	lab(68.57, -7.55, -41.08)
CIE-LCH	lch(68.57, 41.77, 259.58°)
OKLab	oklab(72.53% -0.0609 -0.1158)
OKLCH	oklch(72.53% 0.131 242.3)
XYZ	xyz(34.5944, 38.7565, 88.8596)
Luminance	0.3876 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51AFF1 #F19351

analogous

#51F1E3 #51AFF1 #515FF1

triadic

#51AFF1 #F151AF #AFF151

tetradic

#51AFF1 #E351F1 #F19351 #5FF151

square

#51AFF1 #E351F1 #F19351 #5FF151

split-complementary

#51AFF1 #F1515F #F1E351

monochromatic

#0F73B9 #1895EC #51AFF1 #8AC9F6 #C2E3FA

Accessibility & contrast

On white

2.40

#51AFF1 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.75

#51AFF1 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51AFF1

8.75:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51AFF1	#FFFFFF	#000000	##000000
##51AFF1	1.00	2.40	8.75	8.75
#FFFFFF	2.40	1.00	21.00	21.00
#000000	8.75	21.00	1.00	1.00
##000000	8.75	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#91B0F4

Deuteranopia (green-blind)

#7BA0F0

Tritanopia (blue-blind)

#00BFC6

Achromatopsia (no color)

#A7A7A7

Design tokens & code

CSS

--color: #51aff1;
/* rgb */ color: rgb(81, 175, 241);
/* oklch */ color: oklch(72.5% 0.131 242.3);

Tailwind

colors: {
  custom: {
    50: '#92c6f6',
    500: '#51aff1',
    950: '#000000',
  },
}

SCSS

$custom: #51aff1;
$custom-light: #92c6f6;
$custom-dark: #000000;

JSON

{
  "hex": "#51aff1",
  "rgb": {
    "r": 81,
    "g": 175,
    "b": 241
  },
  "hsl": {
    "h": 204.75,
    "s": 85.106,
    "l": 63.137
  },
  "oklch": {
    "l": 0.72526,
    "c": 0.13086,
    "h": 242.3
  },
  "luminance": 0.3876
}

Semantic roles & 50–950 ramp

primary

#51AFF1

secondary

#ECCAB2

accent

#5F04E2

background

#F9FCFF

surface

#F2F8FE

border

#CCD1D6

text

#0E1317

muted

#7E8285

Preview Lab

Preview with #51AFF1

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

Preview Lab → · Contrast checker → · Palette generator →