#51ACE6#51ACE6

#51ACE6 is a light, vivid cyan. Relative luminance 0.370; OKLCH L 71.3% C 0.121 H 239.6°. Best body text is #000000 at 8.39:1 contrast (WCAG AA passes).

Color values

HEX	#51ACE6
RGB	rgb(81, 172, 230)
HSL	hsl(203, 75%, 61%)
HSV	hsv(203, 65%, 90%)
CMYK	cmyk(64.8%, 25.2%, 0%, 9.8%)
CIE-LAB	lab(67.25, -9.47, -37.14)
CIE-LCH	lch(67.25, 38.33, 255.69°)
OKLab	oklab(71.32% -0.0614 -0.1045)
OKLCH	oklch(71.32% 0.121 239.6)
XYZ	xyz(32.4233, 36.9642, 80.2736)
Luminance	0.3697 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#51ACE6 #E68B51

analogous

#51E6D6 #51ACE6 #5161E6

triadic

#51ACE6 #E651AC #ACE651

tetradic

#51ACE6 #D651E6 #E68B51 #61E651

square

#51ACE6 #D651E6 #E68B51 #61E651

split-complementary

#51ACE6 #E65161 #E6D651

monochromatic

#186EA5 #1F92DA #51ACE6 #87C6EE #BCDFF5

Accessibility & contrast

On white

2.50

#51ACE6 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

8.39

#51ACE6 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51ACE6

8.39:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##51ACE6	#FFFFFF	#000000	##000000
##51ACE6	1.00	2.50	8.39	8.39
#FFFFFF	2.50	1.00	21.00	21.00
#000000	8.39	21.00	1.00	1.00
##000000	8.39	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#91ACE9

Deuteranopia (green-blind)

#7D9DE5

Tritanopia (blue-blind)

#00BBC0

Achromatopsia (no color)

#A4A4A4

Design tokens & code

CSS

--color: #51ace6;
/* rgb */ color: rgb(81, 172, 230);
/* oklch */ color: oklch(71.3% 0.121 239.6);

Tailwind

colors: {
  custom: {
    50: '#90c4ee',
    500: '#51ace6',
    950: '#000000',
  },
}

SCSS

$custom: #51ace6;
$custom-light: #90c4ee;
$custom-dark: #000000;

JSON

{
  "hex": "#51ace6",
  "rgb": {
    "r": 81,
    "g": 172,
    "b": 230
  },
  "hsl": {
    "h": 203.356,
    "s": 74.874,
    "l": 60.98
  },
  "oklch": {
    "l": 0.71322,
    "c": 0.12115,
    "h": 239.6
  },
  "luminance": 0.36968
}

Semantic roles & 50–950 ramp

primary

#51ACE6

secondary

#E5C3AD

accent

#5D0ED7

background

#F9FCFE

surface

#F2F8FD

border

#CCD1D5

text

#0E1216

muted

#7E8184

Preview Lab

Preview with #51ACE6

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

Preview Lab → · Contrast checker → · Palette generator →