#51A3E6#51A3E6

#51A3E6 is a light, vivid cyan. Relative luminance 0.337; OKLCH L 69.3% C 0.127 H 245.8°. Best body text is #000000 at 7.73:1 contrast (WCAG AA passes).

Color values

HEX#51A3E6
RGBrgb(81, 163, 230)
HSLhsl(207, 75%, 61%)
HSVhsv(207, 65%, 90%)
CMYKcmyk(64.8%, 29.1%, 0%, 9.8%)
CIE-LABlab(64.69, -4.47, -41.15)
CIE-LCHlch(64.69, 41.39, 263.79°)
OKLaboklab(69.3% -0.0523 -0.1161)
OKLCHoklch(69.3% 0.127 245.8)
XYZxyz(30.7681, 33.6538, 79.7219)
Luminance0.3366 (WCAG relative)
Temperaturecool
Familycyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#51A3E6 #E69451
analogous
#51E6DE #51A3E6 #5158E6
triadic
#51A3E6 #E651A3 #A3E651
tetradic
#51A3E6 #DE51E6 #E69451 #58E651
square
#51A3E6 #DE51E6 #E69451 #58E651
split-complementary
#51A3E6 #E65158 #E6DE51
monochromatic
#1865A5 #1F86DA #51A3E6 #87BFEE #BCDCF5

Accessibility & contrast

On white

2.72
#51A3E6 on #FFFFFF
AA ✗AA large ✗AAA ✗

On black

7.73
#51A3E6 on #000000
AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51A3E6
7.73:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##51A3E6#FFFFFF#000000##000000
##51A3E61.002.727.737.73
#FFFFFF2.721.0021.0021.00
#0000007.7321.001.001.00
##0000007.7321.001.001.00

Color blindness preview

Protanopia (red-blind)
#85A5E9
Deuteranopia (green-blind)
#7196E5
Tritanopia (blue-blind)
#00B3BB
Achromatopsia (no color)
#9D9D9D

Design tokens & code

CSS
--color: #51a3e6;
/* rgb */ color: rgb(81, 163, 230);
/* oklch */ color: oklch(69.3% 0.127 245.8);
Tailwind
colors: {
  custom: {
    50: '#90beee',
    500: '#51a3e6',
    950: '#000000',
  },
}
SCSS
$custom: #51a3e6;
$custom-light: #90beee;
$custom-dark: #000000;
JSON
{
  "hex": "#51a3e6",
  "rgb": {
    "r": 81,
    "g": 163,
    "b": 230
  },
  "hsl": {
    "h": 206.98,
    "s": 74.874,
    "l": 60.98
  },
  "oklch": {
    "l": 0.69295,
    "c": 0.12734,
    "h": 245.8
  },
  "luminance": 0.33657
}

Semantic roles & 50–950 ramp

primary
#51A3E6
secondary
#E5C7AD
accent
#690ED7
background
#F9FBFE
surface
#F2F6FD
border
#CCD0D5
text
#0E1216
muted
#7E8184

Preview Lab

Preview with #51A3E6

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

Preview Lab → · Contrast checker → · Palette generator →

#51A3E6 Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva