#51A8D7#51A8D7

#51A8D7 is a light, moderate cyan. Relative luminance 0.347; OKLCH L 69.7% C 0.108 H 234.9°. Best body text is #000000 at 7.93:1 contrast (WCAG AA passes).

Color values

HEX#51A8D7
RGBrgb(81, 168, 215)
HSLhsl(201, 63%, 58%)
HSVhsv(201, 62%, 84%)
CMYKcmyk(62.3%, 21.9%, 0%, 15.7%)
CIE-LABlab(65.48, -12.08, -31.64)
CIE-LCHlch(65.48, 33.87, 249.10°)
OKLaboklab(69.71% -0.0622 -0.0886)
OKLCHoklch(69.71% 0.108 234.9)
XYZxyz(29.6570, 34.6579, 69.4035)
Luminance0.3466 (WCAG relative)
Temperaturecool
Familycyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#51A8D7 #D78051
analogous
#51D7C3 #51A8D7 #5165D7
triadic
#51A8D7 #D751A8 #A8D751
tetradic
#51A8D7 #C351D7 #D78051 #65D751
square
#51A8D7 #C351D7 #D78051 #65D751
split-complementary
#51A8D7 #D75165 #D7C351
monochromatic
#20678D #2C8BBF #51A8D7 #83C1E2 #B5DAEE

Accessibility & contrast

On white

2.65
#51A8D7 on #FFFFFF
AA ✗AA large ✗AAA ✗

On black

7.93
#51A8D7 on #000000
AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51A8D7
7.93:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##51A8D7#FFFFFF#000000##000000
##51A8D71.002.657.937.93
#FFFFFF2.651.0021.0021.00
#0000007.9321.001.001.00
##0000007.9321.001.001.00

Color blindness preview

Protanopia (red-blind)
#92A7D9
Deuteranopia (green-blind)
#7F99D6
Tritanopia (blue-blind)
#00B4B8
Achromatopsia (no color)
#9F9F9F

Design tokens & code

CSS
--color: #51a8d7;
/* rgb */ color: rgb(81, 168, 215);
/* oklch */ color: oklch(69.7% 0.108 234.9);
Tailwind
colors: {
  custom: {
    50: '#8ec1e3',
    500: '#51a8d7',
    950: '#000000',
  },
}
SCSS
$custom: #51a8d7;
$custom-light: #8ec1e3;
$custom-dark: #000000;
JSON
{
  "hex": "#51a8d7",
  "rgb": {
    "r": 81,
    "g": 168,
    "b": 215
  },
  "hsl": {
    "h": 201.045,
    "s": 62.617,
    "l": 58.039
  },
  "oklch": {
    "l": 0.69714,
    "c": 0.10829,
    "h": 234.9
  },
  "luminance": 0.34661
}

Semantic roles & 50–950 ramp

primary
#51A8D7
secondary
#DDBAA7
accent
#7B42E6
background
#F9FBFD
surface
#F2F7FB
border
#CCD0D4
text
#0D1215
muted
#7E8183

Preview Lab

Preview with #51A8D7

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

Preview Lab → · Contrast checker → · Palette generator →

#51A8D7 Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva