#51A3DF#51A3DF

#51A3DF is a light, moderate cyan. Relative luminance 0.333; OKLCH L 69.0% C 0.119 H 242.9°. Best body text is #000000 at 7.65:1 contrast (WCAG AA passes).

Color values

HEX#51A3DF
RGBrgb(81, 163, 223)
HSLhsl(205, 69%, 60%)
HSVhsv(205, 64%, 87%)
CMYKcmyk(63.7%, 26.9%, 0%, 12.5%)
CIE-LABlab(64.38, -6.76, -37.77)
CIE-LCHlch(64.38, 38.37, 259.85°)
OKLaboklab(68.95% -0.0544 -0.1063)
OKLCHoklch(68.95% 0.119 242.9)
XYZxyz(29.8048, 33.2684, 74.6485)
Luminance0.3327 (WCAG relative)
Temperaturecool
Familycyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#51A3DF #DF8D51
analogous
#51DFD4 #51A3DF #515CDF
triadic
#51A3DF #DF51A3 #A3DF51
tetradic
#51A3DF #D451DF #DF8D51 #5CDF51
square
#51A3DF #D451DF #DF8D51 #5CDF51
split-complementary
#51A3DF #DF515C #DFD451
monochromatic
#1C6499 #2686CD #51A3DF #85BEE9 #B8DAF2

Accessibility & contrast

On white

2.74
#51A3DF on #FFFFFF
AA ✗AA large ✗AAA ✗

On black

7.65
#51A3DF on #000000
AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51A3DF
7.65:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##51A3DF#FFFFFF#000000##000000
##51A3DF1.002.747.657.65
#FFFFFF2.741.0021.0021.00
#0000007.6521.001.001.00
##0000007.6521.001.001.00

Color blindness preview

Protanopia (red-blind)
#88A4E2
Deuteranopia (green-blind)
#7596DE
Tritanopia (blue-blind)
#00B2B8
Achromatopsia (no color)
#9C9C9C

Design tokens & code

CSS
--color: #51a3df;
/* rgb */ color: rgb(81, 163, 223);
/* oklch */ color: oklch(69.0% 0.119 242.9);
Tailwind
colors: {
  custom: {
    50: '#8fbee9',
    500: '#51a3df',
    950: '#000000',
  },
}
SCSS
$custom: #51a3df;
$custom-light: #8fbee9;
$custom-dark: #000000;
JSON
{
  "hex": "#51a3df",
  "rgb": {
    "r": 81,
    "g": 163,
    "b": 223
  },
  "hsl": {
    "h": 205.352,
    "s": 68.932,
    "l": 59.608
  },
  "oklch": {
    "l": 0.6895,
    "c": 0.11945,
    "h": 242.9
  },
  "luminance": 0.33271
}

Semantic roles & 50–950 ramp

primary
#51A3DF
secondary
#E1C2AA
accent
#863CEC
background
#F9FBFE
surface
#F2F6FD
border
#CCD0D5
text
#0E1216
muted
#7E8184

Preview Lab

Preview with #51A3DF

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

Preview Lab → · Contrast checker → · Palette generator →

#51A3DF Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva