#51A9EA#51A9EA

#51A9EA is a light, vivid cyan. Relative luminance 0.361; OKLCH L 70.8% C 0.127 H 243.4°. Best body text is #000000 at 8.21:1 contrast (WCAG AA passes).

Color values

HEX#51A9EA
RGBrgb(81, 169, 234)
HSLhsl(205, 78%, 62%)
HSVhsv(205, 65%, 92%)
CMYKcmyk(65.4%, 27.8%, 0%, 8.2%)
CIE-LABlab(66.57, -6.52, -40.40)
CIE-LCHlch(66.57, 40.92, 260.83°)
OKLaboklab(70.84% -0.0571 -0.1139)
OKLCHoklch(70.84% 0.127 243.4)
XYZxyz(32.4270, 36.0624, 83.0778)
Luminance0.3607 (WCAG relative)
Temperaturecool
Familycyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#51A9EA #EA9251
analogous
#51EADF #51A9EA #515DEA
triadic
#51A9EA #EA51A9 #A9EA51
tetradic
#51A9EA #DF51EA #EA9251 #5DEA51
square
#51A9EA #DF51EA #EA9251 #5DEA51
split-complementary
#51A9EA #EA515D #EADF51
monochromatic
#156CAC #1B8EE2 #51A9EA #88C4F1 #BEDFF7

Accessibility & contrast

On white

2.56
#51A9EA on #FFFFFF
AA ✗AA large ✗AAA ✗

On black

8.21
#51A9EA on #000000
AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51A9EA
8.21:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##51A9EA#FFFFFF#000000##000000
##51A9EA1.002.568.218.21
#FFFFFF2.561.0021.0021.00
#0000008.2121.001.001.00
##0000008.2121.001.001.00

Color blindness preview

Protanopia (red-blind)
#8CAAED
Deuteranopia (green-blind)
#779BE9
Tritanopia (blue-blind)
#00B9C0
Achromatopsia (no color)
#A2A2A2

Design tokens & code

CSS
--color: #51a9ea;
/* rgb */ color: rgb(81, 169, 234);
/* oklch */ color: oklch(70.8% 0.127 243.4);
Tailwind
colors: {
  custom: {
    50: '#91c2f1',
    500: '#51a9ea',
    950: '#000000',
  },
}
SCSS
$custom: #51a9ea;
$custom-light: #91c2f1;
$custom-dark: #000000;
JSON
{
  "hex": "#51a9ea",
  "rgb": {
    "r": 81,
    "g": 169,
    "b": 234
  },
  "hsl": {
    "h": 205.49,
    "s": 78.462,
    "l": 61.765
  },
  "oklch": {
    "l": 0.70838,
    "c": 0.1274,
    "h": 243.4
  },
  "luminance": 0.36066
}

Semantic roles & 50–950 ramp

primary
#51A9EA
secondary
#E8C7AF
accent
#630BDB
background
#F9FBFE
surface
#F2F7FD
border
#CCD0D5
text
#0E1216
muted
#7E8184

Preview Lab

Preview with #51A9EA

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

Preview Lab → · Contrast checker → · Palette generator →

#51A9EA Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva