#51A4E5#51A4E5

#51A4E5 is a light, vivid cyan. Relative luminance 0.340; OKLCH L 69.5% C 0.125 H 244.7°. Best body text is #000000 at 7.79:1 contrast (WCAG AA passes).

Color values

HEX#51A4E5
RGBrgb(81, 164, 229)
HSLhsl(206, 74%, 61%)
HSVhsv(206, 65%, 90%)
CMYKcmyk(64.6%, 28.4%, 0%, 10.2%)
CIE-LABlab(64.93, -5.36, -40.22)
CIE-LCHlch(64.93, 40.58, 262.40°)
OKLaboklab(69.47% -0.0536 -0.1134)
OKLCHoklch(69.47% 0.125 244.7)
XYZxyz(30.8063, 33.9543, 79.0439)
Luminance0.3396 (WCAG relative)
Temperaturecool
Familycyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#51A4E5 #E59251
analogous
#51E5DC #51A4E5 #515AE5
triadic
#51A4E5 #E551A4 #A4E551
tetradic
#51A4E5 #DC51E5 #E59251 #5AE551
square
#51A4E5 #DC51E5 #E59251 #5AE551
split-complementary
#51A4E5 #E5515A #E5DC51
monochromatic
#1866A3 #2088D8 #51A4E5 #86C0ED #BBDCF5

Accessibility & contrast

On white

2.70
#51A4E5 on #FFFFFF
AA ✗AA large ✗AAA ✗

On black

7.79
#51A4E5 on #000000
AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51A4E5
7.79:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##51A4E5#FFFFFF#000000##000000
##51A4E51.002.707.797.79
#FFFFFF2.701.0021.0021.00
#0000007.7921.001.001.00
##0000007.7921.001.001.00

Color blindness preview

Protanopia (red-blind)
#87A6E8
Deuteranopia (green-blind)
#7397E4
Tritanopia (blue-blind)
#00B4BB
Achromatopsia (no color)
#9E9E9E

Design tokens & code

CSS
--color: #51a4e5;
/* rgb */ color: rgb(81, 164, 229);
/* oklch */ color: oklch(69.5% 0.125 244.7);
Tailwind
colors: {
  custom: {
    50: '#90beed',
    500: '#51a4e5',
    950: '#000000',
  },
}
SCSS
$custom: #51a4e5;
$custom-light: #90beed;
$custom-dark: #000000;
JSON
{
  "hex": "#51a4e5",
  "rgb": {
    "r": 81,
    "g": 164,
    "b": 229
  },
  "hsl": {
    "h": 206.351,
    "s": 74,
    "l": 60.784
  },
  "oklch": {
    "l": 0.6947,
    "c": 0.12545,
    "h": 244.7
  },
  "luminance": 0.33957
}

Semantic roles & 50–950 ramp

primary
#51A4E5
secondary
#E5C5AD
accent
#670FD6
background
#F9FBFE
surface
#F2F6FD
border
#CCD0D5
text
#0E1216
muted
#7E8184

Preview Lab

Preview with #51A4E5

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

Preview Lab → · Contrast checker → · Palette generator →

#51A4E5 Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva