#51A3D9#51A3D9

#51A3D9 is a light, moderate cyan. Relative luminance 0.330; OKLCH L 68.7% C 0.113 H 240.1°. Best body text is #000000 at 7.59:1 contrast (WCAG AA passes).

Color values

HEX#51A3D9
RGBrgb(81, 163, 217)
HSLhsl(204, 64%, 58%)
HSVhsv(204, 63%, 85%)
CMYKcmyk(62.7%, 24.9%, 0%, 14.9%)
CIE-LABlab(64.12, -8.70, -34.85)
CIE-LCHlch(64.12, 35.92, 255.98°)
OKLaboklab(68.66% -0.0563 -0.0979)
OKLCHoklch(68.66% 0.113 240.1)
XYZxyz(29.0102, 32.9506, 70.4634)
Luminance0.3295 (WCAG relative)
Temperaturecool
Familycyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#51A3D9 #D98751
analogous
#51D9CB #51A3D9 #515FD9
triadic
#51A3D9 #D951A3 #A3D951
tetradic
#51A3D9 #CB51D9 #D98751 #5FD951
square
#51A3D9 #CB51D9 #D98751 #5FD951
split-complementary
#51A3D9 #D9515F #D9CB51
monochromatic
#1F6390 #2A86C2 #51A3D9 #83BEE4 #B5D8EF

Accessibility & contrast

On white

2.77
#51A3D9 on #FFFFFF
AA ✗AA large ✗AAA ✗

On black

7.59
#51A3D9 on #000000
AA ✓AA large ✓AAA ✓

Best text color

#000000 on #51A3D9
7.59:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##51A3D9#FFFFFF#000000##000000
##51A3D91.002.777.597.59
#FFFFFF2.771.0021.0021.00
#0000007.5921.001.001.00
##0000007.5921.001.001.00

Color blindness preview

Protanopia (red-blind)
#8AA3DB
Deuteranopia (green-blind)
#7895D8
Tritanopia (blue-blind)
#00B0B5
Achromatopsia (no color)
#9B9B9B

Design tokens & code

CSS
--color: #51a3d9;
/* rgb */ color: rgb(81, 163, 217);
/* oklch */ color: oklch(68.7% 0.113 240.1);
Tailwind
colors: {
  custom: {
    50: '#8ebee5',
    500: '#51a3d9',
    950: '#000000',
  },
}
SCSS
$custom: #51a3d9;
$custom-light: #8ebee5;
$custom-dark: #000000;
JSON
{
  "hex": "#51a3d9",
  "rgb": {
    "r": 81,
    "g": 163,
    "b": 217
  },
  "hsl": {
    "h": 203.824,
    "s": 64.151,
    "l": 58.431
  },
  "oklch": {
    "l": 0.68662,
    "c": 0.11296,
    "h": 240.1
  },
  "luminance": 0.32953
}

Semantic roles & 50–950 ramp

primary
#51A3D9
secondary
#DEBDA8
accent
#8341E7
background
#F9FBFE
surface
#F2F6FC
border
#CCD0D5
text
#0D1215
muted
#7E8184

Preview Lab

Preview with #51A3D9

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

Preview Lab → · Contrast checker → · Palette generator →

#51A3D9 Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva