#3873D0#3873D0

#3873D0 is a mid, vivid blue. Relative luminance 0.177; OKLCH L 56.5% C 0.156 H 259.2°. Best body text is #FFFFFF at 4.63:1 contrast (WCAG AA passes).

Color values

HEX#3873D0
RGBrgb(56, 115, 208)
HSLhsl(217, 62%, 52%)
HSVhsv(217, 73%, 82%)
CMYKcmyk(73.1%, 44.7%, 0%, 18.4%)
CIE-LABlab(49.07, 12.59, -53.63)
CIE-LCHlch(49.07, 55.09, 283.21°)
OKLaboklab(56.48% -0.0292 -0.1536)
OKLCHoklch(56.48% 0.156 259.2)
XYZxyz(19.1427, 17.6542, 62.0610)
Luminance0.1766 (WCAG relative)
Temperaturecool
Familyblue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#3873D0 #D09538
analogous
#38BFD0 #3873D0 #4938D0
triadic
#3873D0 #D03873 #73D038
tetradic
#3873D0 #D038BF #D09538 #38D049
square
#3873D0 #D038BF #D09538 #38D049
split-complementary
#3873D0 #D04938 #BFD038
monochromatic
#1B3D73 #2757A4 #3873D0 #6A96DC #9BB9E7

Accessibility & contrast

On white

4.63
#3873D0 on #FFFFFF
AA ✓AA large ✓AAA ✗

On black

4.53
#3873D0 on #000000
AA ✓AA large ✓AAA ✗

Best text color

#FFFFFF on #3873D0
4.63:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##3873D0#FFFFFF#000000##FFFFFF
##3873D01.004.634.534.63
#FFFFFF4.631.0021.001.00
#0000004.5321.001.0021.00
##FFFFFF4.631.0021.001.00

Color blindness preview

Protanopia (red-blind)
#447CD4
Deuteranopia (green-blind)
#256ECE
Tritanopia (blue-blind)
#008997
Achromatopsia (no color)
#757575

Design tokens & code

CSS
--color: #3873d0;
/* rgb */ color: rgb(56, 115, 208);
/* oklch */ color: oklch(56.5% 0.156 259.2);
Tailwind
colors: {
  custom: {
    50: '#829adf',
    500: '#3873d0',
    950: '#000000',
  },
}
SCSS
$custom: #3873d0;
$custom-light: #829adf;
$custom-dark: #000000;
JSON
{
  "hex": "#3873d0",
  "rgb": {
    "r": 56,
    "g": 115,
    "b": 208
  },
  "hsl": {
    "h": 216.711,
    "s": 61.789,
    "l": 51.765
  },
  "oklch": {
    "l": 0.56483,
    "c": 0.15636,
    "h": 259.2
  },
  "luminance": 0.17656
}

Semantic roles & 50–950 ramp

primary
#3873D0
secondary
#D3B991
accent
#A643E5
background
#F8F9FD
surface
#F0F2FB
border
#CBCCD4
text
#0C0E15
muted
#7D7E83

Preview Lab

Preview with #3873D0

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

Preview Lab → · Contrast checker → · Palette generator →

#3873D0 Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva