#3781CA#3781CA

#3781CA is a mid, vivid cyan. Relative luminance 0.208; OKLCH L 59.2% C 0.134 H 250.9°. Best body text is #000000 at 5.16:1 contrast (WCAG AA passes).

Color values

HEX#3781CA
RGBrgb(55, 129, 202)
HSLhsl(210, 58%, 50%)
HSVhsv(210, 73%, 79%)
CMYKcmyk(72.8%, 36.1%, 0%, 20.8%)
CIE-LABlab(52.70, 1.67, -44.43)
CIE-LCHlch(52.70, 44.46, 272.16°)
OKLaboklab(59.19% -0.0438 -0.1264)
OKLCHoklch(59.19% 0.134 250.9)
XYZxyz(20.0825, 20.7748, 58.8172)
Luminance0.2078 (WCAG relative)
Temperaturecool
Familycyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#3781CA #CA8037
analogous
#37CACA #3781CA #3737CA
triadic
#3781CA #CA3781 #81CA37
tetradic
#3781CA #CA37CA #CA8037 #37CA37
square
#3781CA #CA37CA #CA8037 #37CA37
split-complementary
#3781CA #CA3737 #CACA37
monochromatic
#1C446A #29629B #3781CA #679FD7 #98BEE4

Accessibility & contrast

On white

4.07
#3781CA on #FFFFFF
AA ✗AA large ✓AAA ✗

On black

5.16
#3781CA on #000000
AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3781CA
5.16:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##3781CA#FFFFFF#000000##000000
##3781CA1.004.075.165.16
#FFFFFF4.071.0021.0021.00
#0000005.1621.001.001.00
##0000005.1621.001.001.00

Color blindness preview

Protanopia (red-blind)
#6085CD
Deuteranopia (green-blind)
#4A78C9
Tritanopia (blue-blind)
#00929C
Achromatopsia (no color)
#7E7E7E

Design tokens & code

CSS
--color: #3781ca;
/* rgb */ color: rgb(55, 129, 202);
/* oklch */ color: oklch(59.2% 0.134 250.9);
Tailwind
colors: {
  custom: {
    50: '#80a5da',
    500: '#3781ca',
    950: '#000000',
  },
}
SCSS
$custom: #3781ca;
$custom-light: #80a5da;
$custom-dark: #000000;
JSON
{
  "hex": "#3781ca",
  "rgb": {
    "r": 55,
    "g": 129,
    "b": 202
  },
  "hsl": {
    "h": 209.796,
    "s": 58.103,
    "l": 50.392
  },
  "oklch": {
    "l": 0.59186,
    "c": 0.13377,
    "h": 250.9
  },
  "luminance": 0.20777
}

Semantic roles & 50–950 ramp

primary
#3781CA
secondary
#CFAE8E
accent
#9346E1
background
#F8FAFD
surface
#F0F4FB
border
#CBCED4
text
#0C0F15
muted
#7D7F83

Preview Lab

Preview with #3781CA

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

Preview Lab → · Contrast checker → · Palette generator →

#3781CA Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva