#1C3688#1C3688

#1C3688 is a dark, vivid blue. Relative luminance 0.047; OKLCH L 36.8% C 0.141 H 266.1°. Best body text is #FFFFFF at 10.87:1 contrast (WCAG AA passes).

Color values

HEX#1C3688
RGBrgb(28, 54, 136)
HSLhsl(226, 66%, 32%)
HSVhsv(226, 79%, 53%)
CMYKcmyk(79.4%, 60.3%, 0%, 46.7%)
CIE-LABlab(25.75, 21.76, -48.59)
CIE-LCHlch(25.75, 53.24, 294.12°)
OKLaboklab(36.8% -0.0096 -0.1404)
OKLCHoklch(36.8% 0.141 266.1)
XYZxyz(6.2404, 4.6621, 23.8588)
Luminance0.0466 (WCAG relative)
Temperaturecool
Familyblue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#1C3688 #886E1C
analogous
#1C6C88 #1C3688 #381C88
triadic
#1C3688 #881C36 #36881C
tetradic
#1C3688 #881C6C #886E1C #1C8838
square
#1C3688 #881C6C #886E1C #1C8838
split-complementary
#1C3688 #88381C #6C881C
monochromatic
#070E22 #122255 #1C3688 #264ABB #4669D9

Accessibility & contrast

On white

10.87
#1C3688 on #FFFFFF
AA ✓AA large ✓AAA ✓

On black

1.93
#1C3688 on #000000
AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1C3688
10.87:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##1C3688#FFFFFF#000000##FFFFFF
##1C36881.0010.871.9310.87
#FFFFFF10.871.0021.001.00
#0000001.9321.001.0021.00
##FFFFFF10.871.0021.001.00

Color blindness preview

Protanopia (red-blind)
#00428B
Deuteranopia (green-blind)
#003886
Tritanopia (blue-blind)
#004B59
Achromatopsia (no color)
#3D3D3D

Design tokens & code

CSS
--color: #1c3688;
/* rgb */ color: rgb(28, 54, 136);
/* oklch */ color: oklch(36.8% 0.141 266.1);
Tailwind
colors: {
  custom: {
    50: '#6b6cab',
    500: '#1c3688',
    950: '#000000',
  },
}
SCSS
$custom: #1c3688;
$custom-light: #6b6cab;
$custom-dark: #000000;
JSON
{
  "hex": "#1c3688",
  "rgb": {
    "r": 28,
    "g": 54,
    "b": 136
  },
  "hsl": {
    "h": 225.556,
    "s": 65.854,
    "l": 32.157
  },
  "oklch": {
    "l": 0.36803,
    "c": 0.14069,
    "h": 266.1
  },
  "luminance": 0.04663
}

Semantic roles & 50–950 ramp

primary
#1C3688
secondary
#BA9E45
accent
#C03FE9
background
#F6F6FA
surface
#ECEBF4
border
#C7C6CE
text
#080710
muted
#7A7A7F

Preview Lab

Preview with #1C3688

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

Preview Lab → · Contrast checker → · Palette generator →

#1C3688 Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva