#1F3669#1F3669

#1F3669 is a dark, moderate blue. Relative luminance 0.040; OKLCH L 34.4% C 0.094 H 263.9°. Best body text is #FFFFFF at 11.73:1 contrast (WCAG AA passes).

Color values

HEX#1F3669
RGBrgb(31, 54, 105)
HSLhsl(221, 54%, 27%)
HSVhsv(221, 70%, 41%)
CMYKcmyk(70.5%, 48.6%, 0%, 58.8%)
CIE-LABlab(23.50, 9.71, -32.57)
CIE-LCHlch(23.50, 33.99, 286.60°)
OKLaboklab(34.38% -0.01 -0.0932)
OKLCHoklch(34.38% 0.094 263.9)
XYZxyz(4.4331, 3.9491, 13.8905)
Luminance0.0395 (WCAG relative)
Temperaturecool
Familyblue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#1F3669 #69521F
analogous
#1F5B69 #1F3669 #2D1F69
triadic
#1F3669 #691F36 #36691F
tetradic
#1F3669 #691F5B #69521F #1F692D
square
#1F3669 #691F5B #69521F #1F692D
split-complementary
#1F3669 #692D1F #5B691F
monochromatic
#070C18 #111E3A #1F3669 #2D4E98 #3D67C6

Accessibility & contrast

On white

11.73
#1F3669 on #FFFFFF
AA ✓AA large ✓AAA ✓

On black

1.79
#1F3669 on #000000
AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F3669
11.73:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##1F3669#FFFFFF#000000##FFFFFF
##1F36691.0011.731.7911.73
#FFFFFF11.731.0021.001.00
#0000001.7921.001.0021.00
##FFFFFF11.731.0021.001.00

Color blindness preview

Protanopia (red-blind)
#1D3C6B
Deuteranopia (green-blind)
#0E3568
Tritanopia (blue-blind)
#00424A
Achromatopsia (no color)
#383838

Design tokens & code

CSS
--color: #1f3669;
/* rgb */ color: rgb(31, 54, 105);
/* oklch */ color: oklch(34.4% 0.094 263.9);
Tailwind
colors: {
  custom: {
    50: '#646c94',
    500: '#1f3669',
    950: '#000000',
  },
}
SCSS
$custom: #1f3669;
$custom-light: #646c94;
$custom-dark: #000000;
JSON
{
  "hex": "#1f3669",
  "rgb": {
    "r": 31,
    "g": 54,
    "b": 105
  },
  "hsl": {
    "h": 221.351,
    "s": 54.412,
    "l": 26.667
  },
  "oklch": {
    "l": 0.34384,
    "c": 0.09371,
    "h": 263.9
  },
  "luminance": 0.0395
}

Semantic roles & 50–950 ramp

primary
#1F3669
secondary
#9D8247
accent
#B04ADE
background
#F6F6F9
surface
#EBEBF1
border
#C6C6CB
text
#06060D
muted
#7A7A7E

Preview Lab

Preview with #1F3669

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

Preview Lab → · Contrast checker → · Palette generator →

#1F3669 Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva