#1F1DAA#1F1DAA

#1F1DAA is a dark, highly saturated blue. Relative luminance 0.041; OKLCH L 36.6% C 0.210 H 270.1°. Best body text is #FFFFFF at 11.57:1 contrast (WCAG AA passes).

Color values

HEX#1F1DAA
RGBrgb(31, 29, 170)
HSLhsl(241, 71%, 39%)
HSVhsv(241, 83%, 67%)
CMYKcmyk(81.8%, 82.9%, 0%, 33.3%)
CIE-LABlab(23.91, 49.44, -72.47)
CIE-LCHlch(23.91, 87.73, 304.30°)
OKLaboklab(36.56% 0.0003 -0.2098)
OKLCHoklch(36.56% 0.21 270.1)
XYZxyz(8.2577, 4.0714, 38.3730)
Luminance0.0407 (WCAG relative)
Temperaturecool
Familyblue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#1F1DAA #A8AA1D
analogous
#1D62AA #1F1DAA #661DAA
triadic
#1F1DAA #AA1F1D #1DAA1F
tetradic
#1F1DAA #AA1D62 #A8AA1D #1DAA66
square
#1F1DAA #AA1D62 #A8AA1D #1DAA66
split-complementary
#1F1DAA #AA661D #62AA1D
monochromatic
#0C0B41 #151476 #1F1DAA #2C2ADB #605EE4

Accessibility & contrast

On white

11.57
#1F1DAA on #FFFFFF
AA ✓AA large ✓AAA ✓

On black

1.81
#1F1DAA on #000000
AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F1DAA
11.57:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##1F1DAA#FFFFFF#000000##FFFFFF
##1F1DAA1.0011.571.8111.57
#FFFFFF11.571.0021.001.00
#0000001.8121.001.0021.00
##FFFFFF11.571.0021.001.00

Color blindness preview

Protanopia (red-blind)
#0040AE
Deuteranopia (green-blind)
#0031A8
Tritanopia (blue-blind)
#004B65
Achromatopsia (no color)
#393939

Design tokens & code

CSS
--color: #1f1daa;
/* rgb */ color: rgb(31, 29, 170);
/* oklch */ color: oklch(36.6% 0.210 270.1);
Tailwind
colors: {
  custom: {
    50: '#775dc5',
    500: '#1f1daa',
    950: '#000000',
  },
}
SCSS
$custom: #1f1daa;
$custom-light: #775dc5;
$custom-dark: #000000;
JSON
{
  "hex": "#1f1daa",
  "rgb": {
    "r": 31,
    "g": 29,
    "b": 170
  },
  "hsl": {
    "h": 240.851,
    "s": 70.854,
    "l": 39.02
  },
  "oklch": {
    "l": 0.36563,
    "c": 0.20978,
    "h": 270.1
  },
  "luminance": 0.04072
}

Semantic roles & 50–950 ramp

primary
#1F1DAA
secondary
#C6C85B
accent
#EE3AEB
background
#F8F5FC
surface
#EFE9F8
border
#CAC5D1
text
#0B0413
muted
#7C7982

Preview Lab

Preview with #1F1DAA

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

Preview Lab → · Contrast checker → · Palette generator →

#1F1DAA Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva