#1F1381#1F1381

#1F1381 is a dark, vivid blue. Relative luminance 0.023; OKLCH L 30.4% C 0.169 H 274.5°. Best body text is #FFFFFF at 14.30:1 contrast (WCAG AA passes).

Color values

HEX	#1F1381
RGB	rgb(31, 19, 129)
HSL	hsl(247, 74%, 29%)
HSV	hsv(247, 85%, 51%)
CMYK	cmyk(76%, 85.3%, 0%, 49.4%)
CIE-LAB	lab(17.19, 41.24, -58.27)
CIE-LCH	lch(17.19, 71.39, 305.29°)
OKLab	oklab(30.45% 0.0133 -0.1685)
OKLCH	oklch(30.45% 0.169 274.5)
XYZ	xyz(4.7591, 2.3416, 20.9658)
Luminance	0.0234 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F1381 #758113

analogous

#133E81 #1F1381 #561381

triadic

#1F1381 #811F13 #13811F

tetradic

#1F1381 #81133E #758113 #138156

square

#1F1381 #81133E #758113 #138156

split-complementary

#1F1381 #815613 #3E8113

monochromatic

#06041B #120B4C #1F1381 #2C1BB6 #422EE0

Accessibility & contrast

On white

14.30

#1F1381 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.47

#1F1381 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F1381

14.30:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F1381	#FFFFFF	#000000	##FFFFFF
##1F1381	1.00	14.30	1.47	14.30
#FFFFFF	14.30	1.00	21.00	1.00
#000000	1.47	21.00	1.00	21.00
##FFFFFF	14.30	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002F84

Deuteranopia (green-blind)

#00257F

Tritanopia (blue-blind)

#00364B

Achromatopsia (no color)

#2A2A2A

Design tokens & code

CSS

--color: #1f1381;
/* rgb */ color: rgb(31, 19, 129);
/* oklch */ color: oklch(30.4% 0.169 274.5);

Tailwind

colors: {
  custom: {
    50: '#6d55a7',
    500: '#1f1381',
    950: '#000000',
  },
}

SCSS

$custom: #1f1381;
$custom-light: #6d55a7;
$custom-dark: #000000;

JSON

{
  "hex": "#1f1381",
  "rgb": {
    "r": 31,
    "g": 19,
    "b": 129
  },
  "hsl": {
    "h": 246.545,
    "s": 74.324,
    "l": 29.02
  },
  "oklch": {
    "l": 0.30449,
    "c": 0.16901,
    "h": 274.5
  },
  "luminance": 0.02342
}

Semantic roles & 50–950 ramp

primary

#1F1381

secondary

#A9B63A

accent

#F137DD

background

#F7F5FA

surface

#EDE9F4

border

#C8C5CE

text

#080310

muted

#7B787F

Preview Lab

Preview with #1F1381

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

Preview Lab → · Contrast checker → · Palette generator →