#1F1D91#1F1D91

#1F1D91 is a dark, vivid blue. Relative luminance 0.032; OKLCH L 33.6% C 0.180 H 271.8°. Best body text is #FFFFFF at 12.78:1 contrast (WCAG AA passes).

Color values

HEX	#1F1D91
RGB	rgb(31, 29, 145)
HSL	hsl(241, 67%, 34%)
HSV	hsv(241, 80%, 57%)
CMYK	cmyk(78.6%, 80%, 0%, 43.1%)
CIE-LAB	lab(20.88, 41.37, -62.19)
CIE-LCH	lch(20.88, 74.69, 303.63°)
OKLab	oklab(33.58% 0.0058 -0.18)
OKLCH	oklch(33.58% 0.18 271.8)
XYZ	xyz(6.1136, 3.2137, 27.0807)
Luminance	0.0321 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F1D91 #8F911D

analogous

#1D5591 #1F1D91 #591D91

triadic

#1F1D91 #911F1D #1D911F

tetradic

#1F1D91 #911D55 #8F911D #1D9159

square

#1F1D91 #911D55 #8F911D #1D9159

split-complementary

#1F1D91 #91591D #55911D

monochromatic

#09092B #14135E #1F1D91 #2A27C4 #4F4DDB

Accessibility & contrast

On white

12.78

#1F1D91 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.64

#1F1D91 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F1D91

12.78:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F1D91	#FFFFFF	#000000	##FFFFFF
##1F1D91	1.00	12.78	1.64	12.78
#FFFFFF	12.78	1.00	21.00	1.00
#000000	1.64	21.00	1.00	21.00
##FFFFFF	12.78	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003894

Deuteranopia (green-blind)

#002C8F

Tritanopia (blue-blind)

#004157

Achromatopsia (no color)

#323232

Design tokens & code

CSS

--color: #1f1d91;
/* rgb */ color: rgb(31, 29, 145);
/* oklch */ color: oklch(33.6% 0.180 271.8);

Tailwind

colors: {
  custom: {
    50: '#705cb3',
    500: '#1f1d91',
    950: '#000000',
  },
}

SCSS

$custom: #1f1d91;
$custom-light: #705cb3;
$custom-dark: #000000;

JSON

{
  "hex": "#1f1d91",
  "rgb": {
    "r": 31,
    "g": 29,
    "b": 145
  },
  "hsl": {
    "h": 241.034,
    "s": 66.667,
    "l": 34.118
  },
  "oklch": {
    "l": 0.33582,
    "c": 0.1801,
    "h": 271.8
  },
  "luminance": 0.03214
}

Semantic roles & 50–950 ramp

primary

#1F1D91

secondary

#BCBE4C

accent

#EA3EE7

background

#F7F5FB

surface

#EDE9F6

border

#C8C5D0

text

#090411

muted

#7B7980

Preview Lab

Preview with #1F1D91

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

Preview Lab → · Contrast checker → · Palette generator →