#1F1799#1F1799

#1F1799 is a dark, vivid blue. Relative luminance 0.032; OKLCH L 33.8% C 0.195 H 271.6°. Best body text is #FFFFFF at 12.80:1 contrast (WCAG AA passes).

Color values

HEX	#1F1799
RGB	rgb(31, 23, 153)
HSL	hsl(244, 74%, 35%)
HSV	hsv(244, 85%, 60%)
CMYK	cmyk(79.7%, 85%, 0%, 40%)
CIE-LAB	lab(20.84, 46.92, -67.20)
CIE-LCH	lch(20.84, 81.96, 304.92°)
OKLab	oklab(33.84% 0.0056 -0.1944)
OKLCH	oklch(33.84% 0.195 271.6)
XYZ	xyz(6.6193, 3.2033, 30.4002)
Luminance	0.0320 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F1799 #919917

analogous

#175099 #1F1799 #601799

triadic

#1F1799 #991F17 #17991F

tetradic

#1F1799 #991750 #919917 #179960

square

#1F1799 #991750 #919917 #179960

split-complementary

#1F1799 #996017 #509917

monochromatic

#09072F #140F64 #1F1799 #2A1FCE #5147E3

Accessibility & contrast

On white

12.80

#1F1799 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.64

#1F1799 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F1799

12.80:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F1799	#FFFFFF	#000000	##FFFFFF
##1F1799	1.00	12.80	1.64	12.80
#FFFFFF	12.80	1.00	21.00	1.00
#000000	1.64	21.00	1.00	21.00
##FFFFFF	12.80	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00389C

Deuteranopia (green-blind)

#002C97

Tritanopia (blue-blind)

#00425A

Achromatopsia (no color)

#323232

Design tokens & code

CSS

--color: #1f1799;
/* rgb */ color: rgb(31, 23, 153);
/* oklch */ color: oklch(33.8% 0.195 271.6);

Tailwind

colors: {
  custom: {
    50: '#7359b8',
    500: '#1f1799',
    950: '#000000',
  },
}

SCSS

$custom: #1f1799;
$custom-light: #7359b8;
$custom-dark: #000000;

JSON

{
  "hex": "#1f1799",
  "rgb": {
    "r": 31,
    "g": 23,
    "b": 153
  },
  "hsl": {
    "h": 243.692,
    "s": 73.864,
    "l": 34.51
  },
  "oklch": {
    "l": 0.33837,
    "c": 0.1945,
    "h": 271.6
  },
  "luminance": 0.03204
}

Semantic roles & 50–950 ramp

primary

#1F1799

secondary

#BDC547

accent

#F137E5

background

#F7F5FB

surface

#EEE9F6

border

#C9C5D0

text

#0A0412

muted

#7C7981

Preview Lab

Preview with #1F1799

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

Preview Lab → · Contrast checker → · Palette generator →