#1F1B9E#1F1B9E

#1F1B9E is a dark, vivid blue. Relative luminance 0.035; OKLCH L 34.9% C 0.197 H 271.0°. Best body text is #FFFFFF at 12.29:1 contrast (WCAG AA passes).

Color values

HEX	#1F1B9E
RGB	rgb(31, 27, 158)
HSL	hsl(242, 71%, 36%)
HSV	hsv(242, 83%, 62%)
CMYK	cmyk(80.4%, 82.9%, 0%, 38%)
CIE-LAB	lab(22.10, 46.62, -68.18)
CIE-LCH	lch(22.10, 82.59, 304.36°)
OKLab	oklab(34.89% 0.0035 -0.1973)
OKLCH	oklch(34.89% 0.197 271)
XYZ	xyz(7.1265, 3.5430, 32.6494)
Luminance	0.0354 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F1B9E #9A9E1B

analogous

#1B599E #1F1B9E #611B9E

triadic

#1F1B9E #9E1F1B #1B9E1F

tetradic

#1F1B9E #9E1B59 #9A9E1B #1B9E61

square

#1F1B9E #9E1B59 #9A9E1B #1B9E61

split-complementary

#1F1B9E #9E611B #599E1B

monochromatic

#0A0935 #15126A #1F1B9E #2924D2 #5652E1

Accessibility & contrast

On white

12.29

#1F1B9E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.71

#1F1B9E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F1B9E

12.29:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F1B9E	#FFFFFF	#000000	##FFFFFF
##1F1B9E	1.00	12.29	1.71	12.29
#FFFFFF	12.29	1.00	21.00	1.00
#000000	1.71	21.00	1.00	21.00
##FFFFFF	12.29	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003BA2

Deuteranopia (green-blind)

#002E9C

Tritanopia (blue-blind)

#00455E

Achromatopsia (no color)

#353535

Design tokens & code

CSS

--color: #1f1b9e;
/* rgb */ color: rgb(31, 27, 158);
/* oklch */ color: oklch(34.9% 0.197 271.0);

Tailwind

colors: {
  custom: {
    50: '#745bbc',
    500: '#1f1b9e',
    950: '#000000',
  },
}

SCSS

$custom: #1f1b9e;
$custom-light: #745bbc;
$custom-dark: #000000;

JSON

{
  "hex": "#1f1b9e",
  "rgb": {
    "r": 31,
    "g": 27,
    "b": 158
  },
  "hsl": {
    "h": 241.832,
    "s": 70.811,
    "l": 36.275
  },
  "oklch": {
    "l": 0.34886,
    "c": 0.19736,
    "h": 271
  },
  "luminance": 0.03544
}

Semantic roles & 50–950 ramp

primary

#1F1B9E

secondary

#C1C451

accent

#EE3AE8

background

#F7F5FB

surface

#EEE9F7

border

#C9C5D0

text

#0A0412

muted

#7C7981

Preview Lab

Preview with #1F1B9E

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

Preview Lab → · Contrast checker → · Palette generator →