#1F1C99#1F1C99

#1F1C99 is a dark, vivid blue. Relative luminance 0.034; OKLCH L 34.4% C 0.191 H 271.3°. Best body text is #FFFFFF at 12.47:1 contrast (WCAG AA passes).

Color values

HEX	#1F1C99
RGB	rgb(31, 28, 153)
HSL	hsl(241, 69%, 35%)
HSV	hsv(241, 82%, 60%)
CMYK	cmyk(79.7%, 81.7%, 0%, 40%)
CIE-LAB	lab(21.66, 44.52, -65.84)
CIE-LCH	lch(21.66, 79.48, 304.06°)
OKLab	oklab(34.4% 0.0043 -0.1906)
OKLCH	oklch(34.4% 0.191 271.3)
XYZ	xyz(6.7282, 3.4210, 30.4365)
Luminance	0.0342 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F1C99 #96991C

analogous

#1C5799 #1F1C99 #5D1C99

triadic

#1F1C99 #991F1C #1C991F

tetradic

#1F1C99 #991C57 #96991C #1C995D

square

#1F1C99 #991C57 #96991C #1C995D

split-complementary

#1F1C99 #995D1C #57991C

monochromatic

#0A0932 #151365 #1F1C99 #2925CD #5450DF

Accessibility & contrast

On white

12.47

#1F1C99 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.68

#1F1C99 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F1C99

12.47:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F1C99	#FFFFFF	#000000	##FFFFFF
##1F1C99	1.00	12.47	1.68	12.47
#FFFFFF	12.47	1.00	21.00	1.00
#000000	1.68	21.00	1.00	21.00
##FFFFFF	12.47	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003A9C

Deuteranopia (green-blind)

#002D97

Tritanopia (blue-blind)

#00435B

Achromatopsia (no color)

#343434

Design tokens & code

CSS

--color: #1f1c99;
/* rgb */ color: rgb(31, 28, 153);
/* oklch */ color: oklch(34.4% 0.191 271.3);

Tailwind

colors: {
  custom: {
    50: '#725cb8',
    500: '#1f1c99',
    950: '#000000',
  },
}

SCSS

$custom: #1f1c99;
$custom-light: #725cb8;
$custom-dark: #000000;

JSON

{
  "hex": "#1f1c99",
  "rgb": {
    "r": 31,
    "g": 28,
    "b": 153
  },
  "hsl": {
    "h": 241.44,
    "s": 69.061,
    "l": 35.49
  },
  "oklch": {
    "l": 0.34403,
    "c": 0.19065,
    "h": 271.3
  },
  "luminance": 0.03422
}

Semantic roles & 50–950 ramp

primary

#1F1C99

secondary

#BFC24F

accent

#EC3CE8

background

#F7F5FB

surface

#EEE9F6

border

#C9C5D0

text

#0A0412

muted

#7C7981

Preview Lab

Preview with #1F1C99

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

Preview Lab → · Contrast checker → · Palette generator →