#1F1F8A#1F1F8A

#1F1F8A is a dark, vivid blue. Relative luminance 0.031; OKLCH L 33.1% C 0.170 H 272.2°. Best body text is #FFFFFF at 12.95:1 contrast (WCAG AA passes).

Color values

HEX	#1F1F8A
RGB	rgb(31, 31, 138)
HSL	hsl(240, 63%, 33%)
HSV	hsv(240, 78%, 54%)
CMYK	cmyk(77.5%, 77.5%, 0%, 45.9%)
CIE-LAB	lab(20.46, 37.87, -58.52)
CIE-LCH	lch(20.46, 69.70, 302.91°)
OKLab	oklab(33.05% 0.0065 -0.1694)
OKLCH	oklch(33.05% 0.17 272.2)
XYZ	xyz(5.6410, 3.1057, 24.3420)
Luminance	0.0311 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F1F8A #8A8A1F

analogous

#1F548A #1F1F8A #541F8A

triadic

#1F1F8A #8A1F1F #1F8A1F

tetradic

#1F1F8A #8A1F54 #8A8A1F #1F8A54

square

#1F1F8A #8A1F54 #8A8A1F #1F8A54

split-complementary

#1F1F8A #8A541F #548A1F

monochromatic

#090926 #141458 #1F1F8A #2A2ABC #4C4CD7

Accessibility & contrast

On white

12.95

#1F1F8A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.62

#1F1F8A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F1F8A

12.95:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F1F8A	#FFFFFF	#000000	##FFFFFF
##1F1F8A	1.00	12.95	1.62	12.95
#FFFFFF	12.95	1.00	21.00	1.00
#000000	1.62	21.00	1.00	21.00
##FFFFFF	12.95	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00378D

Deuteranopia (green-blind)

#002C88

Tritanopia (blue-blind)

#003F53

Achromatopsia (no color)

#313131

Design tokens & code

CSS

--color: #1f1f8a;
/* rgb */ color: rgb(31, 31, 138);
/* oklch */ color: oklch(33.1% 0.170 272.2);

Tailwind

colors: {
  custom: {
    50: '#6e5cad',
    500: '#1f1f8a',
    950: '#000000',
  },
}

SCSS

$custom: #1f1f8a;
$custom-light: #6e5cad;
$custom-dark: #000000;

JSON

{
  "hex": "#1f1f8a",
  "rgb": {
    "r": 31,
    "g": 31,
    "b": 138
  },
  "hsl": {
    "h": 240,
    "s": 63.314,
    "l": 33.137
  },
  "oklch": {
    "l": 0.33051,
    "c": 0.1695,
    "h": 272.2
  },
  "luminance": 0.03106
}

Semantic roles & 50–950 ramp

primary

#1F1F8A

secondary

#BABA4B

accent

#E641E6

background

#F7F5FA

surface

#EDE9F4

border

#C8C5CE

text

#080410

muted

#7B797F

Preview Lab

Preview with #1F1F8A

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

Preview Lab → · Contrast checker → · Palette generator →