#1F1B8A#1F1B8A

#1F1B8A is a dark, vivid blue. Relative luminance 0.029; OKLCH L 32.5% C 0.173 H 272.7°. Best body text is #FFFFFF at 13.27:1 contrast (WCAG AA passes).

Color values

HEX	#1F1B8A
RGB	rgb(31, 27, 138)
HSL	hsl(242, 67%, 32%)
HSV	hsv(242, 80%, 54%)
CMYK	cmyk(77.5%, 80.4%, 0%, 45.9%)
CIE-LAB	lab(19.68, 40.11, -59.82)
CIE-LCH	lch(19.68, 72.02, 303.84°)
OKLab	oklab(32.5% 0.0081 -0.1731)
OKLCH	oklch(32.5% 0.173 272.7)
XYZ	xyz(5.5429, 2.9096, 24.3093)
Luminance	0.0291 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F1B8A #868A1B

analogous

#1B4F8A #1F1B8A #561B8A

triadic

#1F1B8A #8A1F1B #1B8A1F

tetradic

#1F1B8A #8A1B4F #868A1B #1B8A56

square

#1F1B8A #8A1B4F #868A1B #1B8A56

split-complementary

#1F1B8A #8A561B #4F8A1B

monochromatic

#080724 #141157 #1F1B8A #2A25BD #4A45DB

Accessibility & contrast

On white

13.27

#1F1B8A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.58

#1F1B8A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F1B8A

13.27:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F1B8A	#FFFFFF	#000000	##FFFFFF
##1F1B8A	1.00	13.27	1.58	13.27
#FFFFFF	13.27	1.00	21.00	1.00
#000000	1.58	21.00	1.00	21.00
##FFFFFF	13.27	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00358D

Deuteranopia (green-blind)

#002A88

Tritanopia (blue-blind)

#003D52

Achromatopsia (no color)

#303030

Design tokens & code

CSS

--color: #1f1b8a;
/* rgb */ color: rgb(31, 27, 138);
/* oklch */ color: oklch(32.5% 0.173 272.7);

Tailwind

colors: {
  custom: {
    50: '#6f5aad',
    500: '#1f1b8a',
    950: '#000000',
  },
}

SCSS

$custom: #1f1b8a;
$custom-light: #6f5aad;
$custom-dark: #000000;

JSON

{
  "hex": "#1f1b8a",
  "rgb": {
    "r": 31,
    "g": 27,
    "b": 138
  },
  "hsl": {
    "h": 242.162,
    "s": 67.273,
    "l": 32.353
  },
  "oklch": {
    "l": 0.32499,
    "c": 0.17329,
    "h": 272.7
  },
  "luminance": 0.0291
}

Semantic roles & 50–950 ramp

primary

#1F1B8A

secondary

#B8BC45

accent

#EA3EE4

background

#F7F5FA

surface

#EDE9F4

border

#C8C5CE

text

#090410

muted

#7B797F

Preview Lab

Preview with #1F1B8A

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

Preview Lab → · Contrast checker → · Palette generator →