#1F2A8A#1F2A8A

#1F2A8A is a dark, vivid blue. Relative luminance 0.038; OKLCH L 34.8% C 0.158 H 270.3°. Best body text is #FFFFFF at 11.96:1 contrast (WCAG AA passes).

Color values

HEX	#1F2A8A
RGB	rgb(31, 42, 138)
HSL	hsl(234, 63%, 33%)
HSV	hsv(234, 78%, 54%)
CMYK	cmyk(77.5%, 69.6%, 0%, 45.9%)
CIE-LAB	lab(22.94, 31.03, -54.44)
CIE-LCH	lch(22.94, 62.66, 299.68°)
OKLab	oklab(34.82% 0.0009 -0.1575)
OKLCH	oklch(34.82% 0.158 270.3)
XYZ	xyz(5.9789, 3.7816, 24.4546)
Luminance	0.0378 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F2A8A #8A7F1F

analogous

#1F5F8A #1F2A8A #491F8A

triadic

#1F2A8A #8A1F2A #2A8A1F

tetradic

#1F2A8A #8A1F5F #8A7F1F #1F8A49

square

#1F2A8A #8A1F5F #8A7F1F #1F8A49

split-complementary

#1F2A8A #8A491F #5F8A1F

monochromatic

#090C26 #141B58 #1F2A8A #2A39BC #4C5BD7

Accessibility & contrast

On white

11.96

#1F2A8A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.76

#1F2A8A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F2A8A

11.96:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F2A8A	#FFFFFF	#000000	##FFFFFF
##1F2A8A	1.00	11.96	1.76	11.96
#FFFFFF	11.96	1.00	21.00	1.00
#000000	1.76	21.00	1.00	21.00
##FFFFFF	11.96	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003C8D

Deuteranopia (green-blind)

#003288

Tritanopia (blue-blind)

#004456

Achromatopsia (no color)

#373737

Design tokens & code

CSS

--color: #1f2a8a;
/* rgb */ color: rgb(31, 42, 138);
/* oklch */ color: oklch(34.8% 0.158 270.3);

Tailwind

colors: {
  custom: {
    50: '#6d64ad',
    500: '#1f2a8a',
    950: '#000000',
  },
}

SCSS

$custom: #1f2a8a;
$custom-light: #6d64ad;
$custom-dark: #000000;

JSON

{
  "hex": "#1f2a8a",
  "rgb": {
    "r": 31,
    "g": 42,
    "b": 138
  },
  "hsl": {
    "h": 233.832,
    "s": 63.314,
    "l": 33.137
  },
  "oklch": {
    "l": 0.34824,
    "c": 0.15754,
    "h": 270.3
  },
  "luminance": 0.03782
}

Semantic roles & 50–950 ramp

primary

#1F2A8A

secondary

#BAAE4B

accent

#D541E6

background

#F7F5FA

surface

#EDEAF4

border

#C8C6CE

text

#080510

muted

#7B797F

Preview Lab

Preview with #1F2A8A

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

Preview Lab → · Contrast checker → · Palette generator →