#1F188A#1F188A

#1F188A is a dark, vivid blue. Relative luminance 0.028; OKLCH L 32.1% C 0.176 H 273.0°. Best body text is #FFFFFF at 13.50:1 contrast (WCAG AA passes).

Color values

HEX	#1F188A
RGB	rgb(31, 24, 138)
HSL	hsl(244, 70%, 32%)
HSV	hsv(244, 83%, 54%)
CMYK	cmyk(77.5%, 82.6%, 0%, 45.9%)
CIE-LAB	lab(19.14, 41.68, -60.71)
CIE-LCH	lch(19.14, 73.65, 304.47°)
OKLab	oklab(32.12% 0.0092 -0.1757)
OKLCH	oklch(32.12% 0.176 273)
XYZ	xyz(5.4776, 2.7790, 24.2875)
Luminance	0.0278 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F188A #838A18

analogous

#184A8A #1F188A #58188A

triadic

#1F188A #8A1F18 #188A1F

tetradic

#1F188A #8A184A #838A18 #188A58

square

#1F188A #8A184A #838A18 #188A58

split-complementary

#1F188A #8A5818 #4A8A18

monochromatic

#080622 #130F56 #1F188A #2B21BE #493FDE

Accessibility & contrast

On white

13.50

#1F188A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.56

#1F188A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F188A

13.50:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F188A	#FFFFFF	#000000	##FFFFFF
##1F188A	1.00	13.50	1.56	13.50
#FFFFFF	13.50	1.00	21.00	1.00
#000000	1.56	21.00	1.00	21.00
##FFFFFF	13.50	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00348D

Deuteranopia (green-blind)

#002988

Tritanopia (blue-blind)

#003C52

Achromatopsia (no color)

#2E2E2E

Design tokens & code

CSS

--color: #1f188a;
/* rgb */ color: rgb(31, 24, 138);
/* oklch */ color: oklch(32.1% 0.176 273.0);

Tailwind

colors: {
  custom: {
    50: '#6f58ad',
    500: '#1f188a',
    950: '#000000',
  },
}

SCSS

$custom: #1f188a;
$custom-light: #6f58ad;
$custom-dark: #000000;

JSON

{
  "hex": "#1f188a",
  "rgb": {
    "r": 31,
    "g": 24,
    "b": 138
  },
  "hsl": {
    "h": 243.684,
    "s": 70.37,
    "l": 31.765
  },
  "oklch": {
    "l": 0.32121,
    "c": 0.1759,
    "h": 273
  },
  "luminance": 0.0278
}

Semantic roles & 50–950 ramp

primary

#1F188A

secondary

#B6BD40

accent

#ED3BE2

background

#F7F5FA

surface

#EDE9F4

border

#C8C5CE

text

#090310

muted

#7B787F

Preview Lab

Preview with #1F188A

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

Preview Lab → · Contrast checker → · Palette generator →