#1F188D#1F188D

#1F188D is a dark, vivid blue. Relative luminance 0.029; OKLCH L 32.5% C 0.180 H 272.7°. Best body text is #FFFFFF at 13.35:1 contrast (WCAG AA passes).

Color values

HEX	#1F188D
RGB	rgb(31, 24, 141)
HSL	hsl(244, 71%, 32%)
HSV	hsv(244, 83%, 55%)
CMYK	cmyk(78%, 83%, 0%, 44.7%)
CIE-LAB	lab(19.50, 42.65, -61.98)
CIE-LCH	lch(19.50, 75.24, 304.53°)
OKLab	oklab(32.48% 0.0084 -0.1793)
OKLCH	oklch(32.48% 0.18 272.7)
XYZ	xyz(5.6978, 2.8671, 25.4472)
Luminance	0.0287 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F188D #868D18

analogous

#184B8D #1F188D #5A188D

triadic

#1F188D #8D1F18 #188D1F

tetradic

#1F188D #8D184B #868D18 #188D5A

square

#1F188D #8D184B #868D18 #188D5A

split-complementary

#1F188D #8D5A18 #4B8D18

monochromatic

#080624 #140F59 #1F188D #2A21C1 #4A41DF

Accessibility & contrast

On white

13.35

#1F188D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.57

#1F188D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F188D

13.35:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F188D	#FFFFFF	#000000	##FFFFFF
##1F188D	1.00	13.35	1.57	13.35
#FFFFFF	13.35	1.00	21.00	1.00
#000000	1.57	21.00	1.00	21.00
##FFFFFF	13.35	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003590

Deuteranopia (green-blind)

#00298B

Tritanopia (blue-blind)

#003D53

Achromatopsia (no color)

#2F2F2F

Design tokens & code

CSS

--color: #1f188d;
/* rgb */ color: rgb(31, 24, 141);
/* oklch */ color: oklch(32.5% 0.180 272.7);

Tailwind

colors: {
  custom: {
    50: '#7058b0',
    500: '#1f188d',
    950: '#000000',
  },
}

SCSS

$custom: #1f188d;
$custom-light: #7058b0;
$custom-dark: #000000;

JSON

{
  "hex": "#1f188d",
  "rgb": {
    "r": 31,
    "g": 24,
    "b": 141
  },
  "hsl": {
    "h": 243.59,
    "s": 70.909,
    "l": 32.353
  },
  "oklch": {
    "l": 0.32482,
    "c": 0.17953,
    "h": 272.7
  },
  "luminance": 0.02868
}

Semantic roles & 50–950 ramp

primary

#1F188D

secondary

#B8BF42

accent

#EE3AE3

background

#F7F5FB

surface

#EDE9F6

border

#C8C5D0

text

#090411

muted

#7B7980

Preview Lab

Preview with #1F188D

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

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