#1F188C#1F188C

#1F188C is a dark, vivid blue. Relative luminance 0.028; OKLCH L 32.4% C 0.178 H 272.8°. Best body text is #FFFFFF at 13.40:1 contrast (WCAG AA passes).

Color values

HEX	#1F188C
RGB	rgb(31, 24, 140)
HSL	hsl(244, 71%, 32%)
HSV	hsv(244, 83%, 55%)
CMYK	cmyk(77.9%, 82.9%, 0%, 45.1%)
CIE-LAB	lab(19.38, 42.33, -61.56)
CIE-LCH	lch(19.38, 74.71, 304.51°)
OKLab	oklab(32.36% 0.0086 -0.1781)
OKLCH	oklch(32.36% 0.178 272.8)
XYZ	xyz(5.6237, 2.8374, 25.0571)
Luminance	0.0284 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F188C #858C18

analogous

#184B8C #1F188C #59188C

triadic

#1F188C #8C1F18 #188C1F

tetradic

#1F188C #8C184B #858C18 #188C59

square

#1F188C #8C184B #858C18 #188C59

split-complementary

#1F188C #8C5918 #4B8C18

monochromatic

#080624 #130F58 #1F188C #2B21C0 #4A40DE

Accessibility & contrast

On white

13.40

#1F188C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.57

#1F188C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F188C

13.40:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F188C	#FFFFFF	#000000	##FFFFFF
##1F188C	1.00	13.40	1.57	13.40
#FFFFFF	13.40	1.00	21.00	1.00
#000000	1.57	21.00	1.00	21.00
##FFFFFF	13.40	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00348F

Deuteranopia (green-blind)

#00298A

Tritanopia (blue-blind)

#003D53

Achromatopsia (no color)

#2F2F2F

Design tokens & code

CSS

--color: #1f188c;
/* rgb */ color: rgb(31, 24, 140);
/* oklch */ color: oklch(32.4% 0.178 272.8);

Tailwind

colors: {
  custom: {
    50: '#6f58af',
    500: '#1f188c',
    950: '#000000',
  },
}

SCSS

$custom: #1f188c;
$custom-light: #6f58af;
$custom-dark: #000000;

JSON

{
  "hex": "#1f188c",
  "rgb": {
    "r": 31,
    "g": 24,
    "b": 140
  },
  "hsl": {
    "h": 243.621,
    "s": 70.732,
    "l": 32.157
  },
  "oklch": {
    "l": 0.32362,
    "c": 0.17832,
    "h": 272.8
  },
  "luminance": 0.02838
}

Semantic roles & 50–950 ramp

primary

#1F188C

secondary

#B7BF41

accent

#ED3AE3

background

#F7F5FA

surface

#EDE9F5

border

#C8C5CF

text

#090311

muted

#7B7880

Preview Lab

Preview with #1F188C

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

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