#1F2188#1F2188

#1F2188 is a dark, vivid blue. Relative luminance 0.032; OKLCH L 33.1% C 0.165 H 272.1°. Best body text is #FFFFFF at 12.87:1 contrast (WCAG AA passes).

Color values

HEX	#1F2188
RGB	rgb(31, 33, 136)
HSL	hsl(239, 63%, 33%)
HSV	hsv(239, 77%, 53%)
CMYK	cmyk(77.2%, 75.7%, 0%, 46.7%)
CIE-LAB	lab(20.66, 35.99, -56.94)
CIE-LCH	lch(20.66, 67.36, 302.29°)
OKLab	oklab(33.12% 0.006 -0.1648)
OKLCH	oklch(33.12% 0.165 272.1)
XYZ	xyz(5.5514, 3.1560, 23.6044)
Luminance	0.0316 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F2188 #88861F

analogous

#1F5588 #1F2188 #511F88

triadic

#1F2188 #881F21 #21881F

tetradic

#1F2188 #881F55 #88861F #1F8851

square

#1F2188 #881F55 #88861F #1F8851

split-complementary

#1F2188 #88511F #55881F

monochromatic

#080924 #141556 #1F2188 #2A2DBA #4B4ED6

Accessibility & contrast

On white

12.87

#1F2188 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.63

#1F2188 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F2188

12.87:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F2188	#FFFFFF	#000000	##FFFFFF
##1F2188	1.00	12.87	1.63	12.87
#FFFFFF	12.87	1.00	21.00	1.00
#000000	1.63	21.00	1.00	21.00
##FFFFFF	12.87	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00378B

Deuteranopia (green-blind)

#002D86

Tritanopia (blue-blind)

#003F52

Achromatopsia (no color)

#323232

Design tokens & code

CSS

--color: #1f2188;
/* rgb */ color: rgb(31, 33, 136);
/* oklch */ color: oklch(33.1% 0.165 272.1);

Tailwind

colors: {
  custom: {
    50: '#6e5dac',
    500: '#1f2188',
    950: '#000000',
  },
}

SCSS

$custom: #1f2188;
$custom-light: #6e5dac;
$custom-dark: #000000;

JSON

{
  "hex": "#1f2188",
  "rgb": {
    "r": 31,
    "g": 33,
    "b": 136
  },
  "hsl": {
    "h": 238.857,
    "s": 62.874,
    "l": 32.745
  },
  "oklch": {
    "l": 0.33123,
    "c": 0.16492,
    "h": 272.1
  },
  "luminance": 0.03157
}

Semantic roles & 50–950 ramp

primary

#1F2188

secondary

#B9B74A

accent

#E342E6

background

#F7F5FA

surface

#EDE9F4

border

#C8C5CE

text

#080410

muted

#7B797F

Preview Lab

Preview with #1F2188

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

Preview Lab → · Contrast checker → · Palette generator →