#1F408A#1F408A

#1F408A is a dark, vivid blue. Relative luminance 0.058; OKLCH L 39.3% C 0.130 H 263.5°. Best body text is #FFFFFF at 9.73:1 contrast (WCAG AA passes).

Color values

HEX	#1F408A
RGB	rgb(31, 64, 138)
HSL	hsl(221, 63%, 33%)
HSV	hsv(221, 78%, 54%)
CMYK	cmyk(77.5%, 53.6%, 0%, 45.9%)
CIE-LAB	lab(28.88, 15.97, -44.74)
CIE-LCH	lch(28.88, 47.50, 289.64°)
OKLab	oklab(39.25% -0.0147 -0.1288)
OKLCH	oklch(39.25% 0.13 263.5)
XYZ	xyz(6.9843, 5.7923, 24.7898)
Luminance	0.0579 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F408A #8A691F

analogous

#1F758A #1F408A #331F8A

triadic

#1F408A #8A1F40 #408A1F

tetradic

#1F408A #8A1F75 #8A691F #1F8A33

square

#1F408A #8A1F75 #8A691F #1F8A33

split-complementary

#1F408A #8A331F #758A1F

monochromatic

#091226 #142958 #1F408A #2A57BC #4C77D7

Accessibility & contrast

On white

9.73

#1F408A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.16

#1F408A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F408A

9.73:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F408A	#FFFFFF	#000000	##FFFFFF
##1F408A	1.00	9.73	2.16	9.73
#FFFFFF	9.73	1.00	21.00	1.00
#000000	2.16	21.00	1.00	21.00
##FFFFFF	9.73	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0D498D

Deuteranopia (green-blind)

#003F89

Tritanopia (blue-blind)

#00525E

Achromatopsia (no color)

#444444

Design tokens & code

CSS

--color: #1f408a;
/* rgb */ color: rgb(31, 64, 138);
/* oklch */ color: oklch(39.3% 0.130 263.5);

Tailwind

colors: {
  custom: {
    50: '#6b74ad',
    500: '#1f408a',
    950: '#000000',
  },
}

SCSS

$custom: #1f408a;
$custom-light: #6b74ad;
$custom-dark: #000000;

JSON

{
  "hex": "#1f408a",
  "rgb": {
    "r": 31,
    "g": 64,
    "b": 138
  },
  "hsl": {
    "h": 221.495,
    "s": 63.314,
    "l": 33.137
  },
  "oklch": {
    "l": 0.3925,
    "c": 0.12964,
    "h": 263.5
  },
  "luminance": 0.05793
}

Semantic roles & 50–950 ramp

primary

#1F408A

secondary

#BA984B

accent

#B341E6

background

#F6F7FA

surface

#ECEDF4

border

#C7C8CE

text

#080810

muted

#7A7B7F

Preview Lab

Preview with #1F408A

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

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