#1F3F89#1F3F89

#1F3F89 is a dark, vivid blue. Relative luminance 0.057; OKLCH L 38.9% C 0.130 H 263.8°. Best body text is #FFFFFF at 9.86:1 contrast (WCAG AA passes).

Color values

HEX	#1F3F89
RGB	rgb(31, 63, 137)
HSL	hsl(222, 63%, 33%)
HSV	hsv(222, 77%, 54%)
CMYK	cmyk(77.4%, 54%, 0%, 46.3%)
CIE-LAB	lab(28.52, 16.26, -44.71)
CIE-LCH	lch(28.52, 47.58, 289.98°)
OKLab	oklab(38.95% -0.014 -0.1287)
OKLCH	oklch(38.95% 0.13 263.8)
XYZ	xyz(6.8563, 5.6517, 24.3916)
Luminance	0.0565 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F3F89 #89691F

analogous

#1F7489 #1F3F89 #341F89

triadic

#1F3F89 #891F3F #3F891F

tetradic

#1F3F89 #891F74 #89691F #1F8934

square

#1F3F89 #891F74 #89691F #1F8934

split-complementary

#1F3F89 #89341F #74891F

monochromatic

#081125 #142857 #1F3F89 #2A56BB #4C76D6

Accessibility & contrast

On white

9.86

#1F3F89 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.13

#1F3F89 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F3F89

9.86:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F3F89	#FFFFFF	#000000	##FFFFFF
##1F3F89	1.00	9.86	2.13	9.86
#FFFFFF	9.86	1.00	21.00	1.00
#000000	2.13	21.00	1.00	21.00
##FFFFFF	9.86	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0A488C

Deuteranopia (green-blind)

#003F88

Tritanopia (blue-blind)

#00515D

Achromatopsia (no color)

#434343

Design tokens & code

CSS

--color: #1f3f89;
/* rgb */ color: rgb(31, 63, 137);
/* oklch */ color: oklch(38.9% 0.130 263.8);

Tailwind

colors: {
  custom: {
    50: '#6b73ac',
    500: '#1f3f89',
    950: '#000000',
  },
}

SCSS

$custom: #1f3f89;
$custom-light: #6b73ac;
$custom-dark: #000000;

JSON

{
  "hex": "#1f3f89",
  "rgb": {
    "r": 31,
    "g": 63,
    "b": 137
  },
  "hsl": {
    "h": 221.887,
    "s": 63.095,
    "l": 32.941
  },
  "oklch": {
    "l": 0.38948,
    "c": 0.1295,
    "h": 263.8
  },
  "luminance": 0.05652
}

Semantic roles & 50–950 ramp

primary

#1F3F89

secondary

#B9984B

accent

#B442E6

background

#F6F6FA

surface

#ECECF4

border

#C7C7CE

text

#080810

muted

#7A7B7F

Preview Lab

Preview with #1F3F89

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

Preview Lab → · Contrast checker → · Palette generator →