#1F3A91#1F3A91

#1F3A91 is a dark, vivid blue. Relative luminance 0.054; OKLCH L 38.6% C 0.147 H 266.3°. Best body text is #FFFFFF at 10.13:1 contrast (WCAG AA passes).

Color values

HEX	#1F3A91
RGB	rgb(31, 58, 145)
HSL	hsl(226, 65%, 35%)
HSV	hsv(226, 79%, 57%)
CMYK	cmyk(78.6%, 60%, 0%, 43.1%)
CIE-LAB	lab(27.74, 22.90, -50.91)
CIE-LCH	lch(27.74, 55.83, 294.22°)
OKLab	oklab(38.56% -0.0096 -0.147)
OKLCH	oklch(38.56% 0.147 266.3)
XYZ	xyz(7.1872, 5.3609, 27.4386)
Luminance	0.0536 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F3A91 #91761F

analogous

#1F7391 #1F3A91 #3D1F91

triadic

#1F3A91 #911F3A #3A911F

tetradic

#1F3A91 #911F73 #91761F #1F913D

square

#1F3A91 #911F73 #91761F #1F913D

split-complementary

#1F3A91 #913D1F #73911F

monochromatic

#09122C #14265F #1F3A91 #2A4EC3 #5171DA

Accessibility & contrast

On white

10.13

#1F3A91 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.07

#1F3A91 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F3A91

10.13:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F3A91	#FFFFFF	#000000	##FFFFFF
##1F3A91	1.00	10.13	2.07	10.13
#FFFFFF	10.13	1.00	21.00	1.00
#000000	2.07	21.00	1.00	21.00
##FFFFFF	10.13	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004794

Deuteranopia (green-blind)

#003C8F

Tritanopia (blue-blind)

#00505F

Achromatopsia (no color)

#414141

Design tokens & code

CSS

--color: #1f3a91;
/* rgb */ color: rgb(31, 58, 145);
/* oklch */ color: oklch(38.6% 0.147 266.3);

Tailwind

colors: {
  custom: {
    50: '#6e6fb2',
    500: '#1f3a91',
    950: '#000000',
  },
}

SCSS

$custom: #1f3a91;
$custom-light: #6e6fb2;
$custom-dark: #000000;

JSON

{
  "hex": "#1f3a91",
  "rgb": {
    "r": 31,
    "g": 58,
    "b": 145
  },
  "hsl": {
    "h": 225.789,
    "s": 64.773,
    "l": 34.51
  },
  "oklch": {
    "l": 0.38563,
    "c": 0.14736,
    "h": 266.3
  },
  "luminance": 0.05362
}

Semantic roles & 50–950 ramp

primary

#1F3A91

secondary

#BDA34F

accent

#C040E8

background

#F7F6FB

surface

#EDECF6

border

#C8C7D0

text

#080711

muted

#7B7A80

Preview Lab

Preview with #1F3A91

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

Preview Lab → · Contrast checker → · Palette generator →