#1F3A84#1F3A84

#1F3A84 is a dark, vivid blue. Relative luminance 0.050; OKLCH L 37.4% C 0.129 H 265.4°. Best body text is #FFFFFF at 10.52:1 contrast (WCAG AA passes).

Color values

HEX	#1F3A84
RGB	rgb(31, 58, 132)
HSL	hsl(224, 62%, 32%)
HSV	hsv(224, 77%, 52%)
CMYK	cmyk(76.5%, 56.1%, 0%, 48.2%)
CIE-LAB	lab(26.69, 17.73, -44.57)
CIE-LCH	lch(26.69, 47.97, 291.70°)
OKLab	oklab(37.44% -0.0103 -0.1284)
OKLCH	oklch(37.44% 0.129 265.4)
XYZ	xyz(6.2415, 4.9827, 22.4581)
Luminance	0.0498 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F3A84 #84691F

analogous

#1F6D84 #1F3A84 #361F84

triadic

#1F3A84 #841F3A #3A841F

tetradic

#1F3A84 #841F6D #84691F #1F8436

square

#1F3A84 #841F6D #84691F #1F8436

split-complementary

#1F3A84 #84361F #6D841F

monochromatic

#080E21 #132452 #1F3A84 #2B50B6 #496ED4

Accessibility & contrast

On white

10.52

#1F3A84 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.00

#1F3A84 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F3A84

10.52:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F3A84	#FFFFFF	#000000	##FFFFFF
##1F3A84	1.00	10.52	2.00	10.52
#FFFFFF	10.52	1.00	21.00	1.00
#000000	2.00	21.00	1.00	21.00
##FFFFFF	10.52	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004487

Deuteranopia (green-blind)

#003B83

Tritanopia (blue-blind)

#004C59

Achromatopsia (no color)

#3F3F3F

Design tokens & code

CSS

--color: #1f3a84;
/* rgb */ color: rgb(31, 58, 132);
/* oklch */ color: oklch(37.4% 0.129 265.4);

Tailwind

colors: {
  custom: {
    50: '#6a6fa8',
    500: '#1f3a84',
    950: '#000000',
  },
}

SCSS

$custom: #1f3a84;
$custom-light: #6a6fa8;
$custom-dark: #000000;

JSON

{
  "hex": "#1f3a84",
  "rgb": {
    "r": 31,
    "g": 58,
    "b": 132
  },
  "hsl": {
    "h": 223.96,
    "s": 61.963,
    "l": 31.961
  },
  "oklch": {
    "l": 0.3744,
    "c": 0.12883,
    "h": 265.4
  },
  "luminance": 0.04983
}

Semantic roles & 50–950 ramp

primary

#1F3A84

secondary

#B79948

accent

#BA43E5

background

#F6F6FA

surface

#ECECF4

border

#C7C7CE

text

#070710

muted

#7A7A7F

Preview Lab

Preview with #1F3A84

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

Preview Lab → · Contrast checker → · Palette generator →