#1F3F82#1F3F82

#1F3F82 is a dark, moderate blue. Relative luminance 0.055; OKLCH L 38.4% C 0.119 H 262.9°. Best body text is #FFFFFF at 10.04:1 contrast (WCAG AA passes).

Color values

HEX	#1F3F82
RGB	rgb(31, 63, 130)
HSL	hsl(221, 61%, 32%)
HSV	hsv(221, 76%, 51%)
CMYK	cmyk(76.2%, 51.5%, 0%, 49%)
CIE-LAB	lab(28.00, 13.45, -41.20)
CIE-LCH	lch(28.00, 43.34, 288.08°)
OKLab	oklab(38.39% -0.0148 -0.1184)
OKLCH	oklch(38.39% 0.119 262.9)
XYZ	xyz(6.3704, 5.4573, 21.8324)
Luminance	0.0546 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F3F82 #82621F

analogous

#1F7182 #1F3F82 #311F82

triadic

#1F3F82 #821F3F #3F821F

tetradic

#1F3F82 #821F71 #82621F #1F8231

square

#1F3F82 #821F71 #82621F #1F8231

split-complementary

#1F3F82 #82311F #71821F

monochromatic

#070F1F #132751 #1F3F82 #2B57B3 #4875D3

Accessibility & contrast

On white

10.04

#1F3F82 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.09

#1F3F82 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F3F82

10.04:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F3F82	#FFFFFF	#000000	##FFFFFF
##1F3F82	1.00	10.04	2.09	10.04
#FFFFFF	10.04	1.00	21.00	1.00
#000000	2.09	21.00	1.00	21.00
##FFFFFF	10.04	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#174784

Deuteranopia (green-blind)

#003E81

Tritanopia (blue-blind)

#004F5A

Achromatopsia (no color)

#424242

Design tokens & code

CSS

--color: #1f3f82;
/* rgb */ color: rgb(31, 63, 130);
/* oklch */ color: oklch(38.4% 0.119 262.9);

Tailwind

colors: {
  custom: {
    50: '#6973a7',
    500: '#1f3f82',
    950: '#000000',
  },
}

SCSS

$custom: #1f3f82;
$custom-light: #6973a7;
$custom-dark: #000000;

JSON

{
  "hex": "#1f3f82",
  "rgb": {
    "r": 31,
    "g": 63,
    "b": 130
  },
  "hsl": {
    "h": 220.606,
    "s": 61.491,
    "l": 31.569
  },
  "oklch": {
    "l": 0.38391,
    "c": 0.11933,
    "h": 262.9
  },
  "luminance": 0.05458
}

Semantic roles & 50–950 ramp

primary

#1F3F82

secondary

#B59248

accent

#B043E5

background

#F6F6FA

surface

#ECECF4

border

#C7C7CE

text

#07080F

muted

#7A7B7F

Preview Lab

Preview with #1F3F82

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

Preview Lab → · Contrast checker → · Palette generator →