#1F3983#1F3983

#1F3983 is a dark, vivid blue. Relative luminance 0.049; OKLCH L 37.1% C 0.129 H 265.7°. Best body text is #FFFFFF at 10.65:1 contrast (WCAG AA passes).

Color values

HEX	#1F3983
RGB	rgb(31, 57, 131)
HSL	hsl(224, 62%, 32%)
HSV	hsv(224, 76%, 51%)
CMYK	cmyk(76.3%, 56.5%, 0%, 48.6%)
CIE-LAB	lab(26.32, 18.03, -44.54)
CIE-LCH	lch(26.32, 48.05, 292.04°)
OKLab	oklab(37.14% -0.0096 -0.1283)
OKLCH	oklch(37.14% 0.129 265.7)
XYZ	xyz(6.1235, 4.8556, 22.0828)
Luminance	0.0486 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F3983 #83691F

analogous

#1F6B83 #1F3983 #371F83

triadic

#1F3983 #831F39 #39831F

tetradic

#1F3983 #831F6B #83691F #1F8337

square

#1F3983 #831F6B #83691F #1F8337

split-complementary

#1F3983 #83371F #6B831F

monochromatic

#080E20 #132352 #1F3983 #2B4FB4 #496DD4

Accessibility & contrast

On white

10.65

#1F3983 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.97

#1F3983 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F3983

10.65:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F3983	#FFFFFF	#000000	##FFFFFF
##1F3983	1.00	10.65	1.97	10.65
#FFFFFF	10.65	1.00	21.00	1.00
#000000	1.97	21.00	1.00	21.00
##FFFFFF	10.65	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004386

Deuteranopia (green-blind)

#003A82

Tritanopia (blue-blind)

#004B58

Achromatopsia (no color)

#3E3E3E

Design tokens & code

CSS

--color: #1f3983;
/* rgb */ color: rgb(31, 57, 131);
/* oklch */ color: oklch(37.1% 0.129 265.7);

Tailwind

colors: {
  custom: {
    50: '#6a6ea8',
    500: '#1f3983',
    950: '#000000',
  },
}

SCSS

$custom: #1f3983;
$custom-light: #6a6ea8;
$custom-dark: #000000;

JSON

{
  "hex": "#1f3983",
  "rgb": {
    "r": 31,
    "g": 57,
    "b": 131
  },
  "hsl": {
    "h": 224.4,
    "s": 61.728,
    "l": 31.765
  },
  "oklch": {
    "l": 0.37139,
    "c": 0.1287,
    "h": 265.7
  },
  "luminance": 0.04856
}

Semantic roles & 50–950 ramp

primary

#1F3983

secondary

#B69948

accent

#BB43E5

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#070710

muted

#7A7A7F

Preview Lab

Preview with #1F3983

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

Preview Lab → · Contrast checker → · Palette generator →