#1F3683#1F3683

#1F3683 is a dark, vivid blue. Relative luminance 0.046; OKLCH L 36.5% C 0.133 H 266.9°. Best body text is #FFFFFF at 10.97:1 contrast (WCAG AA passes).

Color values

HEX	#1F3683
RGB	rgb(31, 54, 131)
HSL	hsl(226, 62%, 32%)
HSV	hsv(226, 76%, 51%)
CMYK	cmyk(76.3%, 58.8%, 0%, 48.6%)
CIE-LAB	lab(25.47, 20.13, -45.93)
CIE-LCH	lch(25.47, 50.14, 293.66°)
OKLab	oklab(36.5% -0.0071 -0.1325)
OKLCH	oklch(36.5% 0.133 266.9)
XYZ	xyz(5.9795, 4.5677, 22.0348)
Luminance	0.0457 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F3683 #836C1F

analogous

#1F6883 #1F3683 #3A1F83

triadic

#1F3683 #831F36 #36831F

tetradic

#1F3683 #831F68 #836C1F #1F833A

square

#1F3683 #831F68 #836C1F #1F833A

split-complementary

#1F3683 #833A1F #68831F

monochromatic

#080D20 #132252 #1F3683 #2B4AB4 #4969D4

Accessibility & contrast

On white

10.97

#1F3683 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.91

#1F3683 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F3683

10.97:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F3683	#FFFFFF	#000000	##FFFFFF
##1F3683	1.00	10.97	1.91	10.97
#FFFFFF	10.97	1.00	21.00	1.00
#000000	1.91	21.00	1.00	21.00
##FFFFFF	10.97	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004186

Deuteranopia (green-blind)

#003881

Tritanopia (blue-blind)

#004957

Achromatopsia (no color)

#3C3C3C

Design tokens & code

CSS

--color: #1f3683;
/* rgb */ color: rgb(31, 54, 131);
/* oklch */ color: oklch(36.5% 0.133 266.9);

Tailwind

colors: {
  custom: {
    50: '#6a6ca8',
    500: '#1f3683',
    950: '#000000',
  },
}

SCSS

$custom: #1f3683;
$custom-light: #6a6ca8;
$custom-dark: #000000;

JSON

{
  "hex": "#1f3683",
  "rgb": {
    "r": 31,
    "g": 54,
    "b": 131
  },
  "hsl": {
    "h": 226.2,
    "s": 61.728,
    "l": 31.765
  },
  "oklch": {
    "l": 0.36497,
    "c": 0.13266,
    "h": 266.9
  },
  "luminance": 0.04568
}

Semantic roles & 50–950 ramp

primary

#1F3683

secondary

#B69D48

accent

#C043E5

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#070710

muted

#7A7A7F

Preview Lab

Preview with #1F3683

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

Preview Lab → · Contrast checker → · Palette generator →