#1F3783#1F3783

#1F3783 is a dark, vivid blue. Relative luminance 0.047; OKLCH L 36.7% C 0.131 H 266.5°. Best body text is #FFFFFF at 10.87:1 contrast (WCAG AA passes).

Color values

HEX	#1F3783
RGB	rgb(31, 55, 131)
HSL	hsl(226, 62%, 32%)
HSV	hsv(226, 76%, 51%)
CMYK	cmyk(76.3%, 58%, 0%, 48.6%)
CIE-LAB	lab(25.75, 19.43, -45.47)
CIE-LCH	lch(25.75, 49.45, 293.14°)
OKLab	oklab(36.71% -0.0079 -0.1311)
OKLCH	oklch(36.71% 0.131 266.5)
XYZ	xyz(6.0266, 4.6617, 22.0505)
Luminance	0.0466 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F3783 #836B1F

analogous

#1F6983 #1F3783 #391F83

triadic

#1F3783 #831F37 #37831F

tetradic

#1F3783 #831F69 #836B1F #1F8339

square

#1F3783 #831F69 #836B1F #1F8339

split-complementary

#1F3783 #83391F #69831F

monochromatic

#080D20 #132252 #1F3783 #2B4CB4 #496AD4

Accessibility & contrast

On white

10.87

#1F3783 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.93

#1F3783 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F3783

10.87:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F3783	#FFFFFF	#000000	##FFFFFF
##1F3783	1.00	10.87	1.93	10.87
#FFFFFF	10.87	1.00	21.00	1.00
#000000	1.93	21.00	1.00	21.00
##FFFFFF	10.87	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004286

Deuteranopia (green-blind)

#003982

Tritanopia (blue-blind)

#004A57

Achromatopsia (no color)

#3D3D3D

Design tokens & code

CSS

--color: #1f3783;
/* rgb */ color: rgb(31, 55, 131);
/* oklch */ color: oklch(36.7% 0.131 266.5);

Tailwind

colors: {
  custom: {
    50: '#6a6da8',
    500: '#1f3783',
    950: '#000000',
  },
}

SCSS

$custom: #1f3783;
$custom-light: #6a6da8;
$custom-dark: #000000;

JSON

{
  "hex": "#1f3783",
  "rgb": {
    "r": 31,
    "g": 55,
    "b": 131
  },
  "hsl": {
    "h": 225.6,
    "s": 61.728,
    "l": 31.765
  },
  "oklch": {
    "l": 0.36709,
    "c": 0.13134,
    "h": 266.5
  },
  "luminance": 0.04662
}

Semantic roles & 50–950 ramp

primary

#1F3783

secondary

#B69B48

accent

#BE43E5

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#070710

muted

#7A7A7F

Preview Lab

Preview with #1F3783

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

Preview Lab → · Contrast checker → · Palette generator →