#1F3883#1F3883

#1F3883 is a dark, vivid blue. Relative luminance 0.048; OKLCH L 36.9% C 0.130 H 266.1°. Best body text is #FFFFFF at 10.76:1 contrast (WCAG AA passes).

Color values

HEX	#1F3883
RGB	rgb(31, 56, 131)
HSL	hsl(225, 62%, 32%)
HSV	hsv(225, 76%, 51%)
CMYK	cmyk(76.3%, 57.3%, 0%, 48.6%)
CIE-LAB	lab(26.03, 18.73, -45.01)
CIE-LCH	lch(26.03, 48.75, 292.60°)
OKLab	oklab(36.92% -0.0088 -0.1297)
OKLCH	oklch(36.92% 0.13 266.1)
XYZ	xyz(6.0745, 4.7577, 22.0665)
Luminance	0.0476 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F3883 #836A1F

analogous

#1F6A83 #1F3883 #381F83

triadic

#1F3883 #831F38 #38831F

tetradic

#1F3883 #831F6A #836A1F #1F8338

square

#1F3883 #831F6A #836A1F #1F8338

split-complementary

#1F3883 #83381F #6A831F

monochromatic

#080E20 #132352 #1F3883 #2B4DB4 #496BD4

Accessibility & contrast

On white

10.76

#1F3883 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.95

#1F3883 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F3883

10.76:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F3883	#FFFFFF	#000000	##FFFFFF
##1F3883	1.00	10.76	1.95	10.76
#FFFFFF	10.76	1.00	21.00	1.00
#000000	1.95	21.00	1.00	21.00
##FFFFFF	10.76	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004286

Deuteranopia (green-blind)

#003982

Tritanopia (blue-blind)

#004A57

Achromatopsia (no color)

#3E3E3E

Design tokens & code

CSS

--color: #1f3883;
/* rgb */ color: rgb(31, 56, 131);
/* oklch */ color: oklch(36.9% 0.130 266.1);

Tailwind

colors: {
  custom: {
    50: '#6a6ea8',
    500: '#1f3883',
    950: '#000000',
  },
}

SCSS

$custom: #1f3883;
$custom-light: #6a6ea8;
$custom-dark: #000000;

JSON

{
  "hex": "#1f3883",
  "rgb": {
    "r": 31,
    "g": 56,
    "b": 131
  },
  "hsl": {
    "h": 225,
    "s": 61.728,
    "l": 31.765
  },
  "oklch": {
    "l": 0.36923,
    "c": 0.13002,
    "h": 266.1
  },
  "luminance": 0.04758
}

Semantic roles & 50–950 ramp

primary

#1F3883

secondary

#B69A48

accent

#BC43E5

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#070710

muted

#7A7A7F

Preview Lab

Preview with #1F3883

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

Preview Lab → · Contrast checker → · Palette generator →