#1F3189#1F3189

#1F3189 is a dark, vivid blue. Relative luminance 0.043; OKLCH L 36.0% C 0.148 H 268.7°. Best body text is #FFFFFF at 11.30:1 contrast (WCAG AA passes).

Color values

HEX	#1F3189
RGB	rgb(31, 49, 137)
HSL	hsl(230, 63%, 33%)
HSV	hsv(230, 77%, 54%)
CMYK	cmyk(77.4%, 64.2%, 0%, 46.3%)
CIE-LAB	lab(24.62, 25.95, -51.06)
CIE-LCH	lch(24.62, 57.27, 296.94°)
OKLab	oklab(36.03% -0.0034 -0.1476)
OKLCH	oklch(36.03% 0.148 268.7)
XYZ	xyz(6.1772, 4.2934, 24.1652)
Luminance	0.0429 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F3189 #89771F

analogous

#1F6689 #1F3189 #421F89

triadic

#1F3189 #891F31 #31891F

tetradic

#1F3189 #891F66 #89771F #1F8942

square

#1F3189 #891F66 #89771F #1F8942

split-complementary

#1F3189 #89421F #66891F

monochromatic

#080D25 #141F57 #1F3189 #2A43BB #4C63D6

Accessibility & contrast

On white

11.30

#1F3189 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.86

#1F3189 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F3189

11.30:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F3189	#FFFFFF	#000000	##FFFFFF
##1F3189	1.00	11.30	1.86	11.30
#FFFFFF	11.30	1.00	21.00	1.00
#000000	1.86	21.00	1.00	21.00
##FFFFFF	11.30	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00408C

Deuteranopia (green-blind)

#003687

Tritanopia (blue-blind)

#004858

Achromatopsia (no color)

#3A3A3A

Design tokens & code

CSS

--color: #1f3189;
/* rgb */ color: rgb(31, 49, 137);
/* oklch */ color: oklch(36.0% 0.148 268.7);

Tailwind

colors: {
  custom: {
    50: '#6c69ac',
    500: '#1f3189',
    950: '#000000',
  },
}

SCSS

$custom: #1f3189;
$custom-light: #6c69ac;
$custom-dark: #000000;

JSON

{
  "hex": "#1f3189",
  "rgb": {
    "r": 31,
    "g": 49,
    "b": 137
  },
  "hsl": {
    "h": 229.811,
    "s": 63.095,
    "l": 32.941
  },
  "oklch": {
    "l": 0.36027,
    "c": 0.14763,
    "h": 268.7
  },
  "luminance": 0.04294
}

Semantic roles & 50–950 ramp

primary

#1F3189

secondary

#B9A64B

accent

#CA42E6

background

#F7F6FA

surface

#EDEBF4

border

#C8C6CE

text

#080610

muted

#7B7A7F

Preview Lab

Preview with #1F3189

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

Preview Lab → · Contrast checker → · Palette generator →