#1F3289#1F3289

#1F3289 is a dark, vivid blue. Relative luminance 0.044; OKLCH L 36.2% C 0.146 H 268.4°. Best body text is #FFFFFF at 11.20:1 contrast (WCAG AA passes).

Color values

HEX	#1F3289
RGB	rgb(31, 50, 137)
HSL	hsl(229, 63%, 33%)
HSV	hsv(229, 77%, 54%)
CMYK	cmyk(77.4%, 63.5%, 0%, 46.3%)
CIE-LAB	lab(24.88, 25.26, -50.62)
CIE-LCH	lch(24.88, 56.58, 296.52°)
OKLab	oklab(36.22% -0.0041 -0.1463)
OKLCH	oklch(36.22% 0.146 268.4)
XYZ	xyz(6.2195, 4.3780, 24.1793)
Luminance	0.0438 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F3289 #89761F

analogous

#1F6789 #1F3289 #411F89

triadic

#1F3289 #891F32 #32891F

tetradic

#1F3289 #891F67 #89761F #1F8941

square

#1F3289 #891F67 #89761F #1F8941

split-complementary

#1F3289 #89411F #67891F

monochromatic

#080E25 #142057 #1F3289 #2A44BB #4C65D6

Accessibility & contrast

On white

11.20

#1F3289 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.88

#1F3289 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F3289

11.20:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F3289	#FFFFFF	#000000	##FFFFFF
##1F3289	1.00	11.20	1.88	11.20
#FFFFFF	11.20	1.00	21.00	1.00
#000000	1.88	21.00	1.00	21.00
##FFFFFF	11.20	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00408C

Deuteranopia (green-blind)

#003687

Tritanopia (blue-blind)

#004858

Achromatopsia (no color)

#3B3B3B

Design tokens & code

CSS

--color: #1f3289;
/* rgb */ color: rgb(31, 50, 137);
/* oklch */ color: oklch(36.2% 0.146 268.4);

Tailwind

colors: {
  custom: {
    50: '#6c69ac',
    500: '#1f3289',
    950: '#000000',
  },
}

SCSS

$custom: #1f3289;
$custom-light: #6c69ac;
$custom-dark: #000000;

JSON

{
  "hex": "#1f3289",
  "rgb": {
    "r": 31,
    "g": 50,
    "b": 137
  },
  "hsl": {
    "h": 229.245,
    "s": 63.095,
    "l": 32.941
  },
  "oklch": {
    "l": 0.36223,
    "c": 0.14637,
    "h": 268.4
  },
  "luminance": 0.04379
}

Semantic roles & 50–950 ramp

primary

#1F3289

secondary

#B9A54B

accent

#C942E6

background

#F7F6FA

surface

#EDEBF4

border

#C8C6CE

text

#080610

muted

#7B7A7F

Preview Lab

Preview with #1F3289

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

Preview Lab → · Contrast checker → · Palette generator →