#1F2873#1F2873

#1F2873 is a dark, vivid blue. Relative luminance 0.030; OKLCH L 32.2% C 0.128 H 271.8°. Best body text is #FFFFFF at 13.05:1 contrast (WCAG AA passes).

Color values

HEX	#1F2873
RGB	rgb(31, 40, 115)
HSL	hsl(234, 58%, 29%)
HSV	hsv(234, 73%, 45%)
CMYK	cmyk(73%, 65.2%, 0%, 54.9%)
CIE-LAB	lab(20.23, 23.61, -44.32)
CIE-LCH	lch(20.23, 50.22, 298.05°)
OKLab	oklab(32.17% 0.004 -0.1279)
OKLCH	oklch(32.17% 0.128 271.8)
XYZ	xyz(4.4173, 3.0463, 16.5715)
Luminance	0.0305 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F2873 #736A1F

analogous

#1F5273 #1F2873 #401F73

triadic

#1F2873 #731F28 #28731F

tetradic

#1F2873 #731F52 #736A1F #1F7340

square

#1F2873 #731F52 #736A1F #1F7340

split-complementary

#1F2873 #73401F #52731F

monochromatic

#060818 #121743 #1F2873 #2C39A3 #4150CC

Accessibility & contrast

On white

13.05

#1F2873 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.61

#1F2873 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F2873

13.05:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F2873	#FFFFFF	#000000	##FFFFFF
##1F2873	1.00	13.05	1.61	13.05
#FFFFFF	13.05	1.00	21.00	1.00
#000000	1.61	21.00	1.00	21.00
##FFFFFF	13.05	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003575

Deuteranopia (green-blind)

#002D72

Tritanopia (blue-blind)

#003B49

Achromatopsia (no color)

#313131

Design tokens & code

CSS

--color: #1f2873;
/* rgb */ color: rgb(31, 40, 115);
/* oklch */ color: oklch(32.2% 0.128 271.8);

Tailwind

colors: {
  custom: {
    50: '#67629c',
    500: '#1f2873',
    950: '#000000',
  },
}

SCSS

$custom: #1f2873;
$custom-light: #67629c;
$custom-dark: #000000;

JSON

{
  "hex": "#1f2873",
  "rgb": {
    "r": 31,
    "g": 40,
    "b": 115
  },
  "hsl": {
    "h": 233.571,
    "s": 57.534,
    "l": 28.627
  },
  "oklch": {
    "l": 0.32171,
    "c": 0.12799,
    "h": 271.8
  },
  "luminance": 0.03047
}

Semantic roles & 50–950 ramp

primary

#1F2873

secondary

#A79D47

accent

#D047E1

background

#F6F5F9

surface

#EBEAF2

border

#C6C6CC

text

#07050E

muted

#7A797E

Preview Lab

Preview with #1F2873

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

Preview Lab → · Contrast checker → · Palette generator →