#1F2973#1F2973

#1F2973 is a dark, vivid blue. Relative luminance 0.031; OKLCH L 32.4% C 0.127 H 271.4°. Best body text is #FFFFFF at 12.94:1 contrast (WCAG AA passes).

Color values

HEX	#1F2973
RGB	rgb(31, 41, 115)
HSL	hsl(233, 58%, 29%)
HSV	hsv(233, 73%, 45%)
CMYK	cmyk(73%, 64.3%, 0%, 54.9%)
CIE-LAB	lab(20.50, 22.91, -43.88)
CIE-LCH	lch(20.50, 49.50, 297.57°)
OKLab	oklab(32.37% 0.0032 -0.1266)
OKLCH	oklch(32.37% 0.127 271.4)
XYZ	xyz(4.4515, 3.1146, 16.5829)
Luminance	0.0312 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F2973 #73691F

analogous

#1F5373 #1F2973 #3F1F73

triadic

#1F2973 #731F29 #29731F

tetradic

#1F2973 #731F53 #73691F #1F733F

square

#1F2973 #731F53 #73691F #1F733F

split-complementary

#1F2973 #733F1F #53731F

monochromatic

#060918 #121843 #1F2973 #2C3AA3 #4151CC

Accessibility & contrast

On white

12.94

#1F2973 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.62

#1F2973 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F2973

12.94:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F2973	#FFFFFF	#000000	##FFFFFF
##1F2973	1.00	12.94	1.62	12.94
#FFFFFF	12.94	1.00	21.00	1.00
#000000	1.62	21.00	1.00	21.00
##FFFFFF	12.94	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003575

Deuteranopia (green-blind)

#002E72

Tritanopia (blue-blind)

#003C49

Achromatopsia (no color)

#313131

Design tokens & code

CSS

--color: #1f2973;
/* rgb */ color: rgb(31, 41, 115);
/* oklch */ color: oklch(32.4% 0.127 271.4);

Tailwind

colors: {
  custom: {
    50: '#67629c',
    500: '#1f2973',
    950: '#000000',
  },
}

SCSS

$custom: #1f2973;
$custom-light: #67629c;
$custom-dark: #000000;

JSON

{
  "hex": "#1f2973",
  "rgb": {
    "r": 31,
    "g": 41,
    "b": 115
  },
  "hsl": {
    "h": 232.857,
    "s": 57.534,
    "l": 28.627
  },
  "oklch": {
    "l": 0.32369,
    "c": 0.12667,
    "h": 271.4
  },
  "luminance": 0.03115
}

Semantic roles & 50–950 ramp

primary

#1F2973

secondary

#A79B47

accent

#CE47E1

background

#F6F5F9

surface

#EBEAF2

border

#C6C6CC

text

#07050E

muted

#7A797E

Preview Lab

Preview with #1F2973

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

Preview Lab → · Contrast checker → · Palette generator →