#1F2573#1F2573

#1F2573 is a dark, vivid blue. Relative luminance 0.029; OKLCH L 31.6% C 0.132 H 272.7°. Best body text is #FFFFFF at 13.37:1 contrast (WCAG AA passes).

Color values

HEX	#1F2573
RGB	rgb(31, 37, 115)
HSL	hsl(236, 58%, 29%)
HSV	hsv(236, 73%, 45%)
CMYK	cmyk(73%, 67.8%, 0%, 54.9%)
CIE-LAB	lab(19.44, 25.68, -45.61)
CIE-LCH	lch(19.44, 52.34, 299.38°)
OKLab	oklab(31.59% 0.0063 -0.1317)
OKLCH	oklch(31.59% 0.132 272.7)
XYZ	xyz(4.3201, 2.8518, 16.5391)
Luminance	0.0285 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F2573 #736D1F

analogous

#1F4F73 #1F2573 #431F73

triadic

#1F2573 #731F25 #25731F

tetradic

#1F2573 #731F4F #736D1F #1F7343

square

#1F2573 #731F4F #736D1F #1F7343

split-complementary

#1F2573 #73431F #4F731F

monochromatic

#060818 #121543 #1F2573 #2C35A3 #414BCC

Accessibility & contrast

On white

13.37

#1F2573 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.57

#1F2573 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F2573

13.37:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F2573	#FFFFFF	#000000	##FFFFFF
##1F2573	1.00	13.37	1.57	13.37
#FFFFFF	13.37	1.00	21.00	1.00
#000000	1.57	21.00	1.00	21.00
##FFFFFF	13.37	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003375

Deuteranopia (green-blind)

#002B72

Tritanopia (blue-blind)

#003948

Achromatopsia (no color)

#2F2F2F

Design tokens & code

CSS

--color: #1f2573;
/* rgb */ color: rgb(31, 37, 115);
/* oklch */ color: oklch(31.6% 0.132 272.7);

Tailwind

colors: {
  custom: {
    50: '#685f9c',
    500: '#1f2573',
    950: '#000000',
  },
}

SCSS

$custom: #1f2573;
$custom-light: #685f9c;
$custom-dark: #000000;

JSON

{
  "hex": "#1f2573",
  "rgb": {
    "r": 31,
    "g": 37,
    "b": 115
  },
  "hsl": {
    "h": 235.714,
    "s": 57.534,
    "l": 28.627
  },
  "oklch": {
    "l": 0.31593,
    "c": 0.13188,
    "h": 272.7
  },
  "luminance": 0.02852
}

Semantic roles & 50–950 ramp

primary

#1F2573

secondary

#A7A047

accent

#D647E1

background

#F6F5F9

surface

#EBE9F2

border

#C6C5CC

text

#07040E

muted

#7A797E

Preview Lab

Preview with #1F2573

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

Preview Lab → · Contrast checker → · Palette generator →