#1F2972#1F2972

#1F2972 is a dark, vivid blue. Relative luminance 0.031; OKLCH L 32.3% C 0.125 H 271.5°. Best body text is #FFFFFF at 12.98:1 contrast (WCAG AA passes).

Color values

HEX	#1F2972
RGB	rgb(31, 41, 114)
HSL	hsl(233, 57%, 28%)
HSV	hsv(233, 73%, 45%)
CMYK	cmyk(72.8%, 64%, 0%, 55.3%)
CIE-LAB	lab(20.41, 22.52, -43.38)
CIE-LCH	lch(20.41, 48.88, 297.44°)
OKLab	oklab(32.28% 0.0032 -0.1252)
OKLCH	oklch(32.28% 0.125 271.5)
XYZ	xyz(4.3942, 3.0917, 16.2815)
Luminance	0.0309 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F2972 #72681F

analogous

#1F5272 #1F2972 #3E1F72

triadic

#1F2972 #721F29 #29721F

tetradic

#1F2972 #721F52 #72681F #1F723E

square

#1F2972 #721F52 #72681F #1F723E

split-complementary

#1F2972 #723E1F #52721F

monochromatic

#070918 #121842 #1F2972 #2C3AA2 #4051CB

Accessibility & contrast

On white

12.98

#1F2972 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.62

#1F2972 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F2972

12.98:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F2972	#FFFFFF	#000000	##FFFFFF
##1F2972	1.00	12.98	1.62	12.98
#FFFFFF	12.98	1.00	21.00	1.00
#000000	1.62	21.00	1.00	21.00
##FFFFFF	12.98	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003574

Deuteranopia (green-blind)

#002D71

Tritanopia (blue-blind)

#003B49

Achromatopsia (no color)

#313131

Design tokens & code

CSS

--color: #1f2972;
/* rgb */ color: rgb(31, 41, 114);
/* oklch */ color: oklch(32.3% 0.125 271.5);

Tailwind

colors: {
  custom: {
    50: '#67629b',
    500: '#1f2972',
    950: '#000000',
  },
}

SCSS

$custom: #1f2972;
$custom-light: #67629b;
$custom-dark: #000000;

JSON

{
  "hex": "#1f2972",
  "rgb": {
    "r": 31,
    "g": 41,
    "b": 114
  },
  "hsl": {
    "h": 232.771,
    "s": 57.241,
    "l": 28.431
  },
  "oklch": {
    "l": 0.32275,
    "c": 0.12521,
    "h": 271.5
  },
  "luminance": 0.03092
}

Semantic roles & 50–950 ramp

primary

#1F2972

secondary

#A69A47

accent

#CE47E0

background

#F6F5F9

surface

#EBEAF2

border

#C6C6CC

text

#07050E

muted

#7A797E

Preview Lab

Preview with #1F2972

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

Preview Lab → · Contrast checker → · Palette generator →