#1F2872#1F2872

#1F2872 is a dark, vivid blue. Relative luminance 0.030; OKLCH L 32.1% C 0.127 H 271.8°. Best body text is #FFFFFF at 13.09:1 contrast (WCAG AA passes).

Color values

HEX	#1F2872
RGB	rgb(31, 40, 114)
HSL	hsl(233, 57%, 28%)
HSV	hsv(233, 73%, 45%)
CMYK	cmyk(72.8%, 64.9%, 0%, 55.3%)
CIE-LAB	lab(20.14, 23.22, -43.82)
CIE-LCH	lch(20.14, 49.60, 297.92°)
OKLab	oklab(32.07% 0.004 -0.1265)
OKLCH	oklch(32.07% 0.127 271.8)
XYZ	xyz(4.3601, 3.0234, 16.2701)
Luminance	0.0302 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F2872 #72691F

analogous

#1F5172 #1F2872 #3F1F72

triadic

#1F2872 #721F28 #28721F

tetradic

#1F2872 #721F51 #72691F #1F723F

square

#1F2872 #721F51 #72691F #1F723F

split-complementary

#1F2872 #723F1F #51721F

monochromatic

#070818 #121742 #1F2872 #2C39A2 #404FCB

Accessibility & contrast

On white

13.09

#1F2872 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.60

#1F2872 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F2872

13.09:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F2872	#FFFFFF	#000000	##FFFFFF
##1F2872	1.00	13.09	1.60	13.09
#FFFFFF	13.09	1.00	21.00	1.00
#000000	1.60	21.00	1.00	21.00
##FFFFFF	13.09	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003474

Deuteranopia (green-blind)

#002D71

Tritanopia (blue-blind)

#003B49

Achromatopsia (no color)

#313131

Design tokens & code

CSS

--color: #1f2872;
/* rgb */ color: rgb(31, 40, 114);
/* oklch */ color: oklch(32.1% 0.127 271.8);

Tailwind

colors: {
  custom: {
    50: '#67619b',
    500: '#1f2872',
    950: '#000000',
  },
}

SCSS

$custom: #1f2872;
$custom-light: #67619b;
$custom-dark: #000000;

JSON

{
  "hex": "#1f2872",
  "rgb": {
    "r": 31,
    "g": 40,
    "b": 114
  },
  "hsl": {
    "h": 233.494,
    "s": 57.241,
    "l": 28.431
  },
  "oklch": {
    "l": 0.32075,
    "c": 0.12653,
    "h": 271.8
  },
  "luminance": 0.03024
}

Semantic roles & 50–950 ramp

primary

#1F2872

secondary

#A69C47

accent

#D047E0

background

#F6F5F9

surface

#EBEAF2

border

#C6C6CC

text

#07050E

muted

#7A797E

Preview Lab

Preview with #1F2872

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

Preview Lab → · Contrast checker → · Palette generator →