#1F2471#1F2471

#1F2471 is a dark, vivid blue. Relative luminance 0.027; OKLCH L 31.2% C 0.130 H 273.2°. Best body text is #FFFFFF at 13.56:1 contrast (WCAG AA passes).

Color values

HEX	#1F2471
RGB	rgb(31, 36, 113)
HSL	hsl(236, 57%, 28%)
HSV	hsv(236, 73%, 44%)
CMYK	cmyk(72.6%, 68.1%, 0%, 55.7%)
CIE-LAB	lab(18.99, 25.60, -45.05)
CIE-LCH	lch(18.99, 51.82, 299.61°)
OKLab	oklab(31.21% 0.0073 -0.1301)
OKLCH	oklch(31.21% 0.13 273.2)
XYZ	xyz(4.1756, 2.7449, 15.9293)
Luminance	0.0274 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F2471 #716C1F

analogous

#1F4D71 #1F2471 #431F71

triadic

#1F2471 #711F24 #24711F

tetradic

#1F2471 #711F4D #716C1F #1F7143

square

#1F2471 #711F4D #716C1F #1F7143

split-complementary

#1F2471 #71431F #4D711F

monochromatic

#070818 #121541 #1F2471 #2C33A1 #4048CB

Accessibility & contrast

On white

13.56

#1F2471 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.55

#1F2471 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F2471

13.56:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F2471	#FFFFFF	#000000	##FFFFFF
##1F2471	1.00	13.56	1.55	13.56
#FFFFFF	13.56	1.00	21.00	1.00
#000000	1.55	21.00	1.00	21.00
##FFFFFF	13.56	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003273

Deuteranopia (green-blind)

#002A70

Tritanopia (blue-blind)

#003847

Achromatopsia (no color)

#2E2E2E

Design tokens & code

CSS

--color: #1f2471;
/* rgb */ color: rgb(31, 36, 113);
/* oklch */ color: oklch(31.2% 0.130 273.2);

Tailwind

colors: {
  custom: {
    50: '#675f9b',
    500: '#1f2471',
    950: '#000000',
  },
}

SCSS

$custom: #1f2471;
$custom-light: #675f9b;
$custom-dark: #000000;

JSON

{
  "hex": "#1f2471",
  "rgb": {
    "r": 31,
    "g": 36,
    "b": 113
  },
  "hsl": {
    "h": 236.341,
    "s": 56.944,
    "l": 28.235
  },
  "oklch": {
    "l": 0.31206,
    "c": 0.13031,
    "h": 273.2
  },
  "luminance": 0.02745
}

Semantic roles & 50–950 ramp

primary

#1F2471

secondary

#A59F47

accent

#D748E0

background

#F6F5F9

surface

#EBE9F2

border

#C6C5CC

text

#07040E

muted

#7A797E

Preview Lab

Preview with #1F2471

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

Preview Lab → · Contrast checker → · Palette generator →