#1F2271#1F2271

#1F2271 is a dark, vivid blue. Relative luminance 0.026; OKLCH L 30.8% C 0.133 H 273.8°. Best body text is #FFFFFF at 13.77:1 contrast (WCAG AA passes).

Color values

HEX	#1F2271
RGB	rgb(31, 34, 113)
HSL	hsl(238, 57%, 28%)
HSV	hsv(238, 73%, 44%)
CMYK	cmyk(72.6%, 69.9%, 0%, 55.7%)
CIE-LAB	lab(18.48, 26.95, -45.89)
CIE-LCH	lch(18.48, 53.22, 300.43°)
OKLab	oklab(30.84% 0.0088 -0.1325)
OKLCH	oklch(30.84% 0.133 273.8)
XYZ	xyz(4.1167, 2.6272, 15.9097)
Luminance	0.0263 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F2271 #716E1F

analogous

#1F4B71 #1F2271 #451F71

triadic

#1F2271 #711F22 #22711F

tetradic

#1F2271 #711F4B #716E1F #1F7145

square

#1F2271 #711F4B #716E1F #1F7145

split-complementary

#1F2271 #71451F #4B711F

monochromatic

#070718 #121441 #1F2271 #2C30A1 #4045CB

Accessibility & contrast

On white

13.77

#1F2271 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.53

#1F2271 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F2271

13.77:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F2271	#FFFFFF	#000000	##FFFFFF
##1F2271	1.00	13.77	1.53	13.77
#FFFFFF	13.77	1.00	21.00	1.00
#000000	1.53	21.00	1.00	21.00
##FFFFFF	13.77	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003173

Deuteranopia (green-blind)

#002970

Tritanopia (blue-blind)

#003746

Achromatopsia (no color)

#2D2D2D

Design tokens & code

CSS

--color: #1f2271;
/* rgb */ color: rgb(31, 34, 113);
/* oklch */ color: oklch(30.8% 0.133 273.8);

Tailwind

colors: {
  custom: {
    50: '#675d9b',
    500: '#1f2271',
    950: '#000000',
  },
}

SCSS

$custom: #1f2271;
$custom-light: #675d9b;
$custom-dark: #000000;

JSON

{
  "hex": "#1f2271",
  "rgb": {
    "r": 31,
    "g": 34,
    "b": 113
  },
  "hsl": {
    "h": 237.805,
    "s": 56.944,
    "l": 28.235
  },
  "oklch": {
    "l": 0.30837,
    "c": 0.13284,
    "h": 273.8
  },
  "luminance": 0.02628
}

Semantic roles & 50–950 ramp

primary

#1F2271

secondary

#A5A147

accent

#DB48E0

background

#F6F5F9

surface

#EBE9F2

border

#C6C5CC

text

#07040E

muted

#7A797E

Preview Lab

Preview with #1F2271

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

Preview Lab → · Contrast checker → · Palette generator →