#1F2172#1F2172

#1F2172 is a dark, vivid blue. Relative luminance 0.026; OKLCH L 30.8% C 0.135 H 274.0°. Best body text is #FFFFFF at 13.83:1 contrast (WCAG AA passes).

Color values

HEX	#1F2172
RGB	rgb(31, 33, 114)
HSL	hsl(239, 57%, 28%)
HSV	hsv(239, 73%, 45%)
CMYK	cmyk(72.8%, 71.1%, 0%, 55.3%)
CIE-LAB	lab(18.34, 28.00, -46.77)
CIE-LCH	lch(18.34, 54.51, 300.90°)
OKLab	oklab(30.76% 0.0094 -0.1351)
OKLCH	oklch(30.76% 0.135 274)
XYZ	xyz(4.1452, 2.5935, 16.1985)
Luminance	0.0259 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F2172 #72701F

analogous

#1F4A72 #1F2172 #461F72

triadic

#1F2172 #721F21 #21721F

tetradic

#1F2172 #721F4A #72701F #1F7246

square

#1F2172 #721F4A #72701F #1F7246

split-complementary

#1F2172 #72461F #4A721F

monochromatic

#070718 #121342 #1F2172 #2C2FA2 #4044CB

Accessibility & contrast

On white

13.83

#1F2172 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.52

#1F2172 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F2172

13.83:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F2172	#FFFFFF	#000000	##FFFFFF
##1F2172	1.00	13.83	1.52	13.83
#FFFFFF	13.83	1.00	21.00	1.00
#000000	1.52	21.00	1.00	21.00
##FFFFFF	13.83	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003174

Deuteranopia (green-blind)

#002970

Tritanopia (blue-blind)

#003746

Achromatopsia (no color)

#2D2D2D

Design tokens & code

CSS

--color: #1f2172;
/* rgb */ color: rgb(31, 33, 114);
/* oklch */ color: oklch(30.8% 0.135 274.0);

Tailwind

colors: {
  custom: {
    50: '#685c9b',
    500: '#1f2172',
    950: '#000000',
  },
}

SCSS

$custom: #1f2172;
$custom-light: #685c9b;
$custom-dark: #000000;

JSON

{
  "hex": "#1f2172",
  "rgb": {
    "r": 31,
    "g": 33,
    "b": 114
  },
  "hsl": {
    "h": 238.554,
    "s": 57.241,
    "l": 28.431
  },
  "oklch": {
    "l": 0.3076,
    "c": 0.13548,
    "h": 274
  },
  "luminance": 0.02594
}

Semantic roles & 50–950 ramp

primary

#1F2172

secondary

#A6A447

accent

#DD47E0

background

#F6F5F9

surface

#EBE9F2

border

#C6C5CC

text

#07040E

muted

#7A797E

Preview Lab

Preview with #1F2172

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

Preview Lab → · Contrast checker → · Palette generator →