#1F227A#1F227A

#1F227A is a dark, vivid blue. Relative luminance 0.028; OKLCH L 31.8% C 0.145 H 273.0°. Best body text is #FFFFFF at 13.39:1 contrast (WCAG AA passes).

Color values

HEX	#1F227A
RGB	rgb(31, 34, 122)
HSL	hsl(238, 59%, 30%)
HSV	hsv(238, 75%, 48%)
CMYK	cmyk(74.6%, 72.1%, 0%, 52.2%)
CIE-LAB	lab(19.39, 30.30, -50.17)
CIE-LCH	lch(19.39, 58.62, 301.13°)
OKLab	oklab(31.77% 0.0076 -0.1451)
OKLCH	oklch(31.77% 0.145 273)
XYZ	xyz(4.6488, 2.8400, 18.7118)
Luminance	0.0284 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F227A #7A771F

analogous

#1F4F7A #1F227A #4A1F7A

triadic

#1F227A #7A1F22 #227A1F

tetradic

#1F227A #7A1F4F #7A771F #1F7A4A

square

#1F227A #7A1F4F #7A771F #1F7A4A

split-complementary

#1F227A #7A4A1F #4F7A1F

monochromatic

#060718 #131449 #1F227A #2B30AB #4449CF

Accessibility & contrast

On white

13.39

#1F227A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.57

#1F227A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F227A

13.39:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F227A	#FFFFFF	#000000	##FFFFFF
##1F227A	1.00	13.39	1.57	13.39
#FFFFFF	13.39	1.00	21.00	1.00
#000000	1.57	21.00	1.00	21.00
##FFFFFF	13.39	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00337D

Deuteranopia (green-blind)

#002B78

Tritanopia (blue-blind)

#003A4B

Achromatopsia (no color)

#2F2F2F

Design tokens & code

CSS

--color: #1f227a;
/* rgb */ color: rgb(31, 34, 122);
/* oklch */ color: oklch(31.8% 0.145 273.0);

Tailwind

colors: {
  custom: {
    50: '#6a5da1',
    500: '#1f227a',
    950: '#000000',
  },
}

SCSS

$custom: #1f227a;
$custom-light: #6a5da1;
$custom-dark: #000000;

JSON

{
  "hex": "#1f227a",
  "rgb": {
    "r": 31,
    "g": 34,
    "b": 122
  },
  "hsl": {
    "h": 238.022,
    "s": 59.477,
    "l": 30
  },
  "oklch": {
    "l": 0.31769,
    "c": 0.14529,
    "h": 273
  },
  "luminance": 0.02841
}

Semantic roles & 50–950 ramp

primary

#1F227A

secondary

#ADAA47

accent

#DD45E3

background

#F6F5FA

surface

#ECE9F3

border

#C7C5CD

text

#07040F

muted

#7A797F

Preview Lab

Preview with #1F227A

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

Preview Lab → · Contrast checker → · Palette generator →