#1F228D#1F228D

#1F228D is a dark, vivid blue. Relative luminance 0.034; OKLCH L 33.8% C 0.170 H 271.6°. Best body text is #FFFFFF at 12.56:1 contrast (WCAG AA passes).

Color values

HEX	#1F228D
RGB	rgb(31, 34, 141)
HSL	hsl(238, 64%, 34%)
HSV	hsv(238, 78%, 55%)
CMYK	cmyk(78%, 75.9%, 0%, 44.7%)
CIE-LAB	lab(21.42, 37.15, -58.80)
CIE-LCH	lch(21.42, 69.55, 302.28°)
OKLab	oklab(33.83% 0.0046 -0.1702)
OKLCH	oklch(33.83% 0.17 271.6)
XYZ	xyz(5.9432, 3.3578, 25.5290)
Luminance	0.0336 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F228D #8D8A1F

analogous

#1F598D #1F228D #531F8D

triadic

#1F228D #8D1F22 #228D1F

tetradic

#1F228D #8D1F59 #8D8A1F #1F8D53

square

#1F228D #8D1F59 #8D8A1F #1F8D53

split-complementary

#1F228D #8D531F #598D1F

monochromatic

#090A29 #14165B #1F228D #2A2EBF #4E52D8

Accessibility & contrast

On white

12.56

#1F228D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.67

#1F228D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F228D

12.56:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F228D	#FFFFFF	#000000	##FFFFFF
##1F228D	1.00	12.56	1.67	12.56
#FFFFFF	12.56	1.00	21.00	1.00
#000000	1.67	21.00	1.00	21.00
##FFFFFF	12.56	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003990

Deuteranopia (green-blind)

#002E8B

Tritanopia (blue-blind)

#004156

Achromatopsia (no color)

#333333

Design tokens & code

CSS

--color: #1f228d;
/* rgb */ color: rgb(31, 34, 141);
/* oklch */ color: oklch(33.8% 0.170 271.6);

Tailwind

colors: {
  custom: {
    50: '#6f5eaf',
    500: '#1f228d',
    950: '#000000',
  },
}

SCSS

$custom: #1f228d;
$custom-light: #6f5eaf;
$custom-dark: #000000;

JSON

{
  "hex": "#1f228d",
  "rgb": {
    "r": 31,
    "g": 34,
    "b": 141
  },
  "hsl": {
    "h": 238.364,
    "s": 63.953,
    "l": 33.725
  },
  "oklch": {
    "l": 0.33831,
    "c": 0.1703,
    "h": 271.6
  },
  "luminance": 0.03358
}

Semantic roles & 50–950 ramp

primary

#1F228D

secondary

#BBB84D

accent

#E241E7

background

#F7F5FA

surface

#EDE9F5

border

#C8C5CF

text

#090411

muted

#7B7980

Preview Lab

Preview with #1F228D

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

Preview Lab → · Contrast checker → · Palette generator →