#1F228E#1F228E

#1F228E is a dark, vivid blue. Relative luminance 0.034; OKLCH L 33.9% C 0.172 H 271.5°. Best body text is #FFFFFF at 12.52:1 contrast (WCAG AA passes).

Color values

HEX	#1F228E
RGB	rgb(31, 34, 142)
HSL	hsl(238, 64%, 34%)
HSV	hsv(238, 78%, 56%)
CMYK	cmyk(78.2%, 76.1%, 0%, 44.3%)
CIE-LAB	lab(21.53, 37.50, -59.24)
CIE-LCH	lch(21.53, 70.11, 302.33°)
OKLab	oklab(33.94% 0.0044 -0.1715)
OKLCH	oklch(33.94% 0.172 271.5)
XYZ	xyz(6.0179, 3.3877, 25.9227)
Luminance	0.0339 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F228E #8E8B1F

analogous

#1F5A8E #1F228E #541F8E

triadic

#1F228E #8E1F22 #228E1F

tetradic

#1F228E #8E1F5A #8E8B1F #1F8E54

square

#1F228E #8E1F5A #8E8B1F #1F8E54

split-complementary

#1F228E #8E541F #5A8E1F

monochromatic

#090A2A #14165C #1F228E #2A2EC0 #4F53D9

Accessibility & contrast

On white

12.52

#1F228E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.68

#1F228E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F228E

12.52:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F228E	#FFFFFF	#000000	##FFFFFF
##1F228E	1.00	12.52	1.68	12.52
#FFFFFF	12.52	1.00	21.00	1.00
#000000	1.68	21.00	1.00	21.00
##FFFFFF	12.52	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003991

Deuteranopia (green-blind)

#002E8C

Tritanopia (blue-blind)

#004256

Achromatopsia (no color)

#343434

Design tokens & code

CSS

--color: #1f228e;
/* rgb */ color: rgb(31, 34, 142);
/* oklch */ color: oklch(33.9% 0.172 271.5);

Tailwind

colors: {
  custom: {
    50: '#6f5eb0',
    500: '#1f228e',
    950: '#000000',
  },
}

SCSS

$custom: #1f228e;
$custom-light: #6f5eb0;
$custom-dark: #000000;

JSON

{
  "hex": "#1f228e",
  "rgb": {
    "r": 31,
    "g": 34,
    "b": 142
  },
  "hsl": {
    "h": 238.378,
    "s": 64.162,
    "l": 33.922
  },
  "oklch": {
    "l": 0.33943,
    "c": 0.17157,
    "h": 271.5
  },
  "luminance": 0.03388
}

Semantic roles & 50–950 ramp

primary

#1F228E

secondary

#BBB84D

accent

#E341E7

background

#F7F5FB

surface

#EDE9F6

border

#C8C5D0

text

#090411

muted

#7B7980

Preview Lab

Preview with #1F228E

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

Preview Lab → · Contrast checker → · Palette generator →