#1F228A#1F228A

#1F228A is a dark, vivid blue. Relative luminance 0.033; OKLCH L 33.5% C 0.166 H 271.8°. Best body text is #FFFFFF at 12.70:1 contrast (WCAG AA passes).

Color values

HEX	#1F228A
RGB	rgb(31, 34, 138)
HSL	hsl(238, 63%, 33%)
HSV	hsv(238, 78%, 54%)
CMYK	cmyk(77.5%, 75.4%, 0%, 45.9%)
CIE-LAB	lab(21.09, 36.09, -57.48)
CIE-LCH	lch(21.09, 67.87, 302.13°)
OKLab	oklab(33.5% 0.0051 -0.1664)
OKLCH	oklch(33.5% 0.166 271.8)
XYZ	xyz(5.7230, 3.2697, 24.3693)
Luminance	0.0327 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F228A #8A871F

analogous

#1F578A #1F228A #511F8A

triadic

#1F228A #8A1F22 #228A1F

tetradic

#1F228A #8A1F57 #8A871F #1F8A51

square

#1F228A #8A1F57 #8A871F #1F8A51

split-complementary

#1F228A #8A511F #578A1F

monochromatic

#090926 #141658 #1F228A #2A2EBC #4C50D7

Accessibility & contrast

On white

12.70

#1F228A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.65

#1F228A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F228A

12.70:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F228A	#FFFFFF	#000000	##FFFFFF
##1F228A	1.00	12.70	1.65	12.70
#FFFFFF	12.70	1.00	21.00	1.00
#000000	1.65	21.00	1.00	21.00
##FFFFFF	12.70	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00388D

Deuteranopia (green-blind)

#002D88

Tritanopia (blue-blind)

#004054

Achromatopsia (no color)

#333333

Design tokens & code

CSS

--color: #1f228a;
/* rgb */ color: rgb(31, 34, 138);
/* oklch */ color: oklch(33.5% 0.166 271.8);

Tailwind

colors: {
  custom: {
    50: '#6e5ead',
    500: '#1f228a',
    950: '#000000',
  },
}

SCSS

$custom: #1f228a;
$custom-light: #6e5ead;
$custom-dark: #000000;

JSON

{
  "hex": "#1f228a",
  "rgb": {
    "r": 31,
    "g": 34,
    "b": 138
  },
  "hsl": {
    "h": 238.318,
    "s": 63.314,
    "l": 33.137
  },
  "oklch": {
    "l": 0.33499,
    "c": 0.16645,
    "h": 271.8
  },
  "luminance": 0.0327
}

Semantic roles & 50–950 ramp

primary

#1F228A

secondary

#BAB74B

accent

#E241E6

background

#F7F5FA

surface

#EDE9F4

border

#C8C5CE

text

#080410

muted

#7B797F

Preview Lab

Preview with #1F228A

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

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