#1F228F#1F228F

#1F228F is a dark, vivid blue. Relative luminance 0.034; OKLCH L 34.1% C 0.173 H 271.4°. Best body text is #FFFFFF at 12.47:1 contrast (WCAG AA passes).

Color values

HEX	#1F228F
RGB	rgb(31, 34, 143)
HSL	hsl(238, 64%, 34%)
HSV	hsv(238, 78%, 56%)
CMYK	cmyk(78.3%, 76.2%, 0%, 43.9%)
CIE-LAB	lab(21.65, 37.85, -59.68)
CIE-LCH	lch(21.65, 70.67, 302.38°)
OKLab	oklab(34.06% 0.0043 -0.1728)
OKLCH	oklch(34.06% 0.173 271.4)
XYZ	xyz(6.0933, 3.4179, 26.3199)
Luminance	0.0342 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F228F #8F8C1F

analogous

#1F5A8F #1F228F #541F8F

triadic

#1F228F #8F1F22 #228F1F

tetradic

#1F228F #8F1F5A #8F8C1F #1F8F54

square

#1F228F #8F1F5A #8F8C1F #1F8F54

split-complementary

#1F228F #8F541F #5A8F1F

monochromatic

#090A2A #14165D #1F228F #2A2EC1 #4F53D9

Accessibility & contrast

On white

12.47

#1F228F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.68

#1F228F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F228F

12.47:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F228F	#FFFFFF	#000000	##FFFFFF
##1F228F	1.00	12.47	1.68	12.47
#FFFFFF	12.47	1.00	21.00	1.00
#000000	1.68	21.00	1.00	21.00
##FFFFFF	12.47	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003992

Deuteranopia (green-blind)

#002E8D

Tritanopia (blue-blind)

#004257

Achromatopsia (no color)

#343434

Design tokens & code

CSS

--color: #1f228f;
/* rgb */ color: rgb(31, 34, 143);
/* oklch */ color: oklch(34.1% 0.173 271.4);

Tailwind

colors: {
  custom: {
    50: '#6f5eb1',
    500: '#1f228f',
    950: '#000000',
  },
}

SCSS

$custom: #1f228f;
$custom-light: #6f5eb1;
$custom-dark: #000000;

JSON

{
  "hex": "#1f228f",
  "rgb": {
    "r": 31,
    "g": 34,
    "b": 143
  },
  "hsl": {
    "h": 238.393,
    "s": 64.368,
    "l": 34.118
  },
  "oklch": {
    "l": 0.34055,
    "c": 0.17284,
    "h": 271.4
  },
  "luminance": 0.03419
}

Semantic roles & 50–950 ramp

primary

#1F228F

secondary

#BCB94E

accent

#E340E7

background

#F7F5FB

surface

#EDE9F6

border

#C8C5D0

text

#090411

muted

#7B7980

Preview Lab

Preview with #1F228F

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

Preview Lab → · Contrast checker → · Palette generator →