#1F229C#1F229C

#1F229C is a dark, vivid blue. Relative luminance 0.038; OKLCH L 35.5% C 0.189 H 270.6°. Best body text is #FFFFFF at 11.88:1 contrast (WCAG AA passes).

Color values

HEX	#1F229C
RGB	rgb(31, 34, 156)
HSL	hsl(239, 67%, 37%)
HSV	hsv(239, 80%, 61%)
CMYK	cmyk(80.1%, 78.2%, 0%, 38.8%)
CIE-LAB	lab(23.12, 42.32, -65.26)
CIE-LCH	lch(23.12, 77.78, 302.96°)
OKLab	oklab(35.53% 0.0019 -0.189)
OKLCH	oklch(35.53% 0.189 270.6)
XYZ	xyz(7.1358, 3.8349, 31.8102)
Luminance	0.0384 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F229C #9C991F

analogous

#1F619C #1F229C #5B1F9C

triadic

#1F229C #9C1F22 #229C1F

tetradic

#1F229C #9C1F61 #9C991F #1F9C5B

square

#1F229C #9C1F61 #9C991F #1F9C5B

split-complementary

#1F229C #9C5B1F #619C1F

monochromatic

#0B0C36 #151769 #1F229C #292DCF #585BDE

Accessibility & contrast

On white

11.88

#1F229C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.77

#1F229C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F229C

11.88:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F229C	#FFFFFF	#000000	##FFFFFF
##1F229C	1.00	11.88	1.77	11.88
#FFFFFF	11.88	1.00	21.00	1.00
#000000	1.77	21.00	1.00	21.00
##FFFFFF	11.88	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003D9F

Deuteranopia (green-blind)

#00319A

Tritanopia (blue-blind)

#00475E

Achromatopsia (no color)

#373737

Design tokens & code

CSS

--color: #1f229c;
/* rgb */ color: rgb(31, 34, 156);
/* oklch */ color: oklch(35.5% 0.189 270.6);

Tailwind

colors: {
  custom: {
    50: '#735fbb',
    500: '#1f229c',
    950: '#000000',
  },
}

SCSS

$custom: #1f229c;
$custom-light: #735fbb;
$custom-dark: #000000;

JSON

{
  "hex": "#1f229c",
  "rgb": {
    "r": 31,
    "g": 34,
    "b": 156
  },
  "hsl": {
    "h": 238.56,
    "s": 66.845,
    "l": 36.667
  },
  "oklch": {
    "l": 0.35529,
    "c": 0.18901,
    "h": 270.6
  },
  "luminance": 0.03836
}

Semantic roles & 50–950 ramp

primary

#1F229C

secondary

#C1BF55

accent

#E63EEA

background

#F7F5FB

surface

#EEE9F6

border

#C9C5D0

text

#0A0512

muted

#7C7981

Preview Lab

Preview with #1F229C

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

Preview Lab → · Contrast checker → · Palette generator →