#231F99#231F99

#231F99 is a dark, vivid blue. Relative luminance 0.036; OKLCH L 35.0% C 0.187 H 272.5°. Best body text is #FFFFFF at 12.16:1 contrast (WCAG AA passes).

Color values

HEX	#231F99
RGB	rgb(35, 31, 153)
HSL	hsl(242, 66%, 36%)
HSV	hsv(242, 80%, 60%)
CMYK	cmyk(77.1%, 79.7%, 0%, 40%)
CIE-LAB	lab(22.43, 43.24, -64.55)
CIE-LCH	lch(22.43, 77.70, 303.82°)
OKLab	oklab(35.01% 0.0082 -0.1868)
OKLCH	oklch(35.01% 0.187 272.5)
XYZ	xyz(6.9310, 3.6365, 30.4674)
Luminance	0.0364 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#231F99 #95991F

analogous

#1F5899 #231F99 #601F99

triadic

#231F99 #99231F #1F9923

tetradic

#231F99 #991F58 #95991F #1F9960

square

#231F99 #991F58 #95991F #1F9960

split-complementary

#231F99 #99601F #58991F

monochromatic

#0C0A33 #171566 #231F99 #2F29CC #5A56DD

Accessibility & contrast

On white

12.16

#231F99 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.73

#231F99 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #231F99

12.16:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##231F99	#FFFFFF	#000000	##FFFFFF
##231F99	1.00	12.16	1.73	12.16
#FFFFFF	12.16	1.00	21.00	1.00
#000000	1.73	21.00	1.00	21.00
##FFFFFF	12.16	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003B9C

Deuteranopia (green-blind)

#003097

Tritanopia (blue-blind)

#00445C

Achromatopsia (no color)

#363636

Design tokens & code

CSS

--color: #231f99;
/* rgb */ color: rgb(35, 31, 153);
/* oklch */ color: oklch(35.0% 0.187 272.5);

Tailwind

colors: {
  custom: {
    50: '#735db8',
    500: '#231f99',
    950: '#000000',
  },
}

SCSS

$custom: #231f99;
$custom-light: #735db8;
$custom-dark: #000000;

JSON

{
  "hex": "#231f99",
  "rgb": {
    "r": 35,
    "g": 31,
    "b": 153
  },
  "hsl": {
    "h": 241.967,
    "s": 66.304,
    "l": 36.078
  },
  "oklch": {
    "l": 0.35007,
    "c": 0.187,
    "h": 272.5
  },
  "luminance": 0.03637
}

Semantic roles & 50–950 ramp

primary

#231F99

secondary

#BDC054

accent

#E93FE4

background

#F7F5FB

surface

#EEE9F6

border

#C9C5D0

text

#0A0412

muted

#7C7981

Preview Lab

Preview with #231F99

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

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