#231FA1#231FA1

#231FA1 is a dark, vivid blue. Relative luminance 0.039; OKLCH L 35.9% C 0.197 H 271.9°. Best body text is #FFFFFF at 11.78:1 contrast (WCAG AA passes).

Color values

HEX	#231FA1
RGB	rgb(35, 31, 161)
HSL	hsl(242, 68%, 38%)
HSV	hsv(242, 81%, 63%)
CMYK	cmyk(78.3%, 80.7%, 0%, 36.9%)
CIE-LAB	lab(23.37, 45.84, -67.89)
CIE-LCH	lch(23.37, 81.92, 304.03°)
OKLab	oklab(35.94% 0.0064 -0.1965)
OKLCH	oklch(35.94% 0.197 271.9)
XYZ	xyz(7.6140, 3.9097, 34.0647)
Luminance	0.0391 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#231FA1 #9DA11F

analogous

#1F5CA1 #231FA1 #641FA1

triadic

#231FA1 #A1231F #1FA123

tetradic

#231FA1 #A11F5C #9DA11F #1FA164

square

#231FA1 #A11F5C #9DA11F #1FA164

split-complementary

#231FA1 #A1641F #5CA11F

monochromatic

#0D0B3A #18156E #231FA1 #2E29D4 #5F5BDF

Accessibility & contrast

On white

11.78

#231FA1 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.78

#231FA1 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #231FA1

11.78:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##231FA1	#FFFFFF	#000000	##FFFFFF
##231FA1	1.00	11.78	1.78	11.78
#FFFFFF	11.78	1.00	21.00	1.00
#000000	1.78	21.00	1.00	21.00
##FFFFFF	11.78	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003EA5

Deuteranopia (green-blind)

#00319F

Tritanopia (blue-blind)

#004860

Achromatopsia (no color)

#383838

Design tokens & code

CSS

--color: #231fa1;
/* rgb */ color: rgb(35, 31, 161);
/* oklch */ color: oklch(35.9% 0.197 271.9);

Tailwind

colors: {
  custom: {
    50: '#755ebe',
    500: '#231fa1',
    950: '#000000',
  },
}

SCSS

$custom: #231fa1;
$custom-light: #755ebe;
$custom-dark: #000000;

JSON

{
  "hex": "#231fa1",
  "rgb": {
    "r": 35,
    "g": 31,
    "b": 161
  },
  "hsl": {
    "h": 241.846,
    "s": 67.708,
    "l": 37.647
  },
  "oklch": {
    "l": 0.35937,
    "c": 0.1966,
    "h": 271.9
  },
  "luminance": 0.03911
}

Semantic roles & 50–950 ramp

primary

#231FA1

secondary

#C0C458

accent

#EB3DE5

background

#F7F5FB

surface

#EEE9F7

border

#C9C5D0

text

#0A0412

muted

#7C7981

Preview Lab

Preview with #231FA1

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

Preview Lab → · Contrast checker → · Palette generator →