#231FB3#231FB3

#231FB3 is a dark, highly saturated blue. Relative luminance 0.046; OKLCH L 38.1% C 0.218 H 270.6°. Best body text is #FFFFFF at 10.95:1 contrast (WCAG AA passes).

Color values

HEX	#231FB3
RGB	rgb(35, 31, 179)
HSL	hsl(242, 70%, 41%)
HSV	hsv(242, 83%, 70%)
CMYK	cmyk(80.4%, 82.7%, 0%, 29.8%)
CIE-LAB	lab(25.54, 51.51, -75.16)
CIE-LCH	lch(25.54, 91.12, 304.42°)
OKLab	oklab(38.07% 0.0023 -0.2175)
OKLCH	oklch(38.07% 0.218 270.6)
XYZ	xyz(9.3171, 4.5909, 43.0342)
Luminance	0.0459 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#231FB3 #AFB31F

analogous

#1F65B3 #231FB3 #6D1FB3

triadic

#231FB3 #B3231F #1FB323

tetradic

#231FB3 #B31F65 #AFB31F #1FB36D

square

#231FB3 #B31F65 #AFB31F #1FB36D

split-complementary

#231FB3 #B36D1F #65B31F

monochromatic

#0F0D4B #19167F #231FB3 #3833DC #6B68E5

Accessibility & contrast

On white

10.95

#231FB3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.92

#231FB3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #231FB3

10.95:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##231FB3	#FFFFFF	#000000	##FFFFFF
##231FB3	1.00	10.95	1.92	10.95
#FFFFFF	10.95	1.00	21.00	1.00
#000000	1.92	21.00	1.00	21.00
##FFFFFF	10.95	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0044B7

Deuteranopia (green-blind)

#0035B1

Tritanopia (blue-blind)

#004F6B

Achromatopsia (no color)

#3C3C3C

Design tokens & code

CSS

--color: #231fb3;
/* rgb */ color: rgb(35, 31, 179);
/* oklch */ color: oklch(38.1% 0.218 270.6);

Tailwind

colors: {
  custom: {
    50: '#7a5fcb',
    500: '#231fb3',
    950: '#000000',
  },
}

SCSS

$custom: #231fb3;
$custom-light: #7a5fcb;
$custom-dark: #000000;

JSON

{
  "hex": "#231fb3",
  "rgb": {
    "r": 35,
    "g": 31,
    "b": 179
  },
  "hsl": {
    "h": 241.622,
    "s": 70.476,
    "l": 41.176
  },
  "oklch": {
    "l": 0.38065,
    "c": 0.21756,
    "h": 270.6
  },
  "luminance": 0.04592
}

Semantic roles & 50–950 ramp

primary

#231FB3

secondary

#C7CA64

accent

#ED3BE8

background

#F8F5FC

surface

#EFEAF9

border

#CAC6D2

text

#0B0514

muted

#7C7982

Preview Lab

Preview with #231FB3

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

Preview Lab → · Contrast checker → · Palette generator →