#231CB3#231CB3

#231CB3 is a dark, highly saturated blue. Relative luminance 0.044; OKLCH L 37.8% C 0.220 H 270.8°. Best body text is #FFFFFF at 11.12:1 contrast (WCAG AA passes).

Color values

HEX	#231CB3
RGB	rgb(35, 28, 179)
HSL	hsl(243, 73%, 41%)
HSV	hsv(243, 84%, 70%)
CMYK	cmyk(80.4%, 84.4%, 0%, 29.8%)
CIE-LAB	lab(25.08, 52.85, -75.92)
CIE-LCH	lch(25.08, 92.50, 304.85°)
OKLab	oklab(37.75% 0.0029 -0.2197)
OKLCH	oklch(37.75% 0.22 270.8)
XYZ	xyz(9.2423, 4.4414, 43.0093)
Luminance	0.0444 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#231CB3 #ACB31C

analogous

#1C61B3 #231CB3 #6E1CB3

triadic

#231CB3 #B3231C #1CB323

tetradic

#231CB3 #B31C61 #ACB31C #1CB36E

square

#231CB3 #B31C61 #ACB31C #1CB36E

split-complementary

#231CB3 #B36E1C #61B31C

monochromatic

#0E0B49 #19147E #231CB3 #362EDE #6963E7

Accessibility & contrast

On white

11.12

#231CB3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.89

#231CB3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #231CB3

11.12:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##231CB3	#FFFFFF	#000000	##FFFFFF
##231CB3	1.00	11.12	1.89	11.12
#FFFFFF	11.12	1.00	21.00	1.00
#000000	1.89	21.00	1.00	21.00
##FFFFFF	11.12	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0043B7

Deuteranopia (green-blind)

#0034B1

Tritanopia (blue-blind)

#004E6A

Achromatopsia (no color)

#3B3B3B

Design tokens & code

CSS

--color: #231cb3;
/* rgb */ color: rgb(35, 28, 179);
/* oklch */ color: oklch(37.8% 0.220 270.8);

Tailwind

colors: {
  custom: {
    50: '#7a5ecb',
    500: '#231cb3',
    950: '#000000',
  },
}

SCSS

$custom: #231cb3;
$custom-light: #7a5ecb;
$custom-dark: #000000;

JSON

{
  "hex": "#231cb3",
  "rgb": {
    "r": 35,
    "g": 28,
    "b": 179
  },
  "hsl": {
    "h": 242.781,
    "s": 72.947,
    "l": 40.588
  },
  "oklch": {
    "l": 0.3775,
    "c": 0.2197,
    "h": 270.8
  },
  "luminance": 0.04443
}

Semantic roles & 50–950 ramp

primary

#231CB3

secondary

#C6CB5F

accent

#F038E7

background

#F8F5FC

surface

#EFE9F9

border

#CAC5D2

text

#0B0514

muted

#7C7982

Preview Lab

Preview with #231CB3

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

Preview Lab → · Contrast checker → · Palette generator →