#231BB3#231BB3

#231BB3 is a dark, highly saturated blue. Relative luminance 0.044; OKLCH L 37.7% C 0.220 H 270.8°. Best body text is #FFFFFF at 11.17:1 contrast (WCAG AA passes).

Color values

HEX	#231BB3
RGB	rgb(35, 27, 179)
HSL	hsl(243, 74%, 40%)
HSV	hsv(243, 85%, 70%)
CMYK	cmyk(80.4%, 84.9%, 0%, 29.8%)
CIE-LAB	lab(24.94, 53.28, -76.16)
CIE-LCH	lch(24.94, 92.95, 304.98°)
OKLab	oklab(37.65% 0.0031 -0.2203)
OKLCH	oklch(37.65% 0.22 270.8)
XYZ	xyz(9.2190, 4.3948, 43.0015)
Luminance	0.0440 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#231BB3 #ABB31B

analogous

#1B5FB3 #231BB3 #6F1BB3

triadic

#231BB3 #B3231B #1BB323

tetradic

#231BB3 #B31B5F #ABB31B #1BB36F

square

#231BB3 #B31B5F #ABB31B #1BB36F

split-complementary

#231BB3 #B36F1B #5FB31B

monochromatic

#0E0B49 #19137E #231BB3 #352CDF #6861E7

Accessibility & contrast

On white

11.17

#231BB3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.88

#231BB3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #231BB3

11.17:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##231BB3	#FFFFFF	#000000	##FFFFFF
##231BB3	1.00	11.17	1.88	11.17
#FFFFFF	11.17	1.00	21.00	1.00
#000000	1.88	21.00	1.00	21.00
##FFFFFF	11.17	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0042B7

Deuteranopia (green-blind)

#0033B1

Tritanopia (blue-blind)

#004E6A

Achromatopsia (no color)

#3B3B3B

Design tokens & code

CSS

--color: #231bb3;
/* rgb */ color: rgb(35, 27, 179);
/* oklch */ color: oklch(37.7% 0.220 270.8);

Tailwind

colors: {
  custom: {
    50: '#7a5dcb',
    500: '#231bb3',
    950: '#000000',
  },
}

SCSS

$custom: #231bb3;
$custom-light: #7a5dcb;
$custom-dark: #000000;

JSON

{
  "hex": "#231bb3",
  "rgb": {
    "r": 35,
    "g": 27,
    "b": 179
  },
  "hsl": {
    "h": 243.158,
    "s": 73.786,
    "l": 40.392
  },
  "oklch": {
    "l": 0.37651,
    "c": 0.22037,
    "h": 270.8
  },
  "luminance": 0.04396
}

Semantic roles & 50–950 ramp

primary

#231BB3

secondary

#C6CC5E

accent

#F037E7

background

#F8F5FC

surface

#EFE9F9

border

#CAC5D2

text

#0B0514

muted

#7C7982

Preview Lab

Preview with #231BB3

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

Preview Lab → · Contrast checker → · Palette generator →