#231B8C#231B8C

#231B8C is a dark, vivid blue. Relative luminance 0.030; OKLCH L 33.0% C 0.175 H 274.2°. Best body text is #FFFFFF at 13.07:1 contrast (WCAG AA passes).

Color values

HEX	#231B8C
RGB	rgb(35, 27, 140)
HSL	hsl(244, 68%, 33%)
HSV	hsv(244, 81%, 55%)
CMYK	cmyk(75%, 80.7%, 0%, 45.1%)
CIE-LAB	lab(20.18, 41.09, -60.23)
CIE-LCH	lch(20.18, 72.91, 304.31°)
OKLab	oklab(32.99% 0.0128 -0.1742)
OKLCH	oklch(32.99% 0.175 274.2)
XYZ	xyz(5.8171, 3.0341, 25.0849)
Luminance	0.0303 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#231B8C #848C1B

analogous

#1B4B8C #231B8C #5C1B8C

triadic

#231B8C #8C231B #1B8C23

tetradic

#231B8C #8C1B4B #848C1B #1B8C5C

square

#231B8C #8C1B4B #848C1B #1B8C5C

split-complementary

#231B8C #8C5C1B #4B8C1B

monochromatic

#090725 #161159 #231B8C #3025BF #5146DB

Accessibility & contrast

On white

13.07

#231B8C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.61

#231B8C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #231B8C

13.07:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##231B8C	#FFFFFF	#000000	##FFFFFF
##231B8C	1.00	13.07	1.61	13.07
#FFFFFF	13.07	1.00	21.00	1.00
#000000	1.61	21.00	1.00	21.00
##FFFFFF	13.07	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00368F

Deuteranopia (green-blind)

#002B8A

Tritanopia (blue-blind)

#003E53

Achromatopsia (no color)

#313131

Design tokens & code

CSS

--color: #231b8c;
/* rgb */ color: rgb(35, 27, 140);
/* oklch */ color: oklch(33.0% 0.175 274.2);

Tailwind

colors: {
  custom: {
    50: '#715aaf',
    500: '#231b8c',
    950: '#000000',
  },
}

SCSS

$custom: #231b8c;
$custom-light: #715aaf;
$custom-dark: #000000;

JSON

{
  "hex": "#231b8c",
  "rgb": {
    "r": 35,
    "g": 27,
    "b": 140
  },
  "hsl": {
    "h": 244.248,
    "s": 67.665,
    "l": 32.745
  },
  "oklch": {
    "l": 0.32989,
    "c": 0.17468,
    "h": 274.2
  },
  "luminance": 0.03035
}

Semantic roles & 50–950 ramp

primary

#231B8C

secondary

#B4BD46

accent

#EB3DDE

background

#F7F5FA

surface

#EDE9F5

border

#C8C5CF

text

#090411

muted

#7B7980

Preview Lab

Preview with #231B8C

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

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