#23309B#23309B

#23309B is a dark, vivid blue. Relative luminance 0.048; OKLCH L 37.8% C 0.172 H 270.0°. Best body text is #FFFFFF at 10.67:1 contrast (WCAG AA passes).

Color values

HEX	#23309B
RGB	rgb(35, 48, 155)
HSL	hsl(234, 63%, 37%)
HSV	hsv(234, 77%, 61%)
CMYK	cmyk(77.4%, 69%, 0%, 39.2%)
CIE-LAB	lab(26.26, 33.84, -59.45)
CIE-LCH	lch(26.26, 68.41, 299.65°)
OKLab	oklab(37.81% 0.0001 -0.1721)
OKLCH	oklch(37.81% 0.172 270)
XYZ	xyz(7.6645, 4.8369, 31.5337)
Luminance	0.0484 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#23309B #9B8E23

analogous

#236C9B #23309B #52239B

triadic

#23309B #9B2330 #309B23

tetradic

#23309B #9B236C #9B8E23 #239B52

square

#23309B #9B236C #9B8E23 #239B52

split-complementary

#23309B #9B5223 #6C9B23

monochromatic

#0C1137 #182169 #23309B #2E3FCD #5E6BDB

Accessibility & contrast

On white

10.67

#23309B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.97

#23309B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #23309B

10.67:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##23309B	#FFFFFF	#000000	##FFFFFF
##23309B	1.00	10.67	1.97	10.67
#FFFFFF	10.67	1.00	21.00	1.00
#000000	1.97	21.00	1.00	21.00
##FFFFFF	10.67	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00449E

Deuteranopia (green-blind)

#003899

Tritanopia (blue-blind)

#004D61

Achromatopsia (no color)

#3E3E3E

Design tokens & code

CSS

--color: #23309b;
/* rgb */ color: rgb(35, 48, 155);
/* oklch */ color: oklch(37.8% 0.172 270.0);

Tailwind

colors: {
  custom: {
    50: '#7268ba',
    500: '#23309b',
    950: '#000000',
  },
}

SCSS

$custom: #23309b;
$custom-light: #7268ba;
$custom-dark: #000000;

JSON

{
  "hex": "#23309b",
  "rgb": {
    "r": 35,
    "g": 48,
    "b": 155
  },
  "hsl": {
    "h": 233.5,
    "s": 63.158,
    "l": 37.255
  },
  "oklch": {
    "l": 0.37807,
    "c": 0.17207,
    "h": 270
  },
  "luminance": 0.04838
}

Semantic roles & 50–950 ramp

primary

#23309B

secondary

#BFB45A

accent

#D442E6

background

#F7F6FB

surface

#EEEBF6

border

#C9C6D0

text

#090612

muted

#7B7A81

Preview Lab

Preview with #23309B

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

Preview Lab → · Contrast checker → · Palette generator →