#40309B#40309B

#40309B is a dark, vivid blue. Relative luminance 0.056; OKLCH L 39.8% C 0.165 H 282.7°. Best body text is #FFFFFF at 9.93:1 contrast (WCAG AA passes).

Color values

HEX	#40309B
RGB	rgb(64, 48, 155)
HSL	hsl(249, 53%, 40%)
HSV	hsv(249, 69%, 61%)
CMYK	cmyk(58.7%, 69%, 0%, 39.2%)
CIE-LAB	lab(28.30, 37.67, -56.04)
CIE-LCH	lch(28.30, 67.52, 303.91°)
OKLab	oklab(39.8% 0.0363 -0.1613)
OKLCH	oklch(39.8% 0.165 282.7)
XYZ	xyz(9.0859, 5.5699, 31.6003)
Luminance	0.0557 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#40309B #8B9B30

analogous

#30569B #40309B #76309B

triadic

#40309B #9B4030 #309B40

tetradic

#40309B #9B3056 #8B9B30 #309B76

square

#40309B #9B3056 #8B9B30 #309B76

split-complementary

#40309B #9B7630 #569B30

monochromatic

#19133E #2D226C #40309B #5743C5 #8172D3

Accessibility & contrast

On white

9.93

#40309B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.11

#40309B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #40309B

9.93:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##40309B	#FFFFFF	#000000	##FFFFFF
##40309B	1.00	9.93	2.11	9.93
#FFFFFF	9.93	1.00	21.00	1.00
#000000	2.11	21.00	1.00	21.00
##FFFFFF	9.93	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00469E

Deuteranopia (green-blind)

#003F99

Tritanopia (blue-blind)

#0B4C61

Achromatopsia (no color)

#434343

Design tokens & code

CSS

--color: #40309b;
/* rgb */ color: rgb(64, 48, 155);
/* oklch */ color: oklch(39.8% 0.165 282.7);

Tailwind

colors: {
  custom: {
    50: '#7f6ab9',
    500: '#40309b',
    950: '#000000',
  },
}

SCSS

$custom: #40309b;
$custom-light: #7f6ab9;
$custom-dark: #000000;

JSON

{
  "hex": "#40309b",
  "rgb": {
    "r": 64,
    "g": 48,
    "b": 155
  },
  "hsl": {
    "h": 248.972,
    "s": 52.709,
    "l": 39.804
  },
  "oklch": {
    "l": 0.39804,
    "c": 0.16532,
    "h": 282.7
  },
  "luminance": 0.0557
}

Semantic roles & 50–950 ramp

primary

#40309B

secondary

#AFBB6C

accent

#DC4CC7

background

#F8F6FB

surface

#EFEBF6

border

#CAC6D0

text

#0B0612

muted

#7C7A81

Preview Lab

Preview with #40309B

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

Preview Lab → · Contrast checker → · Palette generator →