#42309E#42309E

#42309E is a dark, vivid blue. Relative luminance 0.057; OKLCH L 40.3% C 0.169 H 283.2°. Best body text is #FFFFFF at 9.78:1 contrast (WCAG AA passes).

Color values

HEX	#42309E
RGB	rgb(66, 48, 158)
HSL	hsl(250, 53%, 40%)
HSV	hsv(250, 70%, 62%)
CMYK	cmyk(58.2%, 69.6%, 0%, 38%)
CIE-LAB	lab(28.75, 38.95, -57.12)
CIE-LCH	lch(28.75, 69.14, 304.29°)
OKLab	oklab(40.25% 0.0387 -0.1644)
OKLCH	oklch(40.25% 0.169 283.2)
XYZ	xyz(9.4734, 5.7402, 32.9499)
Luminance	0.0574 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

#533CC6

ΔE00 6.76

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#42309E #8C9E30

analogous

#30559E #42309E #79309E

triadic

#42309E #9E4230 #309E42

tetradic

#42309E #9E3055 #8C9E30 #309E79

square

#42309E #9E3055 #8C9E30 #309E79

split-complementary

#42309E #9E7930 #559E30

monochromatic

#1B1340 #2E226F #42309E #5A45C6 #8474D5

Accessibility & contrast

On white

9.78

#42309E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.15

#42309E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #42309E

9.78:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##42309E	#FFFFFF	#000000	##FFFFFF
##42309E	1.00	9.78	2.15	9.78
#FFFFFF	9.78	1.00	21.00	1.00
#000000	2.15	21.00	1.00	21.00
##FFFFFF	9.78	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0047A1

Deuteranopia (green-blind)

#00409C

Tritanopia (blue-blind)

#104D63

Achromatopsia (no color)

#444444

Design tokens & code

CSS

--color: #42309e;
/* rgb */ color: rgb(66, 48, 158);
/* oklch */ color: oklch(40.3% 0.169 283.2);

Tailwind

colors: {
  custom: {
    50: '#816abc',
    500: '#42309e',
    950: '#000000',
  },
}

SCSS

$custom: #42309e;
$custom-light: #816abc;
$custom-dark: #000000;

JSON

{
  "hex": "#42309e",
  "rgb": {
    "r": 66,
    "g": 48,
    "b": 158
  },
  "hsl": {
    "h": 249.818,
    "s": 53.398,
    "l": 40.392
  },
  "oklch": {
    "l": 0.40252,
    "c": 0.16889,
    "h": 283.2
  },
  "luminance": 0.05741
}

Semantic roles & 50–950 ramp

primary

#42309E

secondary

#B0BD6D

accent

#DD4BC5

background

#F8F6FB

surface

#EFEBF6

border

#CAC6D0

text

#0B0612

muted

#7C7A81

Preview Lab

Preview with #42309E

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

Preview Lab → · Contrast checker → · Palette generator →