#42339E#42339E

#42339E is a dark, vivid blue. Relative luminance 0.060; OKLCH L 40.7% C 0.165 H 282.6°. Best body text is #FFFFFF at 9.55:1 contrast (WCAG AA passes).

Color values

HEX	#42339E
RGB	rgb(66, 51, 158)
HSL	hsl(248, 51%, 41%)
HSV	hsv(248, 68%, 62%)
CMYK	cmyk(58.2%, 67.7%, 0%, 38%)
CIE-LAB	lab(29.40, 37.18, -56.06)
CIE-LCH	lch(29.40, 67.27, 303.55°)
OKLab	oklab(40.72% 0.036 -0.1613)
OKLCH	oklch(40.72% 0.165 282.6)
XYZ	xyz(9.6002, 5.9939, 32.9922)
Luminance	0.0600 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

#533CC6

ΔE00 6.52

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#42339E #8F9E33

analogous

#33599E #42339E #77339E

triadic

#42339E #9E4233 #339E42

tetradic

#42339E #9E3359 #8F9E33 #339E77

square

#42339E #9E3359 #8F9E33 #339E77

split-complementary

#42339E #9E7733 #599E33

monochromatic

#1B1541 #2F2470 #42339E #5B4AC4 #8578D3

Accessibility & contrast

On white

9.55

#42339E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.20

#42339E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #42339E

9.55:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##42339E	#FFFFFF	#000000	##FFFFFF
##42339E	1.00	9.55	2.20	9.55
#FFFFFF	9.55	1.00	21.00	1.00
#000000	2.20	21.00	1.00	21.00
##FFFFFF	9.55	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0049A1

Deuteranopia (green-blind)

#00429C

Tritanopia (blue-blind)

#0F4E64

Achromatopsia (no color)

#454545

Design tokens & code

CSS

--color: #42339e;
/* rgb */ color: rgb(66, 51, 158);
/* oklch */ color: oklch(40.7% 0.165 282.6);

Tailwind

colors: {
  custom: {
    50: '#806cbc',
    500: '#42339e',
    950: '#000000',
  },
}

SCSS

$custom: #42339e;
$custom-light: #806cbc;
$custom-dark: #000000;

JSON

{
  "hex": "#42339e",
  "rgb": {
    "r": 66,
    "g": 51,
    "b": 158
  },
  "hsl": {
    "h": 248.411,
    "s": 51.196,
    "l": 40.98
  },
  "oklch": {
    "l": 0.40719,
    "c": 0.16526,
    "h": 282.6
  },
  "luminance": 0.05995
}

Semantic roles & 50–950 ramp

primary

#42339E

secondary

#B1BC71

accent

#DB4DC7

background

#F8F6FB

surface

#EFEBF6

border

#CAC6D0

text

#0B0712

muted

#7C7A81

Preview Lab

Preview with #42339E

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

Preview Lab → · Contrast checker → · Palette generator →