#42439D#42439D

#42439D is a dark, vivid blue. Relative luminance 0.076; OKLCH L 43.4% C 0.143 H 278.2°. Best body text is #FFFFFF at 8.33:1 contrast (WCAG AA passes).

Color values

HEX	#42439D
RGB	rgb(66, 67, 157)
HSL	hsl(239, 41%, 44%)
HSV	hsv(239, 58%, 62%)
CMYK	cmyk(58%, 57.3%, 0%, 38.4%)
CIE-LAB	lab(33.15, 26.82, -49.35)
CIE-LCH	lch(33.15, 56.17, 298.52°)
OKLab	oklab(43.44% 0.0203 -0.1415)
OKLCH	oklch(43.44% 0.143 278.2)
XYZ	xyz(10.3378, 7.6062, 32.8151)
Luminance	0.0761 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#42439D #9D9C42

analogous

#42709D #42439D #6E429D

triadic

#42439D #9D4243 #439D42

tetradic

#42439D #9D4270 #9D9C42 #429D6E

square

#42439D #9D4270 #9D9C42 #429D6E

split-complementary

#42439D #9D6E42 #709D42

monochromatic

#1E1E47 #303172 #42439D #6061BC #8B8CCE

Accessibility & contrast

On white

8.33

#42439D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.52

#42439D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #42439D

8.33:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##42439D	#FFFFFF	#000000	##FFFFFF
##42439D	1.00	8.33	2.52	8.33
#FFFFFF	8.33	1.00	21.00	1.00
#000000	2.52	21.00	1.00	21.00
##FFFFFF	8.33	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0052A0

Deuteranopia (green-blind)

#004A9B

Tritanopia (blue-blind)

#0C5869

Achromatopsia (no color)

#4E4E4E

Design tokens & code

CSS

--color: #42439d;
/* rgb */ color: rgb(66, 67, 157);
/* oklch */ color: oklch(43.4% 0.143 278.2);

Tailwind

colors: {
  custom: {
    50: '#7f77bb',
    500: '#42439d',
    950: '#000000',
  },
}

SCSS

$custom: #42439d;
$custom-light: #7f77bb;
$custom-dark: #000000;

JSON

{
  "hex": "#42439d",
  "rgb": {
    "r": 66,
    "g": 67,
    "b": 157
  },
  "hsl": {
    "h": 239.341,
    "s": 40.807,
    "l": 43.725
  },
  "oklch": {
    "l": 0.43444,
    "c": 0.14295,
    "h": 278.2
  },
  "luminance": 0.07607
}

Semantic roles & 50–950 ramp

primary

#42439D

secondary

#B9B982

accent

#CF57D1

background

#F8F7FB

surface

#EFEDF6

border

#CAC8D0

text

#0B0812

muted

#7C7B81

Preview Lab

Preview with #42439D

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

Preview Lab → · Contrast checker → · Palette generator →