#42398C#42398C

#42398C is a dark, vivid blue. Relative luminance 0.060; OKLCH L 40.2% C 0.133 H 283.6°. Best body text is #FFFFFF at 9.56:1 contrast (WCAG AA passes).

Color values

HEX	#42398C
RGB	rgb(66, 57, 140)
HSL	hsl(247, 42%, 39%)
HSV	hsv(247, 59%, 55%)
CMYK	cmyk(52.9%, 59.3%, 0%, 45.1%)
CIE-LAB	lab(29.36, 27.59, -45.10)
CIE-LCH	lch(29.36, 52.87, 301.45°)
OKLab	oklab(40.23% 0.0312 -0.1291)
OKLCH	oklch(40.23% 0.133 283.6)
XYZ	xyz(8.4421, 5.9775, 25.5148)
Luminance	0.0598 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#42398C #838C39

analogous

#39598C #42398C #6B398C

triadic

#42398C #8C4239 #398C42

tetradic

#42398C #8C3959 #838C39 #398C6B

square

#42398C #8C3959 #838C39 #398C6B

split-complementary

#42398C #8C6B39 #598C39

monochromatic

#191635 #2D2761 #42398C #584CB6 #8078C8

Accessibility & contrast

On white

9.56

#42398C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.20

#42398C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #42398C

9.56:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##42398C	#FFFFFF	#000000	##FFFFFF
##42398C	1.00	9.56	2.20	9.56
#FFFFFF	9.56	1.00	21.00	1.00
#000000	2.20	21.00	1.00	21.00
##FFFFFF	9.56	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00488F

Deuteranopia (green-blind)

#00428A

Tritanopia (blue-blind)

#254C5D

Achromatopsia (no color)

#454545

Design tokens & code

CSS

--color: #42398c;
/* rgb */ color: rgb(66, 57, 140);
/* oklch */ color: oklch(40.2% 0.133 283.6);

Tailwind

colors: {
  custom: {
    50: '#7d6fae',
    500: '#42398c',
    950: '#000000',
  },
}

SCSS

$custom: #42398c;
$custom-light: #7d6fae;
$custom-dark: #000000;

JSON

{
  "hex": "#42398c",
  "rgb": {
    "r": 66,
    "g": 57,
    "b": 140
  },
  "hsl": {
    "h": 246.506,
    "s": 42.132,
    "l": 38.627
  },
  "oklch": {
    "l": 0.40234,
    "c": 0.13279,
    "h": 283.6
  },
  "luminance": 0.05978
}

Semantic roles & 50–950 ramp

primary

#42398C

secondary

#AAB170

accent

#D256C4

background

#F7F6FA

surface

#EEECF4

border

#C9C7CE

text

#0A0710

muted

#7C7A7F

Preview Lab

Preview with #42398C

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

Preview Lab → · Contrast checker → · Palette generator →