#42389B#42389B

#42389B is a dark, vivid blue. Relative luminance 0.064; OKLCH L 41.3% C 0.155 H 281.8°. Best body text is #FFFFFF at 9.25:1 contrast (WCAG AA passes).

Color values

HEX	#42389B
RGB	rgb(66, 56, 155)
HSL	hsl(246, 47%, 41%)
HSV	hsv(246, 64%, 61%)
CMYK	cmyk(57.4%, 63.9%, 0%, 39.2%)
CIE-LAB	lab(30.28, 33.15, -52.79)
CIE-LCH	lch(30.28, 62.33, 302.13°)
OKLab	oklab(41.29% 0.0316 -0.1517)
OKLCH	oklch(41.29% 0.155 281.8)
XYZ	xyz(9.5755, 6.3525, 31.7256)
Luminance	0.0635 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#42389B #919B38

analogous

#38609B #42389B #74389B

triadic

#42389B #9B4238 #389B42

tetradic

#42389B #9B3860 #919B38 #389B74

square

#42389B #9B3860 #919B38 #389B74

split-complementary

#42389B #9B7438 #609B38

monochromatic

#1C1841 #2F286E #42389B #5C50C0 #867DD0

Accessibility & contrast

On white

9.25

#42389B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.27

#42389B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #42389B

9.25:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##42389B	#FFFFFF	#000000	##FFFFFF
##42389B	1.00	9.25	2.27	9.25
#FFFFFF	9.25	1.00	21.00	1.00
#000000	2.27	21.00	1.00	21.00
##FFFFFF	9.25	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004B9E

Deuteranopia (green-blind)

#004499

Tritanopia (blue-blind)

#145064

Achromatopsia (no color)

#474747

Design tokens & code

CSS

--color: #42389b;
/* rgb */ color: rgb(66, 56, 155);
/* oklch */ color: oklch(41.3% 0.155 281.8);

Tailwind

colors: {
  custom: {
    50: '#7f6fb9',
    500: '#42389b',
    950: '#000000',
  },
}

SCSS

$custom: #42389b;
$custom-light: #7f6fb9;
$custom-dark: #000000;

JSON

{
  "hex": "#42389b",
  "rgb": {
    "r": 66,
    "g": 56,
    "b": 155
  },
  "hsl": {
    "h": 246.061,
    "s": 46.919,
    "l": 41.373
  },
  "oklch": {
    "l": 0.41285,
    "c": 0.15492,
    "h": 281.8
  },
  "luminance": 0.06353
}

Semantic roles & 50–950 ramp

primary

#42389B

secondary

#B3B975

accent

#D751C9

background

#F8F6FB

surface

#EFECF6

border

#CAC7D0

text

#0B0712

muted

#7C7A81

Preview Lab

Preview with #42389B

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

Preview Lab → · Contrast checker → · Palette generator →