#42409B#42409B

#42409B is a dark, vivid blue. Relative luminance 0.072; OKLCH L 42.7% C 0.144 H 279.3°. Best body text is #FFFFFF at 8.61:1 contrast (WCAG AA passes).

Color values

HEX	#42409B
RGB	rgb(66, 64, 155)
HSL	hsl(241, 42%, 43%)
HSV	hsv(241, 59%, 61%)
CMYK	cmyk(57.4%, 58.7%, 0%, 39.2%)
CIE-LAB	lab(32.24, 28.08, -49.62)
CIE-LCH	lch(32.24, 57.01, 299.51°)
OKLab	oklab(42.72% 0.0234 -0.1423)
OKLCH	oklch(42.72% 0.144 279.3)
XYZ	xyz(9.9947, 7.1909, 31.8653)
Luminance	0.0719 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#42409B #999B40

analogous

#406B9B #42409B #70409B

triadic

#42409B #9B4240 #409B42

tetradic

#42409B #9B406B #999B40 #409B70

square

#42409B #9B406B #999B40 #409B70

split-complementary

#42409B #9B7040 #6B9B40

monochromatic

#1D1C44 #302E70 #42409B #5E5CBC #8988CE

Accessibility & contrast

On white

8.61

#42409B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.44

#42409B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #42409B

8.61:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##42409B	#FFFFFF	#000000	##FFFFFF
##42409B	1.00	8.61	2.44	8.61
#FFFFFF	8.61	1.00	21.00	1.00
#000000	2.44	21.00	1.00	21.00
##FFFFFF	8.61	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004F9E

Deuteranopia (green-blind)

#004899

Tritanopia (blue-blind)

#125567

Achromatopsia (no color)

#4C4C4C

Design tokens & code

CSS

--color: #42409b;
/* rgb */ color: rgb(66, 64, 155);
/* oklch */ color: oklch(42.7% 0.144 279.3);

Tailwind

colors: {
  custom: {
    50: '#7f75b9',
    500: '#42409b',
    950: '#000000',
  },
}

SCSS

$custom: #42409b;
$custom-light: #7f75b9;
$custom-dark: #000000;

JSON

{
  "hex": "#42409b",
  "rgb": {
    "r": 66,
    "g": 64,
    "b": 155
  },
  "hsl": {
    "h": 241.319,
    "s": 41.553,
    "l": 42.941
  },
  "oklch": {
    "l": 0.42721,
    "c": 0.14422,
    "h": 279.3
  },
  "luminance": 0.07192
}

Semantic roles & 50–950 ramp

primary

#42409B

secondary

#B7B87E

accent

#D156CF

background

#F8F7FB

surface

#EFEDF6

border

#CAC8D0

text

#0B0811

muted

#7C7B80

Preview Lab

Preview with #42409B

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

Preview Lab → · Contrast checker → · Palette generator →