#42479B#42479B

#42479B is a dark, vivid blue. Relative luminance 0.080; OKLCH L 44.1% C 0.135 H 276.8°. Best body text is #FFFFFF at 8.06:1 contrast (WCAG AA passes).

Color values

HEX	#42479B
RGB	rgb(66, 71, 155)
HSL	hsl(237, 40%, 43%)
HSV	hsv(237, 57%, 61%)
CMYK	cmyk(57.4%, 54.2%, 0%, 39.2%)
CIE-LAB	lab(34.05, 23.54, -46.69)
CIE-LCH	lch(34.05, 52.29, 296.76°)
OKLab	oklab(44.07% 0.0159 -0.1336)
OKLCH	oklch(44.07% 0.135 276.8)
XYZ	xyz(10.4145, 8.0306, 32.0052)
Luminance	0.0803 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#42479B #9B9642

analogous

#42739B #42479B #69429B

triadic

#42479B #9B4247 #479B42

tetradic

#42479B #9B4273 #9B9642 #429B69

square

#42479B #9B4273 #9B9642 #429B69

split-complementary

#42479B #9B6942 #739B42

monochromatic

#1D2045 #303370 #42479B #5F64BB #8A8ECD

Accessibility & contrast

On white

8.06

#42479B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.61

#42479B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #42479B

8.06:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##42479B	#FFFFFF	#000000	##FFFFFF
##42479B	1.00	8.06	2.61	8.06
#FFFFFF	8.06	1.00	21.00	1.00
#000000	2.61	21.00	1.00	21.00
##FFFFFF	8.06	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#15549E

Deuteranopia (green-blind)

#004C99

Tritanopia (blue-blind)

#0F5A6A

Achromatopsia (no color)

#505050

Design tokens & code

CSS

--color: #42479b;
/* rgb */ color: rgb(66, 71, 155);
/* oklch */ color: oklch(44.1% 0.135 276.8);

Tailwind

colors: {
  custom: {
    50: '#7e7ab9',
    500: '#42479b',
    950: '#000000',
  },
}

SCSS

$custom: #42479b;
$custom-light: #7e7ab9;
$custom-dark: #000000;

JSON

{
  "hex": "#42479b",
  "rgb": {
    "r": 66,
    "g": 71,
    "b": 155
  },
  "hsl": {
    "h": 236.629,
    "s": 40.271,
    "l": 43.333
  },
  "oklch": {
    "l": 0.44069,
    "c": 0.13458,
    "h": 276.8
  },
  "luminance": 0.08031
}

Semantic roles & 50–950 ramp

primary

#42479B

secondary

#B8B581

accent

#C958D0

background

#F8F7FB

surface

#EFEDF6

border

#CAC8D0

text

#0B0911

muted

#7C7B80

Preview Lab

Preview with #42479B

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

Preview Lab → · Contrast checker → · Palette generator →