#42489B#42489B

#42489B is a dark, vivid blue. Relative luminance 0.082; OKLCH L 44.3% C 0.133 H 276.4°. Best body text is #FFFFFF at 7.98:1 contrast (WCAG AA passes).

Color values

HEX	#42489B
RGB	rgb(66, 72, 155)
HSL	hsl(236, 40%, 43%)
HSV	hsv(236, 57%, 61%)
CMYK	cmyk(57.4%, 53.5%, 0%, 39.2%)
CIE-LAB	lab(34.31, 22.89, -46.26)
CIE-LCH	lch(34.31, 51.62, 296.32°)
OKLab	oklab(44.27% 0.0148 -0.1324)
OKLCH	oklch(44.27% 0.133 276.4)
XYZ	xyz(10.4786, 8.1588, 32.0266)
Luminance	0.0816 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#42489B #9B9542

analogous

#42749B #42489B #68429B

triadic

#42489B #9B4248 #489B42

tetradic

#42489B #9B4274 #9B9542 #429B68

square

#42489B #9B4274 #9B9542 #429B68

split-complementary

#42489B #9B6842 #749B42

monochromatic

#1D2045 #303470 #42489B #5F65BB #8A8FCD

Accessibility & contrast

On white

7.98

#42489B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.63

#42489B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #42489B

7.98:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##42489B	#FFFFFF	#000000	##FFFFFF
##42489B	1.00	7.98	2.63	7.98
#FFFFFF	7.98	1.00	21.00	1.00
#000000	2.63	21.00	1.00	21.00
##FFFFFF	7.98	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#18549E

Deuteranopia (green-blind)

#034D99

Tritanopia (blue-blind)

#0F5B6A

Achromatopsia (no color)

#515151

Design tokens & code

CSS

--color: #42489b;
/* rgb */ color: rgb(66, 72, 155);
/* oklch */ color: oklch(44.3% 0.133 276.4);

Tailwind

colors: {
  custom: {
    50: '#7e7ab9',
    500: '#42489b',
    950: '#000000',
  },
}

SCSS

$custom: #42489b;
$custom-light: #7e7ab9;
$custom-dark: #000000;

JSON

{
  "hex": "#42489b",
  "rgb": {
    "r": 66,
    "g": 72,
    "b": 155
  },
  "hsl": {
    "h": 235.955,
    "s": 40.271,
    "l": 43.333
  },
  "oklch": {
    "l": 0.44267,
    "c": 0.1332,
    "h": 276.4
  },
  "luminance": 0.0816
}

Semantic roles & 50–950 ramp

primary

#42489B

secondary

#B8B481

accent

#C858D0

background

#F8F7FB

surface

#EFEDF6

border

#CAC8D0

text

#0B0911

muted

#7C7B80

Preview Lab

Preview with #42489B

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

Preview Lab → · Contrast checker → · Palette generator →