#42588D#42588D

#42588D is a mid, moderate blue. Relative luminance 0.101; OKLCH L 46.8% C 0.091 H 265.9°. Best body text is #FFFFFF at 6.97:1 contrast (WCAG AA passes).

Color values

HEX	#42588D
RGB	rgb(66, 88, 141)
HSL	hsl(222, 36%, 41%)
HSV	hsv(222, 53%, 55%)
CMYK	cmyk(53.2%, 37.6%, 0%, 44.7%)
CIE-LAB	lab(37.95, 7.69, -31.98)
CIE-LCH	lch(37.95, 32.89, 283.53°)
OKLab	oklab(46.77% -0.0064 -0.0903)
OKLCH	oklch(46.77% 0.091 265.9)
XYZ	xyz(10.5426, 10.0601, 26.5804)
Luminance	0.1006 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#42588D #8D7742

analogous

#427D8D #42588D #51428D

triadic

#42588D #8D4258 #588D42

tetradic

#42588D #8D427D #8D7742 #428D51

square

#42588D #8D427D #8D7742 #428D51

split-complementary

#42588D #8D5142 #7D8D42

monochromatic

#1B243A #2E3E63 #42588D #5A74B2 #8497C5

Accessibility & contrast

On white

6.97

#42588D on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.01

#42588D on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #42588D

6.97:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##42588D	#FFFFFF	#000000	##FFFFFF
##42588D	1.00	6.97	3.01	6.97
#FFFFFF	6.97	1.00	21.00	1.00
#000000	3.01	21.00	1.00	21.00
##FFFFFF	6.97	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#435D8F

Deuteranopia (green-blind)

#3B568C

Tritanopia (blue-blind)

#1E636C

Achromatopsia (no color)

#595959

Design tokens & code

CSS

--color: #42588d;
/* rgb */ color: rgb(66, 88, 141);
/* oklch */ color: oklch(46.8% 0.091 265.9);

Tailwind

colors: {
  custom: {
    50: '#7b86ae',
    500: '#42588d',
    950: '#000000',
  },
}

SCSS

$custom: #42588d;
$custom-light: #7b86ae;
$custom-dark: #000000;

JSON

{
  "hex": "#42588d",
  "rgb": {
    "r": 66,
    "g": 88,
    "b": 141
  },
  "hsl": {
    "h": 222.4,
    "s": 36.232,
    "l": 40.588
  },
  "oklch": {
    "l": 0.46768,
    "c": 0.09055,
    "h": 265.9
  },
  "luminance": 0.10061
}

Semantic roles & 50–950 ramp

primary

#42588D

secondary

#B0A07B

accent

#AB5CCC

background

#F7F8FA

surface

#EEEFF4

border

#C9CACE

text

#0A0B10

muted

#7C7C7F

Preview Lab

Preview with #42588D

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

Preview Lab → · Contrast checker → · Palette generator →