#42537D#42537D

#42537D is a dark, moderate blue. Relative luminance 0.088; OKLCH L 44.7% C 0.073 H 266.7°. Best body text is #FFFFFF at 7.59:1 contrast (WCAG AA passes).

Color values

HEX	#42537D
RGB	rgb(66, 83, 125)
HSL	hsl(223, 31%, 37%)
HSV	hsv(223, 47%, 49%)
CMYK	cmyk(47.2%, 33.6%, 0%, 51%)
CIE-LAB	lab(35.65, 5.63, -25.82)
CIE-LCH	lch(35.65, 26.43, 282.30°)
OKLab	oklab(44.71% -0.0042 -0.0724)
OKLCH	oklch(44.71% 0.073 266.7)
XYZ	xyz(9.0405, 8.8249, 20.6251)
Luminance	0.0882 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#42537D #7D6C42

analogous

#42707D #42537D #4F427D

triadic

#42537D #7D4253 #537D42

tetradic

#42537D #7D4270 #7D6C42 #427D4F

square

#42537D #7D4270 #7D6C42 #427D4F

split-complementary

#42537D #7D4F42 #707D42

monochromatic

#181E2D #2D3855 #42537D #576EA5 #7E90BB

Accessibility & contrast

On white

7.59

#42537D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.76

#42537D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #42537D

7.59:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##42537D	#FFFFFF	#000000	##FFFFFF
##42537D	1.00	7.59	2.76	7.59
#FFFFFF	7.59	1.00	21.00	1.00
#000000	2.76	21.00	1.00	21.00
##FFFFFF	7.59	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#44577F

Deuteranopia (green-blind)

#3E517C

Tritanopia (blue-blind)

#2C5C62

Achromatopsia (no color)

#545454

Design tokens & code

CSS

--color: #42537d;
/* rgb */ color: rgb(66, 83, 125);
/* oklch */ color: oklch(44.7% 0.073 266.7);

Tailwind

colors: {
  custom: {
    50: '#7983a3',
    500: '#42537d',
    950: '#000000',
  },
}

SCSS

$custom: #42537d;
$custom-light: #7983a3;
$custom-dark: #000000;

JSON

{
  "hex": "#42537d",
  "rgb": {
    "r": 66,
    "g": 83,
    "b": 125
  },
  "hsl": {
    "h": 222.712,
    "s": 30.89,
    "l": 37.451
  },
  "oklch": {
    "l": 0.4471,
    "c": 0.07256,
    "h": 266.7
  },
  "luminance": 0.08825
}

Semantic roles & 50–950 ramp

primary

#42537D

secondary

#A69875

accent

#AA61C7

background

#F7F7FA

surface

#EEEEF3

border

#C9C9CD

text

#090A0F

muted

#7B7C7F

Preview Lab

Preview with #42537D

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

Preview Lab → · Contrast checker → · Palette generator →