#42579E#42579E

#42579E is a mid, moderate blue. Relative luminance 0.104; OKLCH L 47.6% C 0.117 H 269.2°. Best body text is #FFFFFF at 6.80:1 contrast (WCAG AA passes).

Color values

HEX	#42579E
RGB	rgb(66, 87, 158)
HSL	hsl(226, 41%, 44%)
HSV	hsv(226, 58%, 62%)
CMYK	cmyk(58.2%, 44.9%, 0%, 38%)
CIE-LAB	lab(38.62, 14.15, -41.15)
CIE-LCH	lch(38.62, 43.52, 288.98°)
OKLab	oklab(47.6% -0.0016 -0.1172)
OKLCH	oklch(47.6% 0.117 269.2)
XYZ	xyz(11.8245, 10.4423, 33.7336)
Luminance	0.1044 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#42579E #9E8942

analogous

#42859E #42579E #5B429E

triadic

#42579E #9E4257 #579E42

tetradic

#42579E #9E4285 #9E8942 #429E5B

square

#42579E #9E4285 #9E8942 #429E5B

split-complementary

#42579E #9E5B42 #859E42

monochromatic

#1E2748 #303F73 #42579E #6076BD #8C9BCF

Accessibility & contrast

On white

6.80

#42579E on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.09

#42579E on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #42579E

6.80:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##42579E	#FFFFFF	#000000	##FFFFFF
##42579E	1.00	6.80	3.09	6.80
#FFFFFF	6.80	1.00	21.00	1.00
#000000	3.09	21.00	1.00	21.00
##FFFFFF	6.80	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#375FA1

Deuteranopia (green-blind)

#2B579C

Tritanopia (blue-blind)

#006773

Achromatopsia (no color)

#5B5B5B

Design tokens & code

CSS

--color: #42579e;
/* rgb */ color: rgb(66, 87, 158);
/* oklch */ color: oklch(47.6% 0.117 269.2);

Tailwind

colors: {
  custom: {
    50: '#7e86bb',
    500: '#42579e',
    950: '#000000',
  },
}

SCSS

$custom: #42579e;
$custom-light: #7e86bb;
$custom-dark: #000000;

JSON

{
  "hex": "#42579e",
  "rgb": {
    "r": 66,
    "g": 87,
    "b": 158
  },
  "hsl": {
    "h": 226.304,
    "s": 41.071,
    "l": 43.922
  },
  "oklch": {
    "l": 0.476,
    "c": 0.11718,
    "h": 269.2
  },
  "luminance": 0.10443
}

Semantic roles & 50–950 ramp

primary

#42579E

secondary

#BAAD82

accent

#B557D1

background

#F8F8FB

surface

#EFEFF6

border

#CACAD0

text

#0A0B12

muted

#7C7C81

Preview Lab

Preview with #42579E

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

Preview Lab → · Contrast checker → · Palette generator →