#42579D#42579D

#42579D is a mid, moderate blue. Relative luminance 0.104; OKLCH L 47.5% C 0.116 H 269.1°. Best body text is #FFFFFF at 6.81:1 contrast (WCAG AA passes).

Color values

HEX	#42579D
RGB	rgb(66, 87, 157)
HSL	hsl(226, 41%, 44%)
HSV	hsv(226, 58%, 62%)
CMYK	cmyk(58%, 44.6%, 0%, 38.4%)
CIE-LAB	lab(38.57, 13.80, -40.65)
CIE-LCH	lch(38.57, 42.93, 288.76°)
OKLab	oklab(47.54% -0.0018 -0.1157)
OKLCH	oklch(47.54% 0.116 269.1)
XYZ	xyz(11.7387, 10.4081, 33.2821)
Luminance	0.1041 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#42579D #9D8842

analogous

#42849D #42579D #5A429D

triadic

#42579D #9D4257 #579D42

tetradic

#42579D #9D4284 #9D8842 #429D5A

square

#42579D #9D4284 #9D8842 #429D5A

split-complementary

#42579D #9D5A42 #849D42

monochromatic

#1E2747 #303F72 #42579D #6075BC #8B9BCE

Accessibility & contrast

On white

6.81

#42579D on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.08

#42579D on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #42579D

6.81:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##42579D	#FFFFFF	#000000	##FFFFFF
##42579D	1.00	6.81	3.08	6.81
#FFFFFF	6.81	1.00	21.00	1.00
#000000	3.08	21.00	1.00	21.00
##FFFFFF	6.81	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#385FA0

Deuteranopia (green-blind)

#2C579C

Tritanopia (blue-blind)

#036672

Achromatopsia (no color)

#5B5B5B

Design tokens & code

CSS

--color: #42579d;
/* rgb */ color: rgb(66, 87, 157);
/* oklch */ color: oklch(47.5% 0.116 269.1);

Tailwind

colors: {
  custom: {
    50: '#7e86ba',
    500: '#42579d',
    950: '#000000',
  },
}

SCSS

$custom: #42579d;
$custom-light: #7e86ba;
$custom-dark: #000000;

JSON

{
  "hex": "#42579d",
  "rgb": {
    "r": 66,
    "g": 87,
    "b": 157
  },
  "hsl": {
    "h": 226.154,
    "s": 40.807,
    "l": 43.725
  },
  "oklch": {
    "l": 0.47535,
    "c": 0.11571,
    "h": 269.1
  },
  "luminance": 0.10409
}

Semantic roles & 50–950 ramp

primary

#42579D

secondary

#B9AC82

accent

#B557D1

background

#F8F8FB

surface

#EFEFF6

border

#CACAD0

text

#0A0B12

muted

#7C7C81

Preview Lab

Preview with #42579D

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

Preview Lab → · Contrast checker → · Palette generator →