#42579F#42579F

#42579F is a mid, moderate blue. Relative luminance 0.105; OKLCH L 47.7% C 0.119 H 269.3°. Best body text is #FFFFFF at 6.78:1 contrast (WCAG AA passes).

Color values

HEX	#42579F
RGB	rgb(66, 87, 159)
HSL	hsl(226, 41%, 44%)
HSV	hsv(226, 58%, 62%)
CMYK	cmyk(58.5%, 45.3%, 0%, 37.6%)
CIE-LAB	lab(38.69, 14.50, -41.65)
CIE-LCH	lch(38.69, 44.10, 289.19°)
OKLab	oklab(47.67% -0.0015 -0.1186)
OKLCH	oklch(47.67% 0.119 269.3)
XYZ	xyz(11.9109, 10.4769, 34.1887)
Luminance	0.1048 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#42579F #9F8A42

analogous

#42869F #42579F #5C429F

triadic

#42579F #9F4257 #579F42

tetradic

#42579F #9F4286 #9F8A42 #429F5C

square

#42579F #9F4286 #9F8A42 #429F5C

split-complementary

#42579F #9F5C42 #869F42

monochromatic

#1E2849 #303F74 #42579F #6176BD #8C9BCF

Accessibility & contrast

On white

6.78

#42579F on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.10

#42579F on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #42579F

6.78:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##42579F	#FFFFFF	#000000	##FFFFFF
##42579F	1.00	6.78	3.10	6.78
#FFFFFF	6.78	1.00	21.00	1.00
#000000	3.10	21.00	1.00	21.00
##FFFFFF	6.78	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#375FA2

Deuteranopia (green-blind)

#2A579D

Tritanopia (blue-blind)

#006773

Achromatopsia (no color)

#5B5B5B

Design tokens & code

CSS

--color: #42579f;
/* rgb */ color: rgb(66, 87, 159);
/* oklch */ color: oklch(47.7% 0.119 269.3);

Tailwind

colors: {
  custom: {
    50: '#7e86bc',
    500: '#42579f',
    950: '#000000',
  },
}

SCSS

$custom: #42579f;
$custom-light: #7e86bc;
$custom-dark: #000000;

JSON

{
  "hex": "#42579f",
  "rgb": {
    "r": 66,
    "g": 87,
    "b": 159
  },
  "hsl": {
    "h": 226.452,
    "s": 41.333,
    "l": 44.118
  },
  "oklch": {
    "l": 0.47666,
    "c": 0.11866,
    "h": 269.3
  },
  "luminance": 0.10478
}

Semantic roles & 50–950 ramp

primary

#42579F

secondary

#BAAE82

accent

#B557D1

background

#F8F8FB

surface

#EFEFF6

border

#CACAD0

text

#0A0B12

muted

#7C7C81

Preview Lab

Preview with #42579F

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

Preview Lab → · Contrast checker → · Palette generator →