#42579A#42579A

#42579A is a mid, moderate blue. Relative luminance 0.103; OKLCH L 47.3% C 0.111 H 268.8°. Best body text is #FFFFFF at 6.86:1 contrast (WCAG AA passes).

Color values

HEX	#42579A
RGB	rgb(66, 87, 154)
HSL	hsl(226, 40%, 43%)
HSV	hsv(226, 57%, 60%)
CMYK	cmyk(57.1%, 43.5%, 0%, 39.6%)
CIE-LAB	lab(38.39, 12.77, -39.13)
CIE-LCH	lch(38.39, 41.16, 288.07°)
OKLab	oklab(47.34% -0.0024 -0.1112)
OKLCH	oklch(47.34% 0.111 268.8)
XYZ	xyz(11.4858, 10.3069, 31.9498)
Luminance	0.1031 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#42579A #9A8542

analogous

#42839A #42579A #59429A

triadic

#42579A #9A4257 #579A42

tetradic

#42579A #9A4283 #9A8542 #429A59

square

#42579A #9A4283 #9A8542 #429A59

split-complementary

#42579A #9A5942 #839A42

monochromatic

#1D2744 #303F6F #42579A #5F75BA #8A9ACD

Accessibility & contrast

On white

6.86

#42579A on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.06

#42579A on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #42579A

6.86:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##42579A	#FFFFFF	#000000	##FFFFFF
##42579A	1.00	6.86	3.06	6.86
#FFFFFF	6.86	1.00	21.00	1.00
#000000	3.06	21.00	1.00	21.00
##FFFFFF	6.86	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3A5F9D

Deuteranopia (green-blind)

#2F5799

Tritanopia (blue-blind)

#0B6671

Achromatopsia (no color)

#5A5A5A

Design tokens & code

CSS

--color: #42579a;
/* rgb */ color: rgb(66, 87, 154);
/* oklch */ color: oklch(47.3% 0.111 268.8);

Tailwind

colors: {
  custom: {
    50: '#7d86b8',
    500: '#42579a',
    950: '#000000',
  },
}

SCSS

$custom: #42579a;
$custom-light: #7d86b8;
$custom-dark: #000000;

JSON

{
  "hex": "#42579a",
  "rgb": {
    "r": 66,
    "g": 87,
    "b": 154
  },
  "hsl": {
    "h": 225.682,
    "s": 40,
    "l": 43.137
  },
  "oklch": {
    "l": 0.47342,
    "c": 0.11128,
    "h": 268.8
  },
  "luminance": 0.10308
}

Semantic roles & 50–950 ramp

primary

#42579A

secondary

#B8AA80

accent

#B358D0

background

#F7F8FB

surface

#EEEFF6

border

#C9CAD0

text

#0A0B11

muted

#7C7C80

Preview Lab

Preview with #42579A

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

Preview Lab → · Contrast checker → · Palette generator →