#42589D#42589D

#42589D is a mid, moderate blue. Relative luminance 0.106; OKLCH L 47.8% C 0.114 H 268.5°. Best body text is #FFFFFF at 6.74:1 contrast (WCAG AA passes).

Color values

HEX	#42589D
RGB	rgb(66, 88, 157)
HSL	hsl(225, 41%, 44%)
HSV	hsv(225, 58%, 62%)
CMYK	cmyk(58%, 43.9%, 0%, 38.4%)
CIE-LAB	lab(38.85, 13.16, -40.19)
CIE-LCH	lch(38.85, 42.29, 288.13°)
OKLab	oklab(47.75% -0.003 -0.1144)
OKLCH	oklch(47.75% 0.114 268.5)
XYZ	xyz(11.8203, 10.5711, 33.3093)
Luminance	0.1057 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#42589D #9D8742

analogous

#42859D #42589D #59429D

triadic

#42589D #9D4258 #589D42

tetradic

#42589D #9D4285 #9D8742 #429D59

square

#42589D #9D4285 #9D8742 #429D59

split-complementary

#42589D #9D5942 #859D42

monochromatic

#1E2847 #304072 #42589D #6076BC #8B9BCE

Accessibility & contrast

On white

6.74

#42589D on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.11

#42589D on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #42589D

6.74:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##42589D	#FFFFFF	#000000	##FFFFFF
##42589D	1.00	6.74	3.11	6.74
#FFFFFF	6.74	1.00	21.00	1.00
#000000	3.11	21.00	1.00	21.00
##FFFFFF	6.74	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3A60A0

Deuteranopia (green-blind)

#2E589C

Tritanopia (blue-blind)

#026773

Achromatopsia (no color)

#5B5B5B

Design tokens & code

CSS

--color: #42589d;
/* rgb */ color: rgb(66, 88, 157);
/* oklch */ color: oklch(47.8% 0.114 268.5);

Tailwind

colors: {
  custom: {
    50: '#7e86ba',
    500: '#42589d',
    950: '#000000',
  },
}

SCSS

$custom: #42589d;
$custom-light: #7e86ba;
$custom-dark: #000000;

JSON

{
  "hex": "#42589d",
  "rgb": {
    "r": 66,
    "g": 88,
    "b": 157
  },
  "hsl": {
    "h": 225.495,
    "s": 40.807,
    "l": 43.725
  },
  "oklch": {
    "l": 0.47752,
    "c": 0.1144,
    "h": 268.5
  },
  "luminance": 0.10572
}

Semantic roles & 50–950 ramp

primary

#42589D

secondary

#B9AC82

accent

#B357D1

background

#F8F8FB

surface

#EFEFF6

border

#CACAD0

text

#0A0B12

muted

#7C7C81

Preview Lab

Preview with #42589D

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

Preview Lab → · Contrast checker → · Palette generator →