#42458C#42458C

#42458C is a dark, moderate blue. Relative luminance 0.073; OKLCH L 42.6% C 0.115 H 278.5°. Best body text is #FFFFFF at 8.53:1 contrast (WCAG AA passes).

Color values

HEX	#42458C
RGB	rgb(66, 69, 140)
HSL	hsl(238, 36%, 40%)
HSV	hsv(238, 53%, 55%)
CMYK	cmyk(52.9%, 50.7%, 0%, 45.1%)
CIE-LAB	lab(32.50, 19.76, -40.04)
CIE-LCH	lch(32.50, 44.65, 296.26°)
OKLab	oklab(42.58% 0.017 -0.1141)
OKLCH	oklch(42.58% 0.115 278.5)
XYZ	xyz(9.1070, 7.3074, 25.7364)
Luminance	0.0731 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#42458C #8C8942

analogous

#426A8C #42458C #64428C

triadic

#42458C #8C4245 #458C42

tetradic

#42458C #8C426A #8C8942 #428C64

square

#42458C #8C426A #8C8942 #428C64

split-complementary

#42458C #8C6442 #6A8C42

monochromatic

#1B1C39 #2E3162 #42458C #5A5EB1 #8486C5

Accessibility & contrast

On white

8.53

#42458C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.46

#42458C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #42458C

8.53:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##42458C	#FFFFFF	#000000	##FFFFFF
##42458C	1.00	8.53	2.46	8.53
#FFFFFF	8.53	1.00	21.00	1.00
#000000	2.46	21.00	1.00	21.00
##FFFFFF	8.53	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#234F8F

Deuteranopia (green-blind)

#1C4A8A

Tritanopia (blue-blind)

#235562

Achromatopsia (no color)

#4C4C4C

Design tokens & code

CSS

--color: #42458c;
/* rgb */ color: rgb(66, 69, 140);
/* oklch */ color: oklch(42.6% 0.115 278.5);

Tailwind

colors: {
  custom: {
    50: '#7c78ae',
    500: '#42458c',
    950: '#000000',
  },
}

SCSS

$custom: #42458c;
$custom-light: #7c78ae;
$custom-dark: #000000;

JSON

{
  "hex": "#42458c",
  "rgb": {
    "r": 66,
    "g": 69,
    "b": 140
  },
  "hsl": {
    "h": 237.568,
    "s": 35.922,
    "l": 40.392
  },
  "oklch": {
    "l": 0.42579,
    "c": 0.11537,
    "h": 278.5
  },
  "luminance": 0.07308
}

Semantic roles & 50–950 ramp

primary

#42458C

secondary

#B0AD7A

accent

#C75CCC

background

#F7F7FA

surface

#EEEDF4

border

#C9C8CE

text

#0A0910

muted

#7C7B7F

Preview Lab

Preview with #42458C

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

Preview Lab → · Contrast checker → · Palette generator →