#42458B#42458B

#42458B is a dark, moderate blue. Relative luminance 0.073; OKLCH L 42.5% C 0.114 H 278.5°. Best body text is #FFFFFF at 8.55:1 contrast (WCAG AA passes).

Color values

HEX	#42458B
RGB	rgb(66, 69, 139)
HSL	hsl(238, 36%, 40%)
HSV	hsv(238, 53%, 55%)
CMYK	cmyk(52.5%, 50.4%, 0%, 45.5%)
CIE-LAB	lab(32.43, 19.42, -39.53)
CIE-LCH	lch(32.43, 44.05, 296.16°)
OKLab	oklab(42.51% 0.0169 -0.1126)
OKLCH	oklch(42.51% 0.114 278.5)
XYZ	xyz(9.0336, 7.2780, 25.3499)
Luminance	0.0728 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#42458B #8B8842

analogous

#426A8B #42458B #63428B

triadic

#42458B #8B4245 #458B42

tetradic

#42458B #8B426A #8B8842 #428B63

square

#42458B #8B426A #8B8842 #428B63

split-complementary

#42458B #8B6342 #6A8B42

monochromatic

#1B1C38 #2E3062 #42458B #5A5DB1 #8386C4

Accessibility & contrast

On white

8.55

#42458B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.46

#42458B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #42458B

8.55:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##42458B	#FFFFFF	#000000	##FFFFFF
##42458B	1.00	8.55	2.46	8.55
#FFFFFF	8.55	1.00	21.00	1.00
#000000	2.46	21.00	1.00	21.00
##FFFFFF	8.55	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#244F8E

Deuteranopia (green-blind)

#1D4989

Tritanopia (blue-blind)

#245461

Achromatopsia (no color)

#4C4C4C

Design tokens & code

CSS

--color: #42458b;
/* rgb */ color: rgb(66, 69, 139);
/* oklch */ color: oklch(42.5% 0.114 278.5);

Tailwind

colors: {
  custom: {
    50: '#7c78ad',
    500: '#42458b',
    950: '#000000',
  },
}

SCSS

$custom: #42458b;
$custom-light: #7c78ad;
$custom-dark: #000000;

JSON

{
  "hex": "#42458b",
  "rgb": {
    "r": 66,
    "g": 69,
    "b": 139
  },
  "hsl": {
    "h": 237.534,
    "s": 35.61,
    "l": 40.196
  },
  "oklch": {
    "l": 0.42509,
    "c": 0.11387,
    "h": 278.5
  },
  "luminance": 0.07279
}

Semantic roles & 50–950 ramp

primary

#42458B

secondary

#AFAD7A

accent

#C75CCC

background

#F7F7FA

surface

#EEEDF4

border

#C9C8CE

text

#0A0910

muted

#7C7B7F

Preview Lab

Preview with #42458B

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

Preview Lab → · Contrast checker → · Palette generator →