#42517D#42517D

#42517D is a dark, moderate blue. Relative luminance 0.085; OKLCH L 44.2% C 0.075 H 268.9°. Best body text is #FFFFFF at 7.76:1 contrast (WCAG AA passes).

Color values

HEX	#42517D
RGB	rgb(66, 81, 125)
HSL	hsl(225, 31%, 37%)
HSV	hsv(225, 47%, 49%)
CMYK	cmyk(47.2%, 35.2%, 0%, 51%)
CIE-LAB	lab(35.05, 6.92, -26.75)
CIE-LCH	lch(35.05, 27.63, 284.50°)
OKLab	oklab(44.25% -0.0015 -0.0752)
OKLCH	oklch(44.25% 0.075 268.9)
XYZ	xyz(8.8897, 8.5233, 20.5748)
Luminance	0.0852 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#42517D #7D6E42

analogous

#426E7D #42517D #51427D

triadic

#42517D #7D4251 #517D42

tetradic

#42517D #7D426E #7D6E42 #427D51

square

#42517D #7D426E #7D6E42 #427D51

split-complementary

#42517D #7D5142 #6E7D42

monochromatic

#181D2D #2D3755 #42517D #576BA5 #7E8EBB

Accessibility & contrast

On white

7.76

#42517D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.70

#42517D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #42517D

7.76:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##42517D	#FFFFFF	#000000	##FFFFFF
##42517D	1.00	7.76	2.70	7.76
#FFFFFF	7.76	1.00	21.00	1.00
#000000	2.70	21.00	1.00	21.00
##FFFFFF	7.76	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#41557F

Deuteranopia (green-blind)

#3B507C

Tritanopia (blue-blind)

#2C5A61

Achromatopsia (no color)

#525252

Design tokens & code

CSS

--color: #42517d;
/* rgb */ color: rgb(66, 81, 125);
/* oklch */ color: oklch(44.2% 0.075 268.9);

Tailwind

colors: {
  custom: {
    50: '#7a81a3',
    500: '#42517d',
    950: '#000000',
  },
}

SCSS

$custom: #42517d;
$custom-light: #7a81a3;
$custom-dark: #000000;

JSON

{
  "hex": "#42517d",
  "rgb": {
    "r": 66,
    "g": 81,
    "b": 125
  },
  "hsl": {
    "h": 224.746,
    "s": 30.89,
    "l": 37.451
  },
  "oklch": {
    "l": 0.44249,
    "c": 0.07517,
    "h": 268.9
  },
  "luminance": 0.08524
}

Semantic roles & 50–950 ramp

primary

#42517D

secondary

#A69975

accent

#AD61C7

background

#F7F7FA

surface

#EEEEF3

border

#C9C9CD

text

#090A0F

muted

#7B7C7F

Preview Lab

Preview with #42517D

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

Preview Lab → · Contrast checker → · Palette generator →