#3F429E#3F429E

#3F429E is a dark, vivid blue. Relative luminance 0.074; OKLCH L 43.1% C 0.146 H 276.9°. Best body text is #FFFFFF at 8.45:1 contrast (WCAG AA passes).

Color values

HEX	#3F429E
RGB	rgb(63, 66, 158)
HSL	hsl(238, 43%, 43%)
HSV	hsv(238, 60%, 62%)
CMYK	cmyk(60.1%, 58.2%, 0%, 38%)
CIE-LAB	lab(32.75, 27.24, -50.62)
CIE-LCH	lch(32.75, 57.48, 298.29°)
OKLab	oklab(43.11% 0.0177 -0.1453)
OKLCH	oklch(43.11% 0.146 276.9)
XYZ	xyz(10.1677, 7.4211, 33.2377)
Luminance	0.0742 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F429E #9E9B3F

analogous

#3F719E #3F429E #6B3F9E

triadic

#3F429E #9E3F42 #429E3F

tetradic

#3F429E #9E3F71 #9E9B3F #3F9E6B

square

#3F429E #9E3F71 #9E9B3F #3F9E6B

split-complementary

#3F429E #9E6B3F #719E3F

monochromatic

#1C1D46 #2E3072 #3F429E #5C5FBE #888AD0

Accessibility & contrast

On white

8.45

#3F429E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.48

#3F429E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F429E

8.45:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F429E	#FFFFFF	#000000	##FFFFFF
##3F429E	1.00	8.45	2.48	8.45
#FFFFFF	8.45	1.00	21.00	1.00
#000000	2.48	21.00	1.00	21.00
##FFFFFF	8.45	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0051A1

Deuteranopia (green-blind)

#00499C

Tritanopia (blue-blind)

#005869

Achromatopsia (no color)

#4D4D4D

Design tokens & code

CSS

--color: #3f429e;
/* rgb */ color: rgb(63, 66, 158);
/* oklch */ color: oklch(43.1% 0.146 276.9);

Tailwind

colors: {
  custom: {
    50: '#7e76bb',
    500: '#3f429e',
    950: '#000000',
  },
}

SCSS

$custom: #3f429e;
$custom-light: #7e76bb;
$custom-dark: #000000;

JSON

{
  "hex": "#3f429e",
  "rgb": {
    "r": 63,
    "g": 66,
    "b": 158
  },
  "hsl": {
    "h": 238.105,
    "s": 42.986,
    "l": 43.333
  },
  "oklch": {
    "l": 0.43112,
    "c": 0.14639,
    "h": 276.9
  },
  "luminance": 0.07422
}

Semantic roles & 50–950 ramp

primary

#3F429E

secondary

#BAB87F

accent

#CF55D3

background

#F8F7FB

surface

#EFEDF6

border

#CAC8D0

text

#0B0812

muted

#7C7B81

Preview Lab

Preview with #3F429E

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

Preview Lab → · Contrast checker → · Palette generator →