#3F429D#3F429D

#3F429D is a dark, vivid blue. Relative luminance 0.074; OKLCH L 43.0% C 0.145 H 277.0°. Best body text is #FFFFFF at 8.48:1 contrast (WCAG AA passes).

Color values

HEX	#3F429D
RGB	rgb(63, 66, 157)
HSL	hsl(238, 43%, 43%)
HSV	hsv(238, 60%, 62%)
CMYK	cmyk(59.9%, 58%, 0%, 38.4%)
CIE-LAB	lab(32.67, 26.89, -50.14)
CIE-LCH	lch(32.67, 56.89, 298.21°)
OKLab	oklab(43.03% 0.0176 -0.1439)
OKLCH	oklch(43.03% 0.145 277)
XYZ	xyz(10.0820, 7.3868, 32.7863)
Luminance	0.0739 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F429D #9D9A3F

analogous

#3F719D #3F429D #6B3F9D

triadic

#3F429D #9D3F42 #429D3F

tetradic

#3F429D #9D3F71 #9D9A3F #3F9D6B

square

#3F429D #9D3F71 #9D9A3F #3F9D6B

split-complementary

#3F429D #9D6B3F #719D3F

monochromatic

#1C1D46 #2D3071 #3F429D #5C5FBD #878ACF

Accessibility & contrast

On white

8.48

#3F429D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.48

#3F429D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F429D

8.48:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F429D	#FFFFFF	#000000	##FFFFFF
##3F429D	1.00	8.48	2.48	8.48
#FFFFFF	8.48	1.00	21.00	1.00
#000000	2.48	21.00	1.00	21.00
##FFFFFF	8.48	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0051A0

Deuteranopia (green-blind)

#00499B

Tritanopia (blue-blind)

#005869

Achromatopsia (no color)

#4D4D4D

Design tokens & code

CSS

--color: #3f429d;
/* rgb */ color: rgb(63, 66, 157);
/* oklch */ color: oklch(43.0% 0.145 277.0);

Tailwind

colors: {
  custom: {
    50: '#7d76bb',
    500: '#3f429d',
    950: '#000000',
  },
}

SCSS

$custom: #3f429d;
$custom-light: #7d76bb;
$custom-dark: #000000;

JSON

{
  "hex": "#3f429d",
  "rgb": {
    "r": 63,
    "g": 66,
    "b": 157
  },
  "hsl": {
    "h": 238.085,
    "s": 42.727,
    "l": 43.137
  },
  "oklch": {
    "l": 0.43033,
    "c": 0.14498,
    "h": 277
  },
  "luminance": 0.07388
}

Semantic roles & 50–950 ramp

primary

#3F429D

secondary

#BAB87E

accent

#CF55D3

background

#F8F7FB

surface

#EFEDF6

border

#CAC8D0

text

#0B0812

muted

#7C7B81

Preview Lab

Preview with #3F429D

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

Preview Lab → · Contrast checker → · Palette generator →