#3F429F#3F429F

#3F429F is a dark, vivid blue. Relative luminance 0.075; OKLCH L 43.2% C 0.148 H 276.9°. Best body text is #FFFFFF at 8.43:1 contrast (WCAG AA passes).

Color values

HEX	#3F429F
RGB	rgb(63, 66, 159)
HSL	hsl(238, 43%, 44%)
HSV	hsv(238, 60%, 62%)
CMYK	cmyk(60.4%, 58.5%, 0%, 37.6%)
CIE-LAB	lab(32.82, 27.58, -51.10)
CIE-LCH	lch(32.82, 58.07, 298.36°)
OKLab	oklab(43.19% 0.0177 -0.1467)
OKLCH	oklch(43.19% 0.148 276.9)
XYZ	xyz(10.2541, 7.4556, 33.6929)
Luminance	0.0746 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F429F #9F9C3F

analogous

#3F729F #3F429F #6C3F9F

triadic

#3F429F #9F3F42 #429F3F

tetradic

#3F429F #9F3F72 #9F9C3F #3F9F6C

square

#3F429F #9F3F72 #9F9C3F #3F9F6C

split-complementary

#3F429F #9F6C3F #729F3F

monochromatic

#1C1E47 #2E3073 #3F429F #5D60BF #888BD0

Accessibility & contrast

On white

8.43

#3F429F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.49

#3F429F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F429F

8.43:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F429F	#FFFFFF	#000000	##FFFFFF
##3F429F	1.00	8.43	2.49	8.43
#FFFFFF	8.43	1.00	21.00	1.00
#000000	2.49	21.00	1.00	21.00
##FFFFFF	8.43	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0051A2

Deuteranopia (green-blind)

#00499D

Tritanopia (blue-blind)

#00586A

Achromatopsia (no color)

#4D4D4D

Design tokens & code

CSS

--color: #3f429f;
/* rgb */ color: rgb(63, 66, 159);
/* oklch */ color: oklch(43.2% 0.148 276.9);

Tailwind

colors: {
  custom: {
    50: '#7e76bc',
    500: '#3f429f',
    950: '#000000',
  },
}

SCSS

$custom: #3f429f;
$custom-light: #7e76bc;
$custom-dark: #000000;

JSON

{
  "hex": "#3f429f",
  "rgb": {
    "r": 63,
    "g": 66,
    "b": 159
  },
  "hsl": {
    "h": 238.125,
    "s": 43.243,
    "l": 43.529
  },
  "oklch": {
    "l": 0.43192,
    "c": 0.14779,
    "h": 276.9
  },
  "luminance": 0.07456
}

Semantic roles & 50–950 ramp

primary

#3F429F

secondary

#BBB97F

accent

#CF55D3

background

#F8F7FB

surface

#EFEDF6

border

#CAC8D0

text

#0B0812

muted

#7C7B81

Preview Lab

Preview with #3F429F

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

Preview Lab → · Contrast checker → · Palette generator →