#3F429C#3F429C

#3F429C is a dark, vivid blue. Relative luminance 0.074; OKLCH L 43.0% C 0.144 H 277.1°. Best body text is #FFFFFF at 8.50:1 contrast (WCAG AA passes).

Color values

HEX	#3F429C
RGB	rgb(63, 66, 156)
HSL	hsl(238, 42%, 43%)
HSV	hsv(238, 60%, 61%)
CMYK	cmyk(59.6%, 57.7%, 0%, 38.8%)
CIE-LAB	lab(32.60, 26.55, -49.65)
CIE-LCH	lch(32.60, 56.30, 298.13°)
OKLab	oklab(42.95% 0.0176 -0.1425)
OKLCH	oklch(42.95% 0.144 277.1)
XYZ	xyz(9.9969, 7.3528, 32.3385)
Luminance	0.0735 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F429C #9C993F

analogous

#3F709C #3F429C #6B3F9C

triadic

#3F429C #9C3F42 #429C3F

tetradic

#3F429C #9C3F70 #9C993F #3F9C6B

square

#3F429C #9C3F70 #9C993F #3F9C6B

split-complementary

#3F429C #9C6B3F #709C3F

monochromatic

#1C1D45 #2D3070 #3F429C #5B5EBD #8789CE

Accessibility & contrast

On white

8.50

#3F429C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.47

#3F429C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F429C

8.50:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F429C	#FFFFFF	#000000	##FFFFFF
##3F429C	1.00	8.50	2.47	8.50
#FFFFFF	8.50	1.00	21.00	1.00
#000000	2.47	21.00	1.00	21.00
##FFFFFF	8.50	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00519F

Deuteranopia (green-blind)

#00499A

Tritanopia (blue-blind)

#005768

Achromatopsia (no color)

#4D4D4D

Design tokens & code

CSS

--color: #3f429c;
/* rgb */ color: rgb(63, 66, 156);
/* oklch */ color: oklch(43.0% 0.144 277.1);

Tailwind

colors: {
  custom: {
    50: '#7d76ba',
    500: '#3f429c',
    950: '#000000',
  },
}

SCSS

$custom: #3f429c;
$custom-light: #7d76ba;
$custom-dark: #000000;

JSON

{
  "hex": "#3f429c",
  "rgb": {
    "r": 63,
    "g": 66,
    "b": 156
  },
  "hsl": {
    "h": 238.065,
    "s": 42.466,
    "l": 42.941
  },
  "oklch": {
    "l": 0.42953,
    "c": 0.14356,
    "h": 277.1
  },
  "luminance": 0.07353
}

Semantic roles & 50–950 ramp

primary

#3F429C

secondary

#B9B77E

accent

#CE56D2

background

#F8F7FB

surface

#EFEDF6

border

#CAC8D0

text

#0A0812

muted

#7C7B81

Preview Lab

Preview with #3F429C

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

Preview Lab → · Contrast checker → · Palette generator →