#3F409F#3F409F

#3F409F is a dark, vivid blue. Relative luminance 0.072; OKLCH L 42.8% C 0.150 H 277.5°. Best body text is #FFFFFF at 8.59:1 contrast (WCAG AA passes).

Color values

HEX	#3F409F
RGB	rgb(63, 64, 159)
HSL	hsl(239, 43%, 44%)
HSV	hsv(239, 60%, 62%)
CMYK	cmyk(60.4%, 59.7%, 0%, 37.6%)
CIE-LAB	lab(32.32, 28.88, -51.92)
CIE-LCH	lch(32.32, 59.41, 299.08°)
OKLab	oklab(42.82% 0.0196 -0.1492)
OKLCH	oklch(42.82% 0.15 277.5)
XYZ	xyz(10.1393, 7.2260, 33.6546)
Luminance	0.0723 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

#533CC6

ΔE00 6.74

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F409F #9F9E3F

analogous

#3F709F #3F409F #6E3F9F

triadic

#3F409F #9F3F40 #409F3F

tetradic

#3F409F #9F3F70 #9F9E3F #3F9F6E

square

#3F409F #9F3F70 #9F9E3F #3F9F6E

split-complementary

#3F409F #9F6E3F #709F3F

monochromatic

#1C1D47 #2E2E73 #3F409F #5D5EBF #8889D0

Accessibility & contrast

On white

8.59

#3F409F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.45

#3F409F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F409F

8.59:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F409F	#FFFFFF	#000000	##FFFFFF
##3F409F	1.00	8.59	2.45	8.59
#FFFFFF	8.59	1.00	21.00	1.00
#000000	2.45	21.00	1.00	21.00
##FFFFFF	8.59	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0050A2

Deuteranopia (green-blind)

#00489D

Tritanopia (blue-blind)

#005769

Achromatopsia (no color)

#4C4C4C

Design tokens & code

CSS

--color: #3f409f;
/* rgb */ color: rgb(63, 64, 159);
/* oklch */ color: oklch(42.8% 0.150 277.5);

Tailwind

colors: {
  custom: {
    50: '#7e75bc',
    500: '#3f409f',
    950: '#000000',
  },
}

SCSS

$custom: #3f409f;
$custom-light: #7e75bc;
$custom-dark: #000000;

JSON

{
  "hex": "#3f409f",
  "rgb": {
    "r": 63,
    "g": 64,
    "b": 159
  },
  "hsl": {
    "h": 239.375,
    "s": 43.243,
    "l": 43.529
  },
  "oklch": {
    "l": 0.42817,
    "c": 0.15046,
    "h": 277.5
  },
  "luminance": 0.07227
}

Semantic roles & 50–950 ramp

primary

#3F409F

secondary

#BBBA7F

accent

#D255D3

background

#F8F7FB

surface

#EFEDF6

border

#CAC8D0

text

#0B0812

muted

#7C7B81

Preview Lab

Preview with #3F409F

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

Preview Lab → · Contrast checker → · Palette generator →