#3F409E#3F409E

#3F409E is a dark, vivid blue. Relative luminance 0.072; OKLCH L 42.7% C 0.149 H 277.6°. Best body text is #FFFFFF at 8.61:1 contrast (WCAG AA passes).

Color values

HEX	#3F409E
RGB	rgb(63, 64, 158)
HSL	hsl(239, 43%, 43%)
HSV	hsv(239, 60%, 62%)
CMYK	cmyk(60.1%, 59.5%, 0%, 38%)
CIE-LAB	lab(32.24, 28.53, -51.44)
CIE-LCH	lch(32.24, 58.83, 299.01°)
OKLab	oklab(42.74% 0.0197 -0.1478)
OKLCH	oklch(42.74% 0.149 277.6)
XYZ	xyz(10.0529, 7.1914, 33.1995)
Luminance	0.0719 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F409E #9E9D3F

analogous

#3F6F9E #3F409E #6D3F9E

triadic

#3F409E #9E3F40 #409E3F

tetradic

#3F409E #9E3F6F #9E9D3F #3F9E6D

square

#3F409E #9E3F6F #9E9D3F #3F9E6D

split-complementary

#3F409E #9E6D3F #6F9E3F

monochromatic

#1C1D46 #2E2E72 #3F409E #5C5DBE #8889D0

Accessibility & contrast

On white

8.61

#3F409E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.44

#3F409E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F409E

8.61:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F409E	#FFFFFF	#000000	##FFFFFF
##3F409E	1.00	8.61	2.44	8.61
#FFFFFF	8.61	1.00	21.00	1.00
#000000	2.44	21.00	1.00	21.00
##FFFFFF	8.61	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0050A1

Deuteranopia (green-blind)

#00489C

Tritanopia (blue-blind)

#005768

Achromatopsia (no color)

#4C4C4C

Design tokens & code

CSS

--color: #3f409e;
/* rgb */ color: rgb(63, 64, 158);
/* oklch */ color: oklch(42.7% 0.149 277.6);

Tailwind

colors: {
  custom: {
    50: '#7e75bb',
    500: '#3f409e',
    950: '#000000',
  },
}

SCSS

$custom: #3f409e;
$custom-light: #7e75bb;
$custom-dark: #000000;

JSON

{
  "hex": "#3f409e",
  "rgb": {
    "r": 63,
    "g": 64,
    "b": 158
  },
  "hsl": {
    "h": 239.368,
    "s": 42.986,
    "l": 43.333
  },
  "oklch": {
    "l": 0.42736,
    "c": 0.14906,
    "h": 277.6
  },
  "luminance": 0.07192
}

Semantic roles & 50–950 ramp

primary

#3F409E

secondary

#BAB97F

accent

#D155D3

background

#F8F7FB

surface

#EFEDF6

border

#CAC8D0

text

#0B0812

muted

#7C7B81

Preview Lab

Preview with #3F409E

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

Preview Lab → · Contrast checker → · Palette generator →