#3F399B#3F399B

#3F399B is a dark, vivid blue. Relative luminance 0.064; OKLCH L 41.2% C 0.154 H 279.9°. Best body text is #FFFFFF at 9.25:1 contrast (WCAG AA passes).

Color values

HEX	#3F399B
RGB	rgb(63, 57, 155)
HSL	hsl(244, 46%, 42%)
HSV	hsv(244, 63%, 61%)
CMYK	cmyk(59.4%, 63.2%, 0%, 39.2%)
CIE-LAB	lab(30.28, 31.98, -52.81)
CIE-LCH	lch(30.28, 61.74, 301.20°)
OKLab	oklab(41.22% 0.0266 -0.1518)
OKLCH	oklch(41.22% 0.154 279.9)
XYZ	xyz(9.4276, 6.3489, 31.7327)
Luminance	0.0635 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F399B #959B39

analogous

#39649B #3F399B #70399B

triadic

#3F399B #9B3F39 #399B3F

tetradic

#3F399B #9B3964 #959B39 #399B70

square

#3F399B #9B3964 #959B39 #399B70

split-complementary

#3F399B #9B7039 #649B39

monochromatic

#1B1842 #2D296E #3F399B #5952BF #847FD0

Accessibility & contrast

On white

9.25

#3F399B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.27

#3F399B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F399B

9.25:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F399B	#FFFFFF	#000000	##FFFFFF
##3F399B	1.00	9.25	2.27	9.25
#FFFFFF	9.25	1.00	21.00	1.00
#000000	2.27	21.00	1.00	21.00
##FFFFFF	9.25	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004B9E

Deuteranopia (green-blind)

#004499

Tritanopia (blue-blind)

#025164

Achromatopsia (no color)

#474747

Design tokens & code

CSS

--color: #3f399b;
/* rgb */ color: rgb(63, 57, 155);
/* oklch */ color: oklch(41.2% 0.154 279.9);

Tailwind

colors: {
  custom: {
    50: '#7e70b9',
    500: '#3f399b',
    950: '#000000',
  },
}

SCSS

$custom: #3f399b;
$custom-light: #7e70b9;
$custom-dark: #000000;

JSON

{
  "hex": "#3f399b",
  "rgb": {
    "r": 63,
    "g": 57,
    "b": 155
  },
  "hsl": {
    "h": 243.673,
    "s": 46.226,
    "l": 41.569
  },
  "oklch": {
    "l": 0.41217,
    "c": 0.15416,
    "h": 279.9
  },
  "luminance": 0.0635
}

Semantic roles & 50–950 ramp

primary

#3F399B

secondary

#B5B977

accent

#D652CE

background

#F8F6FB

surface

#EFECF6

border

#CAC7D0

text

#0B0712

muted

#7C7A81

Preview Lab

Preview with #3F399B

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

Preview Lab → · Contrast checker → · Palette generator →