#3F30AB#3F30AB

#3F30AB is a dark, vivid blue. Relative luminance 0.061; OKLCH L 41.2% C 0.186 H 280.0°. Best body text is #FFFFFF at 9.45:1 contrast (WCAG AA passes).

Color values

HEX	#3F30AB
RGB	rgb(63, 48, 171)
HSL	hsl(247, 56%, 43%)
HSV	hsv(247, 72%, 67%)
CMYK	cmyk(63.2%, 71.9%, 0%, 32.9%)
CIE-LAB	lab(29.69, 42.64, -63.44)
CIE-LCH	lch(29.69, 76.44, 303.90°)
OKLab	oklab(41.23% 0.0321 -0.183)
OKLCH	oklch(41.23% 0.186 280)
XYZ	xyz(10.4552, 6.1101, 39.1486)
Luminance	0.0611 (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

#3F30AB #9CAB30

analogous

#305EAB #3F30AB #7C30AB

triadic

#3F30AB #AB3F30 #30AB3F

tetradic

#3F30AB #AB305E #9CAB30 #30AB7C

square

#3F30AB #AB305E #9CAB30 #30AB7C

split-complementary

#3F30AB #AB7C30 #5EAB30

monochromatic

#1C154B #2D237B #3F30AB #5B4CCD #877BDA

Accessibility & contrast

On white

9.45

#3F30AB on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.22

#3F30AB on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F30AB

9.45:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F30AB	#FFFFFF	#000000	##FFFFFF
##3F30AB	1.00	9.45	2.22	9.45
#FFFFFF	9.45	1.00	21.00	1.00
#000000	2.22	21.00	1.00	21.00
##FFFFFF	9.45	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004AAF

Deuteranopia (green-blind)

#0041A9

Tritanopia (blue-blind)

#00526A

Achromatopsia (no color)

#464646

Design tokens & code

CSS

--color: #3f30ab;
/* rgb */ color: rgb(63, 48, 171);
/* oklch */ color: oklch(41.2% 0.186 280.0);

Tailwind

colors: {
  custom: {
    50: '#816ac5',
    500: '#3f30ab',
    950: '#000000',
  },
}

SCSS

$custom: #3f30ab;
$custom-light: #816ac5;
$custom-dark: #000000;

JSON

{
  "hex": "#3f30ab",
  "rgb": {
    "r": 63,
    "g": 48,
    "b": 171
  },
  "hsl": {
    "h": 247.317,
    "s": 56.164,
    "l": 42.941
  },
  "oklch": {
    "l": 0.41227,
    "c": 0.1858,
    "h": 280
  },
  "luminance": 0.06111
}

Semantic roles & 50–950 ramp

primary

#3F30AB

secondary

#B9C374

accent

#DF48CD

background

#F8F6FC

surface

#F0EBF8

border

#CBC6D1

text

#0C0613

muted

#7D7A82

Preview Lab

Preview with #3F30AB

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

Preview Lab → · Contrast checker → · Palette generator →