#3F309D#3F309D

#3F309D is a dark, vivid blue. Relative luminance 0.056; OKLCH L 39.9% C 0.168 H 281.9°. Best body text is #FFFFFF at 9.90:1 contrast (WCAG AA passes).

Color values

HEX	#3F309D
RGB	rgb(63, 48, 157)
HSL	hsl(248, 53%, 40%)
HSV	hsv(248, 69%, 62%)
CMYK	cmyk(59.9%, 69.4%, 0%, 38.4%)
CIE-LAB	lab(28.39, 38.15, -57.11)
CIE-LCH	lch(28.39, 68.68, 303.75°)
OKLab	oklab(39.9% 0.0346 -0.1645)
OKLCH	oklch(39.9% 0.168 281.9)
XYZ	xyz(9.1908, 5.6044, 32.4892)
Luminance	0.0561 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

#533CC6

ΔE00 7.02

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F309D #8E9D30

analogous

#30579D #3F309D #76309D

triadic

#3F309D #9D3F30 #309D3F

tetradic

#3F309D #9D3057 #8E9D30 #309D76

square

#3F309D #9D3057 #8E9D30 #309D76

split-complementary

#3F309D #9D7630 #579D30

monochromatic

#19133F #2C226E #3F309D #5644C6 #8173D4

Accessibility & contrast

On white

9.90

#3F309D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.12

#3F309D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F309D

9.90:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F309D	#FFFFFF	#000000	##FFFFFF
##3F309D	1.00	9.90	2.12	9.90
#FFFFFF	9.90	1.00	21.00	1.00
#000000	2.12	21.00	1.00	21.00
##FFFFFF	9.90	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0047A0

Deuteranopia (green-blind)

#003F9B

Tritanopia (blue-blind)

#004D62

Achromatopsia (no color)

#434343

Design tokens & code

CSS

--color: #3f309d;
/* rgb */ color: rgb(63, 48, 157);
/* oklch */ color: oklch(39.9% 0.168 281.9);

Tailwind

colors: {
  custom: {
    50: '#7f6abb',
    500: '#3f309d',
    950: '#000000',
  },
}

SCSS

$custom: #3f309d;
$custom-light: #7f6abb;
$custom-dark: #000000;

JSON

{
  "hex": "#3f309d",
  "rgb": {
    "r": 63,
    "g": 48,
    "b": 157
  },
  "hsl": {
    "h": 248.257,
    "s": 53.171,
    "l": 40.196
  },
  "oklch": {
    "l": 0.39903,
    "c": 0.16806,
    "h": 281.9
  },
  "luminance": 0.05605
}

Semantic roles & 50–950 ramp

primary

#3F309D

secondary

#B1BC6D

accent

#DD4BC9

background

#F8F6FB

surface

#EFEBF6

border

#CAC6D0

text

#0B0612

muted

#7C7A81

Preview Lab

Preview with #3F309D

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

Preview Lab → · Contrast checker → · Palette generator →