#3F39BD#3F39BD

#3F39BD is a dark, vivid blue. Relative luminance 0.077; OKLCH L 44.3% C 0.198 H 276.6°. Best body text is #FFFFFF at 8.30:1 contrast (WCAG AA passes).

Color values

HEX	#3F39BD
RGB	rgb(63, 57, 189)
HSL	hsl(243, 54%, 48%)
HSV	hsv(243, 70%, 74%)
CMYK	cmyk(66.7%, 69.8%, 0%, 25.9%)
CIE-LAB	lab(33.26, 43.28, -68.28)
CIE-LCH	lch(33.26, 80.84, 302.37°)
OKLab	oklab(44.29% 0.0227 -0.1972)
OKLCH	oklch(44.29% 0.198 276.6)
XYZ	xyz(12.6953, 7.6560, 48.9430)
Luminance	0.0766 (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

#3F39BD #B7BD39

analogous

#3975BD #3F39BD #8139BD

triadic

#3F39BD #BD3F39 #39BD3F

tetradic

#3F39BD #BD3975 #B7BD39 #39BD81

square

#3F39BD #BD3975 #B7BD39 #39BD81

split-complementary

#3F39BD #BD8139 #75BD39

monochromatic

#201D5F #2F2B8E #3F39BD #6863D0 #9692DE

Accessibility & contrast

On white

8.30

#3F39BD on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.53

#3F39BD on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F39BD

8.30:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F39BD	#FFFFFF	#000000	##FFFFFF
##3F39BD	1.00	8.30	2.53	8.30
#FFFFFF	8.30	1.00	21.00	1.00
#000000	2.53	21.00	1.00	21.00
##FFFFFF	8.30	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0054C1

Deuteranopia (green-blind)

#0048BB

Tritanopia (blue-blind)

#005D77

Achromatopsia (no color)

#4E4E4E

Design tokens & code

CSS

--color: #3f39bd;
/* rgb */ color: rgb(63, 57, 189);
/* oklch */ color: oklch(44.3% 0.198 276.6);

Tailwind

colors: {
  custom: {
    50: '#8471d2',
    500: '#3f39bd',
    950: '#000000',
  },
}

SCSS

$custom: #3f39bd;
$custom-light: #8471d2;
$custom-dark: #000000;

JSON

{
  "hex": "#3f39bd",
  "rgb": {
    "r": 63,
    "g": 57,
    "b": 189
  },
  "hsl": {
    "h": 242.727,
    "s": 53.659,
    "l": 48.235
  },
  "oklch": {
    "l": 0.44293,
    "c": 0.19849,
    "h": 276.6
  },
  "luminance": 0.07657
}

Semantic roles & 50–950 ramp

primary

#3F39BD

secondary

#C6C989

accent

#DD4BD6

background

#F8F6FD

surface

#F0ECFA

border

#CBC7D3

text

#0C0814

muted

#7D7B83

Preview Lab

Preview with #3F39BD

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

Preview Lab → · Contrast checker → · Palette generator →