#3939BB#3939BB

#3939BB is a dark, vivid blue. Relative luminance 0.074; OKLCH L 43.7% C 0.197 H 274.5°. Best body text is #FFFFFF at 8.48:1 contrast (WCAG AA passes).

Color values

HEX	#3939BB
RGB	rgb(57, 57, 187)
HSL	hsl(240, 53%, 48%)
HSV	hsv(240, 70%, 73%)
CMYK	cmyk(69.5%, 69.5%, 0%, 26.7%)
CIE-LAB	lab(32.66, 41.89, -68.09)
CIE-LCH	lch(32.66, 79.95, 301.60°)
OKLab	oklab(43.7% 0.0157 -0.1968)
OKLCH	oklch(43.7% 0.197 274.5)
XYZ	xyz(12.1171, 7.3828, 47.7905)
Luminance	0.0738 (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

#3939BB #BBBB39

analogous

#397ABB #3939BB #7A39BB

triadic

#3939BB #BB3939 #39BB39

tetradic

#3939BB #BB397A #BBBB39 #39BB7A

square

#3939BB #BB397A #BBBB39 #39BB7A

split-complementary

#3939BB #BB7A39 #7ABB39

monochromatic

#1C1C5D #2B2B8C #3939BB #6262CF #9191DD

Accessibility & contrast

On white

8.48

#3939BB on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.48

#3939BB on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3939BB

8.48:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3939BB	#FFFFFF	#000000	##FFFFFF
##3939BB	1.00	8.48	2.48	8.48
#FFFFFF	8.48	1.00	21.00	1.00
#000000	2.48	21.00	1.00	21.00
##FFFFFF	8.48	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0053BF

Deuteranopia (green-blind)

#0047B9

Tritanopia (blue-blind)

#005C75

Achromatopsia (no color)

#4D4D4D

Design tokens & code

CSS

--color: #3939bb;
/* rgb */ color: rgb(57, 57, 187);
/* oklch */ color: oklch(43.7% 0.197 274.5);

Tailwind

colors: {
  custom: {
    50: '#8170d1',
    500: '#3939bb',
    950: '#000000',
  },
}

SCSS

$custom: #3939bb;
$custom-light: #8170d1;
$custom-dark: #000000;

JSON

{
  "hex": "#3939bb",
  "rgb": {
    "r": 57,
    "g": 57,
    "b": 187
  },
  "hsl": {
    "h": 240,
    "s": 53.279,
    "l": 47.843
  },
  "oklch": {
    "l": 0.43704,
    "c": 0.1974,
    "h": 274.5
  },
  "luminance": 0.07384
}

Semantic roles & 50–950 ramp

primary

#3939BB

secondary

#C8C887

accent

#DD4BDD

background

#F8F6FD

surface

#F0ECFA

border

#CBC7D3

text

#0C0714

muted

#7D7A83

Preview Lab

Preview with #3939BB

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

Preview Lab → · Contrast checker → · Palette generator →