#3939B8#3939B8

#3939B8 is a dark, vivid blue. Relative luminance 0.073; OKLCH L 43.4% C 0.194 H 274.8°. Best body text is #FFFFFF at 8.57:1 contrast (WCAG AA passes).

Color values

HEX	#3939B8
RGB	rgb(57, 57, 184)
HSL	hsl(240, 53%, 47%)
HSV	hsv(240, 69%, 72%)
CMYK	cmyk(69%, 69%, 0%, 27.8%)
CIE-LAB	lab(32.38, 40.88, -66.78)
CIE-LCH	lch(32.38, 78.30, 301.48°)
OKLab	oklab(43.42% 0.016 -0.1929)
OKLCH	oklch(43.42% 0.194 274.8)
XYZ	xyz(11.7993, 7.2557, 46.1168)
Luminance	0.0726 (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

#3939B8 #B8B839

analogous

#3979B8 #3939B8 #7939B8

triadic

#3939B8 #B83939 #39B839

tetradic

#3939B8 #B83979 #B8B839 #39B879

square

#3939B8 #B83979 #B8B839 #39B879

split-complementary

#3939B8 #B87939 #79B839

monochromatic

#1C1C5B #2B2B89 #3939B8 #6060CE #8F8FDC

Accessibility & contrast

On white

8.57

#3939B8 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.45

#3939B8 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3939B8

8.57:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3939B8	#FFFFFF	#000000	##FFFFFF
##3939B8	1.00	8.57	2.45	8.57
#FFFFFF	8.57	1.00	21.00	1.00
#000000	2.45	21.00	1.00	21.00
##FFFFFF	8.57	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0052BC

Deuteranopia (green-blind)

#0046B6

Tritanopia (blue-blind)

#005B74

Achromatopsia (no color)

#4C4C4C

Design tokens & code

CSS

--color: #3939b8;
/* rgb */ color: rgb(57, 57, 184);
/* oklch */ color: oklch(43.4% 0.194 274.8);

Tailwind

colors: {
  custom: {
    50: '#8170ce',
    500: '#3939b8',
    950: '#000000',
  },
}

SCSS

$custom: #3939b8;
$custom-light: #8170ce;
$custom-dark: #000000;

JSON

{
  "hex": "#3939b8",
  "rgb": {
    "r": 57,
    "g": 57,
    "b": 184
  },
  "hsl": {
    "h": 240,
    "s": 52.697,
    "l": 47.255
  },
  "oklch": {
    "l": 0.43417,
    "c": 0.19362,
    "h": 274.8
  },
  "luminance": 0.07257
}

Semantic roles & 50–950 ramp

primary

#3939B8

secondary

#C7C786

accent

#DC4CDC

background

#F8F6FC

surface

#F0ECF9

border

#CBC7D2

text

#0C0714

muted

#7D7A82

Preview Lab

Preview with #3939B8

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

Preview Lab → · Contrast checker → · Palette generator →