#3939B5#3939B5

#3939B5 is a dark, vivid blue. Relative luminance 0.071; OKLCH L 43.1% C 0.190 H 275.0°. Best body text is #FFFFFF at 8.65:1 contrast (WCAG AA passes).

Color values

HEX	#3939B5
RGB	rgb(57, 57, 181)
HSL	hsl(240, 52%, 47%)
HSV	hsv(240, 69%, 71%)
CMYK	cmyk(68.5%, 68.5%, 0%, 29%)
CIE-LAB	lab(32.10, 39.87, -65.46)
CIE-LCH	lch(32.10, 76.65, 301.35°)
OKLab	oklab(43.13% 0.0164 -0.1891)
OKLCH	oklch(43.13% 0.19 275)
XYZ	xyz(11.4882, 7.1313, 44.4781)
Luminance	0.0713 (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

#3939B5 #B5B539

analogous

#3977B5 #3939B5 #7739B5

triadic

#3939B5 #B53939 #39B539

tetradic

#3939B5 #B53977 #B5B539 #39B577

square

#3939B5 #B53977 #B5B539 #39B577

split-complementary

#3939B5 #B57739 #77B539

monochromatic

#1C1C58 #2A2A86 #3939B5 #5F5FCD #8D8DDB

Accessibility & contrast

On white

8.65

#3939B5 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.43

#3939B5 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3939B5

8.65:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3939B5	#FFFFFF	#000000	##FFFFFF
##3939B5	1.00	8.65	2.43	8.65
#FFFFFF	8.65	1.00	21.00	1.00
#000000	2.43	21.00	1.00	21.00
##FFFFFF	8.65	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0051B9

Deuteranopia (green-blind)

#0046B3

Tritanopia (blue-blind)

#005A72

Achromatopsia (no color)

#4C4C4C

Design tokens & code

CSS

--color: #3939b5;
/* rgb */ color: rgb(57, 57, 181);
/* oklch */ color: oklch(43.1% 0.190 275.0);

Tailwind

colors: {
  custom: {
    50: '#8070cc',
    500: '#3939b5',
    950: '#000000',
  },
}

SCSS

$custom: #3939b5;
$custom-light: #8070cc;
$custom-dark: #000000;

JSON

{
  "hex": "#3939b5",
  "rgb": {
    "r": 57,
    "g": 57,
    "b": 181
  },
  "hsl": {
    "h": 240,
    "s": 52.101,
    "l": 46.667
  },
  "oklch": {
    "l": 0.43131,
    "c": 0.18979,
    "h": 275
  },
  "luminance": 0.07132
}

Semantic roles & 50–950 ramp

primary

#3939B5

secondary

#C6C684

accent

#DC4CDC

background

#F8F6FC

surface

#F0ECF9

border

#CBC7D2

text

#0C0714

muted

#7D7A82

Preview Lab

Preview with #3939B5

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

Preview Lab → · Contrast checker → · Palette generator →