#3939B0#3939B0

#3939B0 is a dark, vivid blue. Relative luminance 0.069; OKLCH L 42.7% C 0.183 H 275.3°. Best body text is #FFFFFF at 8.80:1 contrast (WCAG AA passes).

Color values

HEX	#3939B0
RGB	rgb(57, 57, 176)
HSL	hsl(240, 51%, 46%)
HSV	hsv(240, 68%, 69%)
CMYK	cmyk(67.6%, 67.6%, 0%, 31%)
CIE-LAB	lab(31.65, 38.17, -63.24)
CIE-LCH	lch(31.65, 73.87, 301.12°)
OKLab	oklab(42.66% 0.0171 -0.1826)
OKLCH	oklch(42.66% 0.183 275.3)
XYZ	xyz(10.9844, 6.9297, 41.8246)
Luminance	0.0693 (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

#3939B0 #B0B039

analogous

#3974B0 #3939B0 #7439B0

triadic

#3939B0 #B03939 #39B039

tetradic

#3939B0 #B03974 #B0B039 #39B074

square

#3939B0 #B03974 #B0B039 #39B074

split-complementary

#3939B0 #B07439 #74B039

monochromatic

#1B1B54 #2A2A82 #3939B0 #5C5CCA #8A8AD9

Accessibility & contrast

On white

8.80

#3939B0 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.39

#3939B0 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3939B0

8.80:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3939B0	#FFFFFF	#000000	##FFFFFF
##3939B0	1.00	8.80	2.39	8.80
#FFFFFF	8.80	1.00	21.00	1.00
#000000	2.39	21.00	1.00	21.00
##FFFFFF	8.80	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0050B4

Deuteranopia (green-blind)

#0045AE

Tritanopia (blue-blind)

#00596F

Achromatopsia (no color)

#4A4A4A

Design tokens & code

CSS

--color: #3939b0;
/* rgb */ color: rgb(57, 57, 176);
/* oklch */ color: oklch(42.7% 0.183 275.3);

Tailwind

colors: {
  custom: {
    50: '#7f70c9',
    500: '#3939b0',
    950: '#000000',
  },
}

SCSS

$custom: #3939b0;
$custom-light: #7f70c9;
$custom-dark: #000000;

JSON

{
  "hex": "#3939b0",
  "rgb": {
    "r": 57,
    "g": 57,
    "b": 176
  },
  "hsl": {
    "h": 240,
    "s": 51.073,
    "l": 45.686
  },
  "oklch": {
    "l": 0.42661,
    "c": 0.18337,
    "h": 275.3
  },
  "luminance": 0.06931
}

Semantic roles & 50–950 ramp

primary

#3939B0

secondary

#C4C481

accent

#DB4DDB

background

#F8F6FC

surface

#EFECF8

border

#CAC7D1

text

#0B0713

muted

#7C7A82

Preview Lab

Preview with #3939B0

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

Preview Lab → · Contrast checker → · Palette generator →