#3339B3#3339B3

#3339B3 is a dark, vivid blue. Relative luminance 0.069; OKLCH L 42.6% C 0.189 H 272.9°. Best body text is #FFFFFF at 8.83:1 contrast (WCAG AA passes).

Color values

HEX	#3339B3
RGB	rgb(51, 57, 179)
HSL	hsl(237, 56%, 45%)
HSV	hsv(237, 72%, 70%)
CMYK	cmyk(71.5%, 68.2%, 0%, 29.8%)
CIE-LAB	lab(31.54, 38.47, -65.21)
CIE-LCH	lch(31.54, 75.71, 300.54°)
OKLab	oklab(42.57% 0.0097 -0.1885)
OKLCH	oklch(42.57% 0.189 272.9)
XYZ	xyz(10.9623, 6.8837, 43.3900)
Luminance	0.0688 (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

#3339B3 #B3AD33

analogous

#3379B3 #3339B3 #6D33B3

triadic

#3339B3 #B33339 #39B333

tetradic

#3339B3 #B33379 #B3AD33 #33B36D

square

#3339B3 #B33379 #B3AD33 #33B36D

split-complementary

#3339B3 #B36D33 #79B333

monochromatic

#181B54 #252A83 #3339B3 #555ACE #8488DC

Accessibility & contrast

On white

8.83

#3339B3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.38

#3339B3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3339B3

8.83:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3339B3	#FFFFFF	#000000	##FFFFFF
##3339B3	1.00	8.83	2.38	8.83
#FFFFFF	8.83	1.00	21.00	1.00
#000000	2.38	21.00	1.00	21.00
##FFFFFF	8.83	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0050B7

Deuteranopia (green-blind)

#0044B1

Tritanopia (blue-blind)

#005A71

Achromatopsia (no color)

#4A4A4A

Design tokens & code

CSS

--color: #3339b3;
/* rgb */ color: rgb(51, 57, 179);
/* oklch */ color: oklch(42.6% 0.189 272.9);

Tailwind

colors: {
  custom: {
    50: '#7d70cb',
    500: '#3339b3',
    950: '#000000',
  },
}

SCSS

$custom: #3339b3;
$custom-light: #7d70cb;
$custom-dark: #000000;

JSON

{
  "hex": "#3339b3",
  "rgb": {
    "r": 51,
    "g": 57,
    "b": 179
  },
  "hsl": {
    "h": 237.188,
    "s": 55.652,
    "l": 45.098
  },
  "oklch": {
    "l": 0.42568,
    "c": 0.18876,
    "h": 272.9
  },
  "luminance": 0.06885
}

Semantic roles & 50–950 ramp

primary

#3339B3

secondary

#C6C27C

accent

#D849DF

background

#F8F6FC

surface

#EFECF9

border

#CAC7D2

text

#0B0713

muted

#7C7A82

Preview Lab

Preview with #3339B3

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

Preview Lab → · Contrast checker → · Palette generator →