#3339B1#3339B1

#3339B1 is a dark, vivid blue. Relative luminance 0.068; OKLCH L 42.4% C 0.186 H 273.0°. Best body text is #FFFFFF at 8.90:1 contrast (WCAG AA passes).

Color values

HEX	#3339B1
RGB	rgb(51, 57, 177)
HSL	hsl(237, 55%, 45%)
HSV	hsv(237, 71%, 69%)
CMYK	cmyk(71.2%, 67.8%, 0%, 30.6%)
CIE-LAB	lab(31.35, 37.77, -64.33)
CIE-LCH	lch(31.35, 74.60, 300.42°)
OKLab	oklab(42.38% 0.0099 -0.1859)
OKLCH	oklch(42.38% 0.186 273)
XYZ	xyz(10.7615, 6.8033, 42.3325)
Luminance	0.0680 (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

#3339B1 #B1AB33

analogous

#3378B1 #3339B1 #6C33B1

triadic

#3339B1 #B13339 #39B133

tetradic

#3339B1 #B13378 #B1AB33 #33B16C

square

#3339B1 #B13378 #B1AB33 #33B16C

split-complementary

#3339B1 #B16C33 #78B133

monochromatic

#181A52 #252A81 #3339B1 #5459CE #8387DB

Accessibility & contrast

On white

8.90

#3339B1 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.36

#3339B1 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3339B1

8.90:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3339B1	#FFFFFF	#000000	##FFFFFF
##3339B1	1.00	8.90	2.36	8.90
#FFFFFF	8.90	1.00	21.00	1.00
#000000	2.36	21.00	1.00	21.00
##FFFFFF	8.90	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0050B5

Deuteranopia (green-blind)

#0044AF

Tritanopia (blue-blind)

#005970

Achromatopsia (no color)

#4A4A4A

Design tokens & code

CSS

--color: #3339b1;
/* rgb */ color: rgb(51, 57, 177);
/* oklch */ color: oklch(42.4% 0.186 273.0);

Tailwind

colors: {
  custom: {
    50: '#7d70c9',
    500: '#3339b1',
    950: '#000000',
  },
}

SCSS

$custom: #3339b1;
$custom-light: #7d70c9;
$custom-dark: #000000;

JSON

{
  "hex": "#3339b1",
  "rgb": {
    "r": 51,
    "g": 57,
    "b": 177
  },
  "hsl": {
    "h": 237.143,
    "s": 55.263,
    "l": 44.706
  },
  "oklch": {
    "l": 0.42377,
    "c": 0.18618,
    "h": 273
  },
  "luminance": 0.06804
}

Semantic roles & 50–950 ramp

primary

#3339B1

secondary

#C5C17B

accent

#D749DF

background

#F8F6FC

surface

#EFECF8

border

#CAC7D1

text

#0B0713

muted

#7C7A82

Preview Lab

Preview with #3339B1

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

Preview Lab → · Contrast checker → · Palette generator →