#3333BB#3333BB

#3333BB is a dark, highly saturated blue. Relative luminance 0.067; OKLCH L 42.4% C 0.205 H 273.3°. Best body text is #FFFFFF at 9.01:1 contrast (WCAG AA passes).

Color values

HEX	#3333BB
RGB	rgb(51, 51, 187)
HSL	hsl(240, 57%, 47%)
HSV	hsv(240, 73%, 73%)
CMYK	cmyk(72.7%, 72.7%, 0%, 26.7%)
CIE-LAB	lab(31.02, 44.76, -70.82)
CIE-LCH	lch(31.02, 83.78, 302.29°)
OKLab	oklab(42.43% 0.012 -0.2049)
OKLCH	oklch(42.43% 0.205 273.3)
XYZ	xyz(11.5157, 6.6582, 47.6823)
Luminance	0.0666 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Sapphire (survey)

#2138AB

ΔE00 3.60

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3333BB #BBBB33

analogous

#3377BB #3333BB #7733BB

triadic

#3333BB #BB3333 #33BB33

tetradic

#3333BB #BB3377 #BBBB33 #33BB77

square

#3333BB #BB3377 #BBBB33 #33BB77

split-complementary

#3333BB #BB7733 #77BB33

monochromatic

#19195B #26268B #3333BB #5959D2 #8989DF

Accessibility & contrast

On white

9.01

#3333BB on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.33

#3333BB on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3333BB

9.01:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3333BB	#FFFFFF	#000000	##FFFFFF
##3333BB	1.00	9.01	2.33	9.01
#FFFFFF	9.01	1.00	21.00	1.00
#000000	2.33	21.00	1.00	21.00
##FFFFFF	9.01	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004FBF

Deuteranopia (green-blind)

#0042B9

Tritanopia (blue-blind)

#005A74

Achromatopsia (no color)

#494949

Design tokens & code

CSS

--color: #3333bb;
/* rgb */ color: rgb(51, 51, 187);
/* oklch */ color: oklch(42.4% 0.205 273.3);

Tailwind

colors: {
  custom: {
    50: '#7f6cd1',
    500: '#3333bb',
    950: '#000000',
  },
}

SCSS

$custom: #3333bb;
$custom-light: #7f6cd1;
$custom-dark: #000000;

JSON

{
  "hex": "#3333bb",
  "rgb": {
    "r": 51,
    "g": 51,
    "b": 187
  },
  "hsl": {
    "h": 240,
    "s": 57.143,
    "l": 46.667
  },
  "oklch": {
    "l": 0.42425,
    "c": 0.20521,
    "h": 273.3
  },
  "luminance": 0.06659
}

Semantic roles & 50–950 ramp

primary

#3333BB

secondary

#C9C981

accent

#E047E0

background

#F8F6FD

surface

#F0EBFA

border

#CBC6D3

text

#0C0714

muted

#7D7A83

Preview Lab

Preview with #3333BB

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

Preview Lab → · Contrast checker → · Palette generator →