#3366BB#3366BB

#3366BB is a mid, vivid blue. Relative luminance 0.138; OKLCH L 52.1% C 0.145 H 260.0°. Best body text is #FFFFFF at 5.59:1 contrast (WCAG AA passes).

Color values

HEX	#3366BB
RGB	rgb(51, 102, 187)
HSL	hsl(218, 57%, 47%)
HSV	hsv(218, 73%, 73%)
CMYK	cmyk(72.7%, 45.5%, 0%, 26.7%)
CIE-LAB	lab(43.93, 12.36, -49.80)
CIE-LCH	lch(43.93, 51.31, 283.94°)
OKLab	oklab(52.05% -0.0251 -0.1426)
OKLCH	oklch(52.05% 0.145 260)
XYZ	xyz(15.0830, 13.7928, 48.8714)
Luminance	0.1379 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3366BB #BB8833

analogous

#33AABB #3366BB #4433BB

triadic

#3366BB #BB3366 #66BB33

tetradic

#3366BB #BB33AA #BB8833 #33BB44

square

#3366BB #BB33AA #BB8833 #33BB44

split-complementary

#3366BB #BB4433 #AABB33

monochromatic

#19325B #264C8B #3366BB #5987D2 #89AADF

Accessibility & contrast

On white

5.59

#3366BB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.76

#3366BB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3366BB

5.59:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3366BB	#FFFFFF	#000000	##FFFFFF
##3366BB	1.00	5.59	3.76	5.59
#FFFFFF	5.59	1.00	21.00	1.00
#000000	3.76	21.00	1.00	21.00
##FFFFFF	5.59	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3B6FBE

Deuteranopia (green-blind)

#1E62B9

Tritanopia (blue-blind)

#007A87

Achromatopsia (no color)

#686868

Design tokens & code

CSS

--color: #3366bb;
/* rgb */ color: rgb(51, 102, 187);
/* oklch */ color: oklch(52.1% 0.145 260.0);

Tailwind

colors: {
  custom: {
    50: '#7c91d0',
    500: '#3366bb',
    950: '#000000',
  },
}

SCSS

$custom: #3366bb;
$custom-light: #7c91d0;
$custom-dark: #000000;

JSON

{
  "hex": "#3366bb",
  "rgb": {
    "r": 51,
    "g": 102,
    "b": 187
  },
  "hsl": {
    "h": 217.5,
    "s": 57.143,
    "l": 46.667
  },
  "oklch": {
    "l": 0.52055,
    "c": 0.14483,
    "h": 260
  },
  "luminance": 0.13794
}

Semantic roles & 50–950 ramp

primary

#3366BB

secondary

#C9AE81

accent

#A747E0

background

#F8F8FC

surface

#EFF0F9

border

#CACBD2

text

#0B0C14

muted

#7C7D82

Preview Lab

Preview with #3366BB

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

Preview Lab → · Contrast checker → · Palette generator →