#3366B3#3366B3

#3366B3 is a mid, vivid blue. Relative luminance 0.135; OKLCH L 51.5% C 0.134 H 258.5°. Best body text is #FFFFFF at 5.69:1 contrast (WCAG AA passes).

Color values

HEX	#3366B3
RGB	rgb(51, 102, 179)
HSL	hsl(216, 56%, 45%)
HSV	hsv(216, 72%, 70%)
CMYK	cmyk(71.5%, 43%, 0%, 29.8%)
CIE-LAB	lab(43.45, 9.38, -45.91)
CIE-LCH	lch(43.45, 46.86, 281.55°)
OKLab	oklab(51.52% -0.0266 -0.1312)
OKLCH	oklch(51.52% 0.134 258.5)
XYZ	xyz(14.2503, 13.4597, 44.4860)
Luminance	0.1346 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3366B3 #B38033

analogous

#33A6B3 #3366B3 #4033B3

triadic

#3366B3 #B33366 #66B333

tetradic

#3366B3 #B333A6 #B38033 #33B340

square

#3366B3 #B333A6 #B38033 #33B340

split-complementary

#3366B3 #B34033 #A6B333

monochromatic

#183054 #254B83 #3366B3 #5585CE #84A7DC

Accessibility & contrast

On white

5.69

#3366B3 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.69

#3366B3 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3366B3

5.69:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3366B3	#FFFFFF	#000000	##FFFFFF
##3366B3	1.00	5.69	3.69	5.69
#FFFFFF	5.69	1.00	21.00	1.00
#000000	3.69	21.00	1.00	21.00
##FFFFFF	5.69	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#416DB6

Deuteranopia (green-blind)

#2B61B1

Tritanopia (blue-blind)

#007884

Achromatopsia (no color)

#676767

Design tokens & code

CSS

--color: #3366b3;
/* rgb */ color: rgb(51, 102, 179);
/* oklch */ color: oklch(51.5% 0.134 258.5);

Tailwind

colors: {
  custom: {
    50: '#7a91ca',
    500: '#3366b3',
    950: '#000000',
  },
}

SCSS

$custom: #3366b3;
$custom-light: #7a91ca;
$custom-dark: #000000;

JSON

{
  "hex": "#3366b3",
  "rgb": {
    "r": 51,
    "g": 102,
    "b": 179
  },
  "hsl": {
    "h": 216.094,
    "s": 55.652,
    "l": 45.098
  },
  "oklch": {
    "l": 0.51522,
    "c": 0.13389,
    "h": 258.5
  },
  "luminance": 0.13461
}

Semantic roles & 50–950 ramp

primary

#3366B3

secondary

#C6A87C

accent

#A349DF

background

#F8F8FC

surface

#EFF0F8

border

#CACBD1

text

#0A0C13

muted

#7C7D82

Preview Lab

Preview with #3366B3

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

Preview Lab → · Contrast checker → · Palette generator →