#3366B2#3366B2

#3366B2 is a mid, vivid blue. Relative luminance 0.134; OKLCH L 51.5% C 0.133 H 258.3°. Best body text is #FFFFFF at 5.70:1 contrast (WCAG AA passes).

Color values

HEX	#3366B2
RGB	rgb(51, 102, 178)
HSL	hsl(216, 55%, 45%)
HSV	hsv(216, 71%, 70%)
CMYK	cmyk(71.3%, 42.7%, 0%, 30.2%)
CIE-LAB	lab(43.39, 9.01, -45.42)
CIE-LCH	lch(43.39, 46.30, 281.22°)
OKLab	oklab(51.46% -0.0268 -0.1298)
OKLCH	oklch(51.46% 0.133 258.3)
XYZ	xyz(14.1496, 13.4194, 43.9553)
Luminance	0.1342 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3366B2 #B27F33

analogous

#33A5B2 #3366B2 #4033B2

triadic

#3366B2 #B23366 #66B233

tetradic

#3366B2 #B233A5 #B27F33 #33B240

square

#3366B2 #B233A5 #B27F33 #33B240

split-complementary

#3366B2 #B24033 #A5B233

monochromatic

#182F53 #254B82 #3366B2 #5485CE #84A7DC

Accessibility & contrast

On white

5.70

#3366B2 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.68

#3366B2 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3366B2

5.70:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3366B2	#FFFFFF	#000000	##FFFFFF
##3366B2	1.00	5.70	3.68	5.70
#FFFFFF	5.70	1.00	21.00	1.00
#000000	3.68	21.00	1.00	21.00
##FFFFFF	5.70	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#426DB5

Deuteranopia (green-blind)

#2C61B0

Tritanopia (blue-blind)

#007883

Achromatopsia (no color)

#666666

Design tokens & code

CSS

--color: #3366b2;
/* rgb */ color: rgb(51, 102, 178);
/* oklch */ color: oklch(51.5% 0.133 258.3);

Tailwind

colors: {
  custom: {
    50: '#7a91c9',
    500: '#3366b2',
    950: '#000000',
  },
}

SCSS

$custom: #3366b2;
$custom-light: #7a91c9;
$custom-dark: #000000;

JSON

{
  "hex": "#3366b2",
  "rgb": {
    "r": 51,
    "g": 102,
    "b": 178
  },
  "hsl": {
    "h": 215.906,
    "s": 55.459,
    "l": 44.902
  },
  "oklch": {
    "l": 0.51457,
    "c": 0.13252,
    "h": 258.3
  },
  "luminance": 0.13421
}

Semantic roles & 50–950 ramp

primary

#3366B2

secondary

#C5A87C

accent

#A349DF

background

#F8F8FC

surface

#EFF0F8

border

#CACBD1

text

#0A0C13

muted

#7C7D82

Preview Lab

Preview with #3366B2

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

Preview Lab → · Contrast checker → · Palette generator →