#3366B8#3366B8

#3366B8 is a mid, vivid blue. Relative luminance 0.137; OKLCH L 51.9% C 0.141 H 259.5°. Best body text is #FFFFFF at 5.62:1 contrast (WCAG AA passes).

Color values

HEX	#3366B8
RGB	rgb(51, 102, 184)
HSL	hsl(217, 57%, 46%)
HSV	hsv(217, 72%, 72%)
CMYK	cmyk(72.3%, 44.6%, 0%, 27.8%)
CIE-LAB	lab(43.75, 11.24, -48.35)
CIE-LCH	lch(43.75, 49.64, 283.09°)
OKLab	oklab(51.85% -0.0256 -0.1384)
OKLCH	oklch(51.85% 0.141 259.5)
XYZ	xyz(14.7652, 13.6656, 47.1977)
Luminance	0.1367 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3366B8 #B88533

analogous

#33A8B8 #3366B8 #4233B8

triadic

#3366B8 #B83366 #66B833

tetradic

#3366B8 #B833A8 #B88533 #33B842

square

#3366B8 #B833A8 #B88533 #33B842

split-complementary

#3366B8 #B84233 #A8B833

monochromatic

#183158 #264B88 #3366B8 #5886D1 #88A9DE

Accessibility & contrast

On white

5.62

#3366B8 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.73

#3366B8 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3366B8

5.62:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3366B8	#FFFFFF	#000000	##FFFFFF
##3366B8	1.00	5.62	3.73	5.62
#FFFFFF	5.62	1.00	21.00	1.00
#000000	3.73	21.00	1.00	21.00
##FFFFFF	5.62	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3D6EBB

Deuteranopia (green-blind)

#2462B6

Tritanopia (blue-blind)

#007986

Achromatopsia (no color)

#676767

Design tokens & code

CSS

--color: #3366b8;
/* rgb */ color: rgb(51, 102, 184);
/* oklch */ color: oklch(51.9% 0.141 259.5);

Tailwind

colors: {
  custom: {
    50: '#7b91ce',
    500: '#3366b8',
    950: '#000000',
  },
}

SCSS

$custom: #3366b8;
$custom-light: #7b91ce;
$custom-dark: #000000;

JSON

{
  "hex": "#3366b8",
  "rgb": {
    "r": 51,
    "g": 102,
    "b": 184
  },
  "hsl": {
    "h": 216.992,
    "s": 56.596,
    "l": 46.078
  },
  "oklch": {
    "l": 0.51853,
    "c": 0.14073,
    "h": 259.5
  },
  "luminance": 0.13667
}

Semantic roles & 50–950 ramp

primary

#3366B8

secondary

#C8AC7F

accent

#A648E0

background

#F8F8FC

surface

#EFF0F9

border

#CACBD2

text

#0B0C13

muted

#7C7D82

Preview Lab

Preview with #3366B8

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

Preview Lab → · Contrast checker → · Palette generator →