#3366D7#3366D7

#3366D7 is a mid, vivid blue. Relative luminance 0.151; OKLCH L 54.1% C 0.183 H 263.3°. Best body text is #FFFFFF at 5.22:1 contrast (WCAG AA passes).

Color values

HEX	#3366D7
RGB	rgb(51, 102, 215)
HSL	hsl(221, 67%, 52%)
HSV	hsv(221, 76%, 84%)
CMYK	cmyk(76.3%, 52.6%, 0%, 15.7%)
CIE-LAB	lab(45.79, 22.81, -62.93)
CIE-LCH	lch(45.79, 66.93, 289.93°)
OKLab	oklab(54.06% -0.0213 -0.1813)
OKLCH	oklch(54.06% 0.183 263.3)
XYZ	xyz(18.3780, 15.1108, 66.2249)
Luminance	0.1511 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3366D7 #D7A433

analogous

#33B8D7 #3366D7 #5233D7

triadic

#3366D7 #D73366 #66D733

tetradic

#3366D7 #D733B8 #D7A433 #33D752

square

#3366D7 #D733B8 #D7A433 #33D752

split-complementary

#3366D7 #D75233 #B8D733

monochromatic

#183678 #224CAB #3366D7 #668CE1 #99B3EB

Accessibility & contrast

On white

5.22

#3366D7 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.02

#3366D7 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3366D7

5.22:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3366D7	#FFFFFF	#000000	##FFFFFF
##3366D7	1.00	5.22	4.02	5.22
#FFFFFF	5.22	1.00	21.00	1.00
#000000	4.02	21.00	1.00	21.00
##FFFFFF	5.22	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1174DB

Deuteranopia (green-blind)

#0065D5

Tritanopia (blue-blind)

#008295

Achromatopsia (no color)

#6C6C6C

Design tokens & code

CSS

--color: #3366d7;
/* rgb */ color: rgb(51, 102, 215);
/* oklch */ color: oklch(54.1% 0.183 263.3);

Tailwind

colors: {
  custom: {
    50: '#8291e4',
    500: '#3366d7',
    950: '#000000',
  },
}

SCSS

$custom: #3366d7;
$custom-light: #8291e4;
$custom-dark: #000000;

JSON

{
  "hex": "#3366d7",
  "rgb": {
    "r": 51,
    "g": 102,
    "b": 215
  },
  "hsl": {
    "h": 221.341,
    "s": 67.213,
    "l": 52.157
  },
  "oklch": {
    "l": 0.54062,
    "c": 0.18253,
    "h": 263.3
  },
  "luminance": 0.15113
}

Semantic roles & 50–950 ramp

primary

#3366D7

secondary

#D7C08F

accent

#B43EEA

background

#F8F8FE

surface

#F0F0FC

border

#CBCBD5

text

#0C0C16

muted

#7D7D84

Preview Lab

Preview with #3366D7

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

Preview Lab → · Contrast checker → · Palette generator →