#3370DC#3370DC

#3370DC is a mid, vivid blue. Relative luminance 0.175; OKLCH L 56.5% C 0.177 H 260.8°. Best body text is #FFFFFF at 4.68:1 contrast (WCAG AA passes).

Color values

HEX	#3370DC
RGB	rgb(51, 112, 220)
HSL	hsl(218, 71%, 53%)
HSV	hsv(218, 77%, 86%)
CMYK	cmyk(76.8%, 49.1%, 0%, 13.7%)
CIE-LAB	lab(48.83, 18.31, -60.84)
CIE-LCH	lch(48.83, 63.54, 286.75°)
OKLab	oklab(56.49% -0.0282 -0.175)
OKLCH	oklch(56.49% 0.177 260.8)
XYZ	xyz(20.0730, 17.4571, 70.0079)
Luminance	0.1746 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3370DC #DC9F33

analogous

#33C4DC #3370DC #4A33DC

triadic

#3370DC #DC3370 #70DC33

tetradic

#3370DC #DC33C4 #DC9F33 #33DC4A

square

#3370DC #DC33C4 #DC9F33 #33DC4A

split-complementary

#3370DC #DC4A33 #C4DC33

monochromatic

#163C7F #1F54B3 #3370DC #6795E5 #9BB9EE

Accessibility & contrast

On white

4.68

#3370DC on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.49

#3370DC on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3370DC

4.68:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3370DC	#FFFFFF	#000000	##FFFFFF
##3370DC	1.00	4.68	4.49	4.68
#FFFFFF	4.68	1.00	21.00	1.00
#000000	4.49	21.00	1.00	21.00
##FFFFFF	4.68	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2F7CE0

Deuteranopia (green-blind)

#006DDA

Tritanopia (blue-blind)

#008A9B

Achromatopsia (no color)

#747474

Design tokens & code

CSS

--color: #3370dc;
/* rgb */ color: rgb(51, 112, 220);
/* oklch */ color: oklch(56.5% 0.177 260.8);

Tailwind

colors: {
  custom: {
    50: '#8398e7',
    500: '#3370dc',
    950: '#000000',
  },
}

SCSS

$custom: #3370dc;
$custom-light: #8398e7;
$custom-dark: #000000;

JSON

{
  "hex": "#3370dc",
  "rgb": {
    "r": 51,
    "g": 112,
    "b": 220
  },
  "hsl": {
    "h": 218.343,
    "s": 70.711,
    "l": 53.137
  },
  "oklch": {
    "l": 0.56492,
    "c": 0.17722,
    "h": 260.8
  },
  "luminance": 0.17459
}

Semantic roles & 50–950 ramp

primary

#3370DC

secondary

#DAC091

accent

#AD3AED

background

#F8F9FE

surface

#F0F2FD

border

#CBCCD5

text

#0C0D16

muted

#7D7E84

Preview Lab

Preview with #3370DC

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

Preview Lab → · Contrast checker → · Palette generator →