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#3399ff

a balanced, electric blue · cool · closest name: dodgerblue

RGB
51, 153, 255
HSL
210°, 100%, 60%
CMYK
80, 40, 0, 0
Luminance
0.3071

Every format

HEX#3399ff
RGBrgb(51, 153, 255)
HSLhsl(210, 100%, 60%)
CMYKcmyk(80%, 40%, 0%, 0%)
LABlab(62.3 6.1 -58.8)
LCHlch(62.3 59.1 275.9)
OKLCHoklch(0.675 0.176 252.3)

Copy-ready code

/* CSS */
color: #3399ff;
background-color: #3399ff;
/* Tailwind (arbitrary) */
class="text-[#3399ff] bg-[#3399ff]"
/* SCSS */
$brand: #3399ff;
/* SwiftUI */
Color(red: 0.200, green: 0.600, blue: 1.000)
/* Android */
Color.parseColor("#3399ff")

Accessibility — WCAG contrast

Aa
#3399ff on white: 2.94:1
AA ✗ fail · AA-large · AAA
Aa
#3399ff on black: 7.14:1
AA ✓ pass · AA-large · AAA
true color
protanopia
deuteranopia
tritanopia

RGB percentages

Red20.0%
Green60.0%
Blue100.0%

CMYK percentages

Cyan80.0%
Magenta40.0%
Yellow0.0%
Key (black)0.0%

Color previews

#3399ff text on a black background

contrast 7.14:1

Card sample

#3399ff text on a white background

contrast 2.94:1

Card sample

CSS3 live lab

Text font color

The quick brown fox

color: #3399ff;
Background color
Panel with #3399ff background
background-color: #3399ff;
Text shadow — hex

Glowing headline

text-shadow: 2px 2px 8px #3399ff;
Text shadow — RGB

Soft neon halo

text-shadow: 0 0 14px rgba(51, 153, 255, 0.45);
Div box shadow
Elevated card
box-shadow: 0 12px 32px -8px rgba(51, 153, 255, 0.45);
Border & gradient
Gradient panel
border: 3px solid #3399ff;
background: linear-gradient(135deg, #3399ff, #5533FF);

Monochromatic scale

Palettes built from #3399ff

Shades — darker

Tints — lighter

Hue & tone neighbors

Color harmonies

Nearest named colors

Work with #3399ff in the Color Lab