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#339ddf

a balanced, vivid blue · cool · closest name: steelblue

RGB
51, 157, 223
HSL
203°, 73%, 54%
CMYK
77, 30, 0, 13
Luminance
0.3015

Every format

HEX#339ddf
RGBrgb(51, 157, 223)
HSLhsl(203, 73%, 54%)
CMYKcmyk(77%, 30%, 0%, 13%)
LABlab(61.8 -7.6 -41.9)
LCHlch(61.8 42.6 259.7)
OKLCHoklch(0.666 0.136 241.1)

Copy-ready code

/* CSS */
color: #339ddf;
background-color: #339ddf;
/* Tailwind (arbitrary) */
class="text-[#339ddf] bg-[#339ddf]"
/* SCSS */
$brand: #339ddf;
/* SwiftUI */
Color(red: 0.200, green: 0.616, blue: 0.875)
/* Android */
Color.parseColor("#339ddf")

Accessibility — WCAG contrast

Aa
#339ddf on white: 2.99:1
AA ✗ fail · AA-large · AAA
Aa
#339ddf on black: 7.03:1
AA ✓ pass · AA-large · AAA
true color
protanopia
deuteranopia
tritanopia

RGB percentages

Red20.0%
Green61.6%
Blue87.5%

CMYK percentages

Cyan77.1%
Magenta29.6%
Yellow0.0%
Key (black)12.5%

Color previews

#339ddf text on a black background

contrast 7.03:1

Card sample

#339ddf text on a white background

contrast 2.99:1

Card sample

CSS3 live lab

Text font color

The quick brown fox

color: #339ddf;
Background color
Panel with #339ddf background
background-color: #339ddf;
Text shadow — hex

Glowing headline

text-shadow: 2px 2px 8px #339ddf;
Text shadow — RGB

Soft neon halo

text-shadow: 0 0 14px rgba(51, 157, 223, 0.45);
Div box shadow
Elevated card
box-shadow: 0 12px 32px -8px rgba(51, 157, 223, 0.45);
Border & gradient
Gradient panel
border: 3px solid #339ddf;
background: linear-gradient(135deg, #339ddf, #3B33DF);

Monochromatic scale

Palettes built from #339ddf

Shades — darker

Tints — lighter

Hue & tone neighbors

Color harmonies

Nearest named colors

Work with #339ddf in the Color Lab