#399fdf
a balanced, vivid blue · cool · closest name: steelblue
RGB
57, 159, 223
HSL
203°, 72%, 55%
CMYK
74, 29, 0, 13
Luminance
0.3099
Every format
| HEX | #399fdf |
| RGB | rgb(57, 159, 223) |
| HSL | hsl(203, 72%, 55%) |
| CMYK | cmyk(74%, 29%, 0%, 13%) |
| LAB | lab(62.5 -8.1 -40.8) |
| LCH | lch(62.5 41.5 258.8) |
| OKLCH | oklch(0.673 0.132 240.7) |
Copy-ready code
/* CSS */
color: #399fdf;
background-color: #399fdf;
/* Tailwind (arbitrary) */
class="text-[#399fdf] bg-[#399fdf]"
/* SCSS */
$brand: #399fdf;
/* SwiftUI */
Color(red: 0.224, green: 0.624, blue: 0.875)
/* Android */
Color.parseColor("#399fdf")Accessibility — WCAG contrast
Aa
#399fdf on white: 2.92:1
AA ✗ fail · AA-large ✗ · AAA ✗
Aa
#399fdf on black: 7.20:1
AA ✓ pass · AA-large ✓ · AAA ✓
true color
protanopia
deuteranopia
tritanopia
RGB percentages
Red22.4%
Green62.4%
Blue87.5%
CMYK percentages
Cyan74.4%
Magenta28.7%
Yellow0.0%
Key (black)12.5%
Color previews
#399fdf text on a black background
contrast 7.20:1
Card sample
#399fdf text on a white background
contrast 2.92:1
Card sample
CSS3 live lab
Text font color
The quick brown fox
color: #399fdf;
Background color
Panel with #399fdf background
background-color: #399fdf;
Text shadow — hex
Glowing headline
text-shadow: 2px 2px 8px #399fdf;
Text shadow — RGB
Soft neon halo
text-shadow: 0 0 14px rgba(57, 159, 223, 0.45);
Div box shadow
Elevated card
box-shadow: 0 12px 32px -8px rgba(57, 159, 223, 0.45);
Border & gradient
Gradient panel
border: 3px solid #399fdf; background: linear-gradient(135deg, #399fdf, #4239DF);