color
Colors the legend's border.
This property supports the following colors:
- Hexadecimal colors
- RGB colors
- RGBA colors
- Predefined/cross-browser color names
- Predefined SVG colors
- Paint server address
cornerRadius
Makes all the legend's corners rounded.
This property accepts a positive number that defines a quarter ellipse's horizontal and vertical radii which determine the corner's curvature.
dashStyle
Sets a dash style for the legend's border.
The following dash styles are available:
- solid 
 The border is a solid, continuous line.
- longDash 
 The border is displayed using long dashes.
- dash 
 The border is displayed using dashes.
- dot 
 The border is displayed using dots.
- Any combination of 'longDash', 'dash' and 'dot' 
 The border is displayed by repeating the specified combination. For instance, 'dashdotdash'.
opacity
Specifies the transparency of the legend's border.
This property accepts a value from 0 to 1, where 0 makes the border completely transparent, and 1 makes it opaque.
If you have technical questions, please create a support ticket in the DevExpress Support Center.