Color array for xml data

Hello! i need use array color for xml data, now i use:

color.lightColor = uint(mycolor.series.serie[setcolor].attribute("lightColor"));

in xml:

<serie lightColor=“0xFF0000” name=“Day 1” value=“100” />
<serie lightColor=“0xFF9900” name=“Day 2” value=“150” />

but specify a color for each element via XML is not very convenient, especially when the xml is generated via php, how can I do better?