Colour name variables for Tables and Groups

Feature Suggestions
1

The ability to colour table headers and table groups is great, the next step to make this even better would be to have colour variables so I don’t have to remember the hex codes when editing the DBML (not using the mouse).

Instead of writing Table "http_log" [headercolor: #011B4E] { ... } it would be nice to be able to name colours, such as:

Colours {
  framework #011B4E
  security #2D6512
  ... 
}

Table "http_log" [headercolor: framework] {
  ...
}