Allow named colors

[dgutson]

Please allow named colors (maybe as pre-defined constants), at least the basic HTML colors, or https://www.rapidtables.com/web/color/RGB_Color.html,

[dgutson]

Some sources to take the colors from (I think the three have the same):

• https://upload.wikimedia.org/wikipedia/commons/2/2b/SVG_Recognized_color_keyword_names.svg
• https://www.w3schools.com/colors/colors_names.asp
• https://www.w3.org/TR/css-color-4/#named-colors

PlantUML supports at least the last two.

We will attach here a dsl file containing all the constants.

[dgutson]

Thanks, I thought it was easier and future extensible to have a default pre-included dsl with useful pre-defined symbols (as a std structurizr lib), such as constants for the colors, rather than modifying the code. That's why we were going to contribute it, but up to you.
Could you please update the language reference too?

[simonbrowndotje]

Could you please update the language reference too?

Yes, the DSL language reference (and DSL parser error messages) will be updated after structurizr-client:1.18.0 has been released to Maven Central, and the dependency is updated.

[dgutson]

Thanks!

[dgutson]

any chance to turn colors case-insensitive? as the General Rules state:

• Keywords are case-insensitive (e.g. you can use softwareSystem or softwaresystem).

The following threw an error:

styles {
    element "Group" {
        color "Blue"
    }

com.structurizr.dsl.StructurizrDslParserException: Blue is not a valid hex colour code or HTML colour name at line 3: color "Blue" at line 435: !include styles.dsl