Settings in Meta (Accept Value)

['LinKin]

Hello,

This as an example,

<setting 
            name="*displayWinnerMessages" 
            friendlyname="Show the winner of the match" 
            value="true" 
            accept="true,false" 
            desc="Displays the final winner of the match in the chat." 
        /> 

the values accepted are true or false.

How can I edit this when working with hex codes?

<setting 
            name="*errorMsgColor" 
            friendlyname="Error Messages Color" 
            value="#FF0000" 
            accept="[b]IDK What to put here[/b]" 
            desc="Hex Color" 
        />