Triggering on colors - differentiating shades

I have a trigger that responds to any white text by outputting 'Triggered white text.'

In the MUD I'm trying to script for, I can select between 15 different colours for various output. For various reasons, I need to trigger much text based solely on color.

I have, however, two different shades of 'white' output, both of which fire my white text trigger (using the 'white' option in the trigger dialog). These are colors #FFFFFF and #C0C0C0. How would I go about differentiating the two, for purposes of triggers?

(Probably) the bold option. One white is bold, one white isnt (bold for colors means brightness, not weight, although depending on what you have your colors set to, bold might be bright, or dull).
IE those greyed out checkboxes next to the color selection. Greyed out means doesnt matter, checked means only on, unchecked means only off.

That's it, perfect. Thank you!