Terminal "note" colour is incorrect

[0xmdl]

A bit more testing reveals some issues with terminal colours. This affects the three variations of the theme. Light, Dark, and Dark2. On Light, the "note" text colour is pure white, and for Dark and Dark2 is pure black.

[0xmdl]

@huacnlee thanks once again for the quick fix!
On a side note, this issue seems to be consistent with all the default themes that come with Zed, or is it just me?

[huacnlee]

It's because I was not done with all color variables.