There are a couple of issues (uppercase and maybe word order) in the font color tooltips.
1. Open the Mail app. 2. Click on New mail. 3. Select the message body. 4. Select the font color dropdown. 5. Mouseover any color cell from the second row downwards.
Más claro 25 %
25 % más claro
Reason for change
The word order seems wrong: the % sounds more natural at the beginning of the sentence. Also, since the tooltip contains a comma, the text should be lowercase. This affects both to "Darker" and "Lighter" at least.