watermark opacity and page wrapping in tables

I have 2 questions.

Watermark

I use the watermark option to mark draft pdf documents for review, however we've found it to be too dark at times. Is there a way to set it so it is lighter in color or more transparent? I looked through the CSS, but I didn't see any style that was obviously for a watermark, and I don't see any settings about it in any of the preferences menus. 

Page Wrapping in Tables

I created a binder class that I wrap all the sections I don't want split between pages. It is a pain to set up for new topics because I have to go into the code and enter it all manually, but once it place it doesn't need much upkeep unless topics are eventually split into two or more topics. I put an example of the CSS and how I use it in HTML below. It may not be pretty, but I'm still just learning coding and it works.

CSS

div.binder {
  page-break-inside: avoid;
}

HTML example

<div class="binder">
  <h3>Something Cool</h3>
  <p>Some text about the cool thing.</p>
  <img src="../../assets/images/coolthing.png"/>
</div>

My problem is that I have a very large table that is split between pages, which is fine, except it is split in the middle of a row. This isn't good. Is there a correct place to put the page-break-inside: avoid line in the table CSS so it breaks between rows? I'm working to learn more, but the table CSS is still mostly a mystery for me. From what I've read in some of my searches, the page-break-inside in CSS is sometimes ignored inside of tables?