sublimetext2 - Change apparance of whitespace dot to something bigger / darker

Question

I am looking for a way to change the appearance of the whitespace grey dot to something bigger and darker (without changing the background color) -- similar to UltraEdit (see screenshot).

I've read all the popular threads on the issue, and I've tried all the popular modifications (e.g., plugins, and/or changing the language and theme files), but I haven't found a way to darken the grey dot or make it any bigger.

I've already experimented with everything mentioned in this related thread, including the links set forth therein: Sublime Text 2: how to change white space characters color?

---

_{(source: lawlist.com)}

---

.tmTheme

<!-- BEGIN whitespace / tab definitions -->
<dict>
  <key>scope</key>
  <string>lawlist.tab</string>
  <key>settings</key>
  <dict>
    <key>fontStyle</key>
    <string></string>
    <key>foreground</key>
    <string>#FF0000</string>
    <key>background</key>
    <string>#FFFFFF</string>
  </dict>
</dict>
<dict>
  <key>scope</key>
  <string>lawlist.space</string>
  <key>settings</key>
  <dict>
    <key>fontStyle</key>
    <string></string>
    <key>foreground</key>
    <string>#000000</string>
    <key>background</key>
    <string>#FFFFFF</string>
  </dict>
</dict>
<!-- END whitespace / tab definitions -->

---

.tmLanguage

<!-- BEGIN whitespace / tab definitions -->
<dict>
  <key>match</key>
  <string>\t+</string>
  <key>name</key>
  <string>lawlist.tab</string>
</dict>

<dict>
  <key>match</key>
  <string> +</string>
  <key>name</key>
  <string>lawlist.space</string>
</dict>
<!-- END -->