feat: UI content changes.

Presently/presently/users/templates/users/colourcube.html

@@ -113,8 +113,8 @@
                 <div class="g__row">
                     <div class="g__col g--two rhythm">
                         <h3>Criteria</h3>
-                        <p>This tool shows three different ratio targets and how your color performs with each — white,
-                            black, or other colors in your palette:</p>
+                        <p>This shows three different ratio targets and how color performs with each — white,
+                            black, or other colors in the palette:</p>
                         <ul>
                             <li><strong class="text-light">WCAG Level AAA:</strong> a contrast ratio equal or greater
                                 than <strong>7.0</strong>. For large-scale text, a ratio equal or greater than