Add hint what the colors mean

Author: rschu1ze

index.html

@@ -423,7 +423,8 @@ <h1>ClickBench — a Benchmark For Analytical DBMS</h1>
                 System &amp; Machine
             </th>
             <th colspan="2">
-                Relative <span id="time-or-size">time</span> (lower is better)
+                Relative <span id="time-or-size">time</span> (lower is better).<br>
+                Different colors represent different logarithmic scales (1x, 10x, 100x zoom) of the same value.
             </th>
         </tr>
     </thead>