[clang] Improve colors in status tracking web pages.

Use a consistent, more pastel color for unknown status
in papers and issues tracking pages

Author: cor3ntin

clang/.clang-tidy

@@ -1,5 +1,5 @@
 # Note that the readability-identifier-naming check is disabled, there are too
 # many violations in the codebase and they create too much noise in clang-tidy
 # results.
-Checks: '-readability-identifier-naming'
+Checks: '-readability-identifier-naming, -misc-include*'
 InheritParentConfig: true

clang/www/c_dr_status.html

@@ -12,7 +12,7 @@
     .unreleased { background-color: #FFFF99 }
     .full { background-color: #CCFF99 }
     .na { background-color: #DDDDDD }
-    .unknown { background-color: #FF55FF }
+    .unknown { background-color: #EBCAFE }
     .open * { color: #AAAAAA }
     //.open { filter: opacity(0.2) }
     tr:target { background-color: #FFFFBB }
@@ -35,7 +35,7 @@ <h2 id="cdr">C defect report implementation status</h2>
 
 <p>The implementation status for defect reports against the C Standard are
 currently under investigation. Any defect report whose status in Clang is
-currently unknown will be marked in <span class="unknown">magenta</span>.</p>
+currently unknown will be marked in <span class="unknown">purple</span>.</p>
 
 <p>The <a href="https://github.com/llvm/llvm-project/issues/">LLVM bug tracker</a> uses
 the "c", "c99", "c11", "c17", and "c23" labels to track known bugs with Clang's language

clang/www/c_status.html

@@ -9,7 +9,7 @@
     .none { background-color: #FFCCCC }
     .partial { background-color: #FFE0B0 }
     .unreleased { background-color: #FFFF99 }
-    .unknown { background-color: #FF55FF }
+    .unknown { background-color: #DDAEF7 }
     .full { background-color: #CCFF99 }
     .na { background-color: #DDDDDD }
     :target { background-color: #FFFFBB; outline: #DDDD55 solid thin; }