second revision of updated mermaid styles

customize.dist/src/less2/include/markdown.less

@@ -133,9 +133,15 @@
                 fill: @cp_markdown-block-fg;
             }
             g.legend rect {
-                stroke: black !important;
+                stroke: @cryptpad_text_col !important;
                 stroke-width: 1px;
             }
+            .pieCircle {
+                stroke: @cryptpad_text_col;
+            }
+            text.slice {
+                fill: @cryptpad_text_col;
+            }
         }
         &[mermaid-source^="erDiagram"] {
             rect.er:not(.relationshipLabelBox) {