diff --git a/styles/less/v4.0.less b/styles/less/v4.0.less
index 291b92ea596949c62b1f26373154160f35a8ea2f..890b651e4ff62d516368669ac09cdcece8916535 100644
--- a/styles/less/v4.0.less
+++ b/styles/less/v4.0.less
@@ -391,6 +391,7 @@ pre {
 
     &.light-triad {
         background-color: @light-triad;
+        color: #000;
     }
 
     &.dark-complement {
@@ -399,6 +400,7 @@ pre {
 
     &.light-complement {
         background-color: @light-complement;
+        color: #000;
     }
 
     &.dark-neutral {
@@ -411,6 +413,7 @@ pre {
 
     &.light-energetic {
         background-color: @light-energetic;
+        color: #000;
     }
 
     &.dark-energetic {