diff --git a/runtime/themes/autumn.toml b/runtime/themes/autumn.toml
index 501675da1..935c72e58 100644
--- a/runtime/themes/autumn.toml
+++ b/runtime/themes/autumn.toml
@@ -75,7 +75,7 @@ my_black      = "#212121" # Cursorline
 my_gray0      = "#262626" # Default Background
 my_gray1      = "#2b2b2b" # Ruler
 my_gray2      = "#323232" # Lighter Background (Used for status bars, line number and folding marks)
-my_gray3      = "#505050" # Selection Background
+my_gray3      = "#3d3d3d" # Selection Background
 my_gray4      = "#7c7c7c" # Comments, Invisibles, Line Highlighting
 my_gray5      = "#a8a8a8" # Dark Foreground (Used for status bars)
 my_gray6      = "#c8c8c8" # Light Foreground (Not often used)