diff --git a/runtime/themes/monokai_pro_spectrum.toml b/runtime/themes/monokai_pro_spectrum.toml
index 89575e3a..f5787ca8 100644
--- a/runtime/themes/monokai_pro_spectrum.toml
+++ b/runtime/themes/monokai_pro_spectrum.toml
@@ -53,7 +53,7 @@
 "constructor" = "blue"
 "function" = "green"
 "function.macro" = { fg = "blue" }
-"function.builtin" = { fg = "cyan" }
+"function.builtin" = { fg = "blue" }
 
 # operator, tags, units, punctuations
 "operator" = "red"