diff --git a/src/core/config.js b/src/core/config.js
index 9d9f8e31d1..e3a1911576 100644
--- a/src/core/config.js
+++ b/src/core/config.js
@@ -47,17 +47,19 @@ export default function (vm) {
return this.__themeColor;
},
set themeColor(value) {
- this.__themeColor = value;
- console.warn(
- stripIndent(/* html */ `
- $docsify.themeColor is deprecated. Use a --theme-color property in your style sheet. Example:
-
- `).trim()
- );
+ if (value) {
+ this.__themeColor = value;
+ console.warn(
+ stripIndent(`
+ $docsify.themeColor is deprecated. Use a --theme-color property in your style sheet. Example:
+
+ `).trim()
+ );
+ }
},
},