diff --git a/core/src/gui/widgets/waterfall.cpp b/core/src/gui/widgets/waterfall.cpp
index e7abbc71..c1334faf 100644
--- a/core/src/gui/widgets/waterfall.cpp
+++ b/core/src/gui/widgets/waterfall.cpp
@@ -7,7 +7,6 @@
 #include <volk/volk.h>
 #include <GLFW/glfw3.h>
 #include <spdlog/spdlog.h>
-#include <utils/color.h>
 
 float DEFAULT_COLOR_MAP[][3] = {
     {0x00, 0x00, 0x20},
diff --git a/core/src/utils/color.h b/core/src/utils/color.h
index 4bb52e53..450dbaa7 100644
--- a/core/src/utils/color.h
+++ b/core/src/utils/color.h
@@ -41,10 +41,4 @@ namespace color {
         g += m;
         b += m;
     }
-
-    inline void interpRGB(float ar, float ag, float ab, float br, float bg, float bb, float& or, float& og, float& ob, float ratio) {
-        or = ar + (br - ar) * ratio;
-        og = ag + (bg - ag) * ratio;
-        ob = ab + (bb - ab) * ratio;
-    }
 }
\ No newline at end of file