diff --git a/bar.c b/bar.c
index 3fed67e..06d20fb 100644
--- a/bar.c
+++ b/bar.c
@@ -164,8 +164,8 @@ parse_color (const char *str, char **end, const uint32_t def)
          * Don't do anything if we didn't acquire a rgba visual. */
         if (visual != scr->root_visual) {
             const uint8_t a = ((tmp>>24)&255);
-            const uint32_t t1 = (tmp&0xff00ff) * (0x100-a);
-            const uint32_t t2 = (tmp&0x00ff00) * (0x100-a);
+            const uint32_t t1 = (tmp&0xff00ff) * a / 0x100;
+            const uint32_t t2 = (tmp&0x00ff00) * a / 0x100;
             tmp = (a<<24)|(t1&0xff00ff)|(t2&0x00ff00);
         }
         return tmp;