1 files changed, 4 insertions, 0 deletions

diff --git a/color.h b/color.h
index badc6e7..61a5a56 100644
--- a/color.h
+++ b/color.h
@@ -5,4 +5,8 @@ typedef struct {
 	int r, g, b;
 } color_t;
 
+extern color_t color_fix(color_t col);
+extern color_t color_add(color_t a, color_t b);
+extern color_t color_mul(color_t col, double s);
+
 #endif
\ No newline at end of file