diff --git a/hm-module.nix b/hm-module.nix
index f6ab6c1..328c0af 100644
--- a/hm-module.nix
+++ b/hm-module.nix
@@ -114,15 +114,15 @@ in {
                                   {...}: {
                                     options = {
                                       red = mkOption {
-                                        type = int;
+                                        type = ints.between 0 255;
                                         default = 0;
                                       };
                                       green = mkOption {
-                                        type = int;
+                                        type = ints.between 0 255;
                                         default = 0;
                                       };
                                       blue = mkOption {
-                                        type = int;
+                                        type = ints.between 0 255;
                                         default = 0;
                                       };
                                       custom = mkOption {