Fix macro hygiene of color!

core/src/color.rs

@@ -161,24 +161,26 @@ impl From<[f32; 4]> for Color {
 #[macro_export]
 macro_rules! color {
     ($r:expr, $g:expr, $b:expr) => {
-        Color::from_rgb8($r, $g, $b)
+        $crate::Color::from_rgb8($r, $g, $b)
     };
     ($r:expr, $g:expr, $b:expr, $a:expr) => {
-        Color::from_rgba8($r, $g, $b, $a)
+        $crate::Color::from_rgba8($r, $g, $b, $a)
     };
     ($hex:expr) => {{
         let hex = $hex as u32;
         let r = (hex & 0xff0000) >> 16;
         let g = (hex & 0xff00) >> 8;
         let b = (hex & 0xff);
-        Color::from_rgb8(r as u8, g as u8, b as u8)
+
+        $crate::Color::from_rgb8(r as u8, g as u8, b as u8)
     }};
     ($hex:expr, $a:expr) => {{
         let hex = $hex as u32;
         let r = (hex & 0xff0000) >> 16;
         let g = (hex & 0xff00) >> 8;
         let b = (hex & 0xff);
-        Color::from_rgba8(r as u8, g as u8, b as u8, $a)
+
+        $crate::Color::from_rgba8(r as u8, g as u8, b as u8, $a)
     }};
 }