rebased to use custom struct over String

src/model_rgb_ascii.rs

@@ -0,0 +1,29 @@
+
+pub struct RGB {
+    pub r: u8,
+    pub g: u8,
+    pub b: u8,
+}
+
+pub struct Ascii {
+    pub char: char,
+    pub rgb: RGB,
+}
+
+
+impl Ascii {
+    fn _new(char: char, r: u8, g: u8, b: u8) -> Self {
+        Ascii {
+            char,
+            rgb: RGB {
+                r,
+                g,
+                b,
+            },
+        }
+    }
+
+    pub fn new(ch: u8, r: u8, g: u8, b: u8) -> Self {
+        Self::_new(char::from(ch), r, g, b)
+    }
+}