Repeats for wrong length input

main.cpp

@@ -0,0 +1,21 @@
+#include <iostream>
+
+using namespace std;
+const int RGB_HEX_LENGTH = 7;
+
+int main(){
+    string input;
+
+    do{
+        cout << "Enter a color in hex format (#RRGGBB):";
+        getline(cin, input);
+
+        if( input.size() != RGB_HEX_LENGTH ){
+            cout << "Please enter the color in hexadecimal format, starting with # followed by six hex values\n";
+        }
+    }while( input.size() != RGB_HEX_LENGTH );
+
+    cout << "Your hex color is: " << input << endl;
+
+    return 0;
+}