doc : README color section updated

README.md

@@ -172,7 +172,11 @@ Samila is a generative art generator written in Python, Samila let's you create
 <img src="https://github.com/sepandhaghighi/samila/raw/master/otherfiles/images/4.png">	
 
 * Supported colors are available in `VALID_COLORS` list
-* `color` and `bgcolor` parameters support color name and RGB/RGBA formats
+* `color` and `bgcolor` parameters supported formats:
+
+    1. Color name (example: `yellow`)
+    2. RGB/RGBA (example: `(0.1,0.1,0.1)`, `(0.1,0.1,0.1,0.1)`)
+    3. Hex (example: `#eeefff`)
 
 ### Regeneration
 ```pycon

examples/demo.ipynb

@@ -151,6 +151,17 @@
     "plt.show()"
    ]
   },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "* `color` and `bgcolor` parameters supported formats:\n",
+    "\n",
+    "    1. Color name (example: `yellow`)\n",
+    "    2. RGB/RGBA (example: `(0.1,0.1,0.1)`, `(0.1,0.1,0.1,0.1)`)\n",
+    "    3. Hex (example: `#eeefff`)"
+   ]
+  },
   {
    "cell_type": "markdown",
    "metadata": {},