Update README.md

Author: gammasoft71

docs/documentation/tips_and_tricks/README.md

@@ -13,6 +13,7 @@ You will find concrete solutions to common problems encountered with xtd in mode
 
 | Category                                                                                                                     | Subject                                                                                                                        | Date                | Level |
 | ---------------------------------------------------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------ | ------------------- | ----- |
+| [![core](/pictures/xtd.core.png)](https://gammasoft71.github.io/xtd/reference_guides/latest/group__xtd__core.html)           | [#9 - Adding color to console output (text + background)](/docs/documentation/tips_and_tricks/9)                               | October 27, 2025    | 🟢    |
 | [![core](/pictures/xtd.core.png)](https://gammasoft71.github.io/xtd/reference_guides/latest/group__xtd__core.html)           | [#8 - xtd::collections::array_list a heterogeneous container supporting multiple types](/docs/documentation/tips_and_tricks/8) | October 14, 2025    | 🟢    |
 | [![forms](/pictures/xtd.forms.png)](https://gammasoft71.github.io/xtd/reference_guides/latest/group__xtd__forms.html)        | [#7 - Creating a simple form with a button](/docs/documentation/tips_and_tricks/7)                                             | September 29, 2025  | 🟢    |
 | [![core](/pictures/xtd.core.png)](https://gammasoft71.github.io/xtd/reference_guides/latest/group__xtd__core.html)           | [#6 - Getting special folders](/docs/documentation/tips_and_tricks/6)                                                          | September 15, 2025  | 🟢    |