A plugin for Openplanet in Trackmania which can help create color text in-game.
Open the GUI by selecting "Color Picker" from the Openplanet plugins menu.
Enter your text into the Input Text textbox.
Select the color by dragging or setting the values of R, G, and B (Red, Green, and Blue), or through the color picker tool which is opened by clicking on the colored square.
Click the Copy button next to the Color Code or Coded Text as desired to copy only the color code or the whole color coded text.