One of the properties of each tool (timers, stopwatches, counters, clocks, containers, and buttons) is its color. Initially, when a tool is added onto the board, it has a color that the application has assigned to it; this color is arbitrary and does not depend on any factors. However, this property can be changed by the user in the settings of each tool.
In order to change the color of the timer is necessary:
To go into the tool settings in one of the available ways:
1 - by pressing the 'Edit' button in the pop-up contextual menu after a long press on the tool, or
2 - by long pressing on the tool - when the pop-up context menu is disabled in the app's Settings (Menu > Settings > Optional settings).
To choose a color from the color palette, which is located in the upper settings box. The palette looks like a set of colored circles. Depending on the size of the palette, the colors can scroll left or right. The dot in the center of the circle indicates that this color is selected for the timer.