When you write colored text on a sign, the color disappears when you move to the next line on the sign.

A text written on a sign that contains some color (§), the color of the text disappears when moving to the next line of the sign.

Step 1: put a sign anywhere
Step 2: write the symbol "§" and a value (1, 2, 3, 4, 5, 6, 7, 8, 9, 0, l, k, a, e, g, b)
Step 3: write a long text on the sign
Step 4: finish writing. After that, you will notice that the color of the following lines where you put "§" is not there