If I understand your question correctly, then you need a background color for your text.
To do this, before the typed text, press the key combination "CTRL+K
", choose a suitable color number for the text and then set the comma ",
" and choose a color number for the background.
For example, in your case it will be like this:
//echo -a 00,04check background for text
Remember to always close the color code at the end of the place where it should stop coloring the text.