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.

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