How to change the text color when selected with Tab?

[aj3423]

I want to change the text color when user typing. Yellow color for "valid" input, Red for "invalid". To simplify the problem, here I use len(text) < 3 for "invalid".

func executor(string) {}

var p *prompt.Prompt

func complete(d prompt.Document) []prompt.Suggest {
	ret := []prompt.Suggest{}

	if len(d.Text) < 3 {
		ret = append(ret, prompt.Suggest{"some_long_text", ""})
		prompt.OptionInputTextColor(prompt.Red)(p)
	} else {
		prompt.OptionInputTextColor(prompt.Yellow)(p)
	}

	return ret
}

func main() {
	p = prompt.New(executor, complete)
	p.Run()
}

The problem is after choosing the suggested Item with Tab key, the text becomes Green, and after press "Enter" to execute it, the text becomes Red. I expected it always in Yellow because the suggested item is "valid".