JSFiddle - React, Tailwind, and code Playground

JavaScript

const jsonData = '{"cols":[{"label":"sprint_status","type":"string"},{"label":"count","type":"string"}],"rows":[{"c":[{"v":"NOT_COMPLETED"},{"v":4}]}]}';

const DataMap = {
  COMPLETED: 'green',
  NOT_COMPLETED: 'red',
};

let colors = [];

Object.keys(DataMap).forEach((key, index) => {
	if (jsonData.search("\"" + key + "\"") !== -1) {
  	colors.push(DataMap[key]);
  }
});

console.log(colors);