mmserebryakov

import re

text = '''
{color:#1f497d}Какой-то тест задачи{color}{color:#1f497d}MAC{color}{color:#1f497d}{color}{color:#1f497d}сервер
текст.{color}
'''

rm_color = re.compile(r'\{color:#[A-Fa-f0-9]{6}}|\{color}')
print(rm_color.sub(' ', text))