No-line_court
The multi-colored no-line tennis court is a variant design for a tennis court introduced by World TeamTennis (WTT) during its early years.
The different areas of the no-line tennis court are defined by colors instead of white lines. White lines on a standard tennis court are painted onto a single or two-tone, colored background, as required by the rules of the United States Tennis Association (USTA) and the International Tennis Federation (ITF).