It’s not chromatic aberration; it’s lens flare (sometimes described as a flare or halo artifact). This happens when a bright light source, often the sun, is in or just outside the frame and light reflects inside the lens, creating colored patches or streaks.

To recreate it, shoot with a strong light source near the edge of the frame and vary your camera angle slightly. Small changes in position can make a big difference, and each lens produces flare differently, so experimentation matters. If you want more flare, remove the lens hood; if you want less, use the hood and avoid strong light hitting the front element.

A practical safety note: don’t point the camera directly at the sun for extended periods. Instead, keep the sun just outside the frame or near the edge and test different compositions.