Little is known of the being as Chroma  until he appeared in Los Angeles in the mid-1980's at an open air rock concert being attended by scores of people, including several members of Infinity Inc.  Descending from the skies, he absorbed all the energy from nearby electronics and seized the microphone beginning a mournful dirge about the impending destruction of Earth.  The wordless tune enthralls the crowd including the Infinitors but Obsidian is unmoved and stalks toward the colorful being.  Absorbing all the colored light that Chroma directed at him, Obsidian wades in close and renders Chroma unconscious with a strong blow to the jaw.  The Infinitors then collect the fallen alien and depart.

Dropping of Chroma at a nearby hospital, the Infinitors find every TV in the country apparently tuned into Chroma's performance of the previous night.  While Chroma evidently lay comatose, the world dissolved into discord about the fate of Chroma with most who had heard his song fallen under his sway.  When he awakened, the Infinitors were summoned to his room as the crowd outside the hospital began to riot.  While many of the Infinitors fell under his swap, Obsidian remain adamant that Chroma was a threat but eventually after engaging the heroes in a brief battle, Chroma left the hospital, announcing that his actions had been an experiment on a lesser species and that he would return in one million years with a new song to see how Earth had progressed.  He then dissolved into dust.

Further actions of Chroma on Earth-Two are unrevealed.