Hydrochloric gas giant is a hypothetical planet composed mostly of hydrogen and helium, with a thick atmosphere of hydrochloric acid gas. The color of this gas giant would likely be a pale yellow or greenish hue due to the presence of the hydrochloric acid, which can give off a yellowish tint. The high levels of hydrogen and helium in the atmosphere would also contribute to the color, possibly creating variations of white, yellow, and green in the overall appearance of the planet. The intense winds and storms on this gas giant would further mix and swirl the colors, creating a dynamic and mesmerizing visual effect.

A corundic gas giant is a theoretical planet composed primarily of corundum, which is a crystalline form of aluminum oxide. The presence of corundum in the atmosphere would give the planet a distinct bluish hue, similar to the color of sapphires and certain types of corundum gemstones. The intense pressure and temperature on this gas giant would likely create a thick, turbulent atmosphere with swirling patterns of blue and possibly hints of violet or purple. The unique composition of corundum would make this gas giant stand out from traditional gas giants like Jupiter and Saturn, which are primarily composed of hydrogen and helium. The presence of corundum in the atmosphere would also affect the planet's physical properties and behavior, potentially leading to unusual weather patterns and atmospheric phenomena. Overall, a corundic gas giant would be a striking and visually captivating celestial body with a vibrant blue color that sets it apart from other planets in the universe.