A Nitric-colored gas giant would appear as a vibrant shade of deep blue or teal, with hints of green and purple swirling throughout its atmosphere. The presence of nitric compounds in the planet's atmosphere would contribute to its striking color palette, creating a stunning and otherworldly appearance. The intense colors would be visible from great distances, making this gas giant a visually captivating sight in the cosmos.

An Alkalic-colored gas giant would likely appear as a warm and fiery shade of red, orange, or yellow, reflecting the presence of alkali metals in its atmosphere. The colors would be intense and vibrant, with swirling patterns creating a dynamic and visually stimulating appearance. The alkalic chemistry of the planet would give it a unique and distinct coloration that stands out in the vastness of space. The fiery hues would convey a sense of energy and activity, making this gas giant a captivating and awe-inspiring celestial object.