One possible name for an artwork in space blue and gold color could be "Galactic Glimmer." The combination of blue and gold evokes a sense of mystery and wonder, while the word "galactic" suggests a vast, otherworldly setting. "Glimmer" adds a sense of shimmering or sparkling, perhaps suggesting stars or distant galaxies. Overall, this name could be fitting for a piece that captures the beauty and mystery of the cosmos.