Tsuritama, Sarazanmai Recommendations
Bright, colourful, well-animated shows involving strange creatures (alien fish/Kappa) and a real love for their unique real-life setting (Enoshima/Asakusa). Personal but wacky stories about the feelings and friendship of their protagonists. Also they're both pretty gay.
both feature a group of teen boys in a mission, there is plenty of BL and in my opinion a similar use of colours.
the plot and setting is really different both series give off the same vibe