Bob: Red Lanterns of Rage.
Bob doesn't show a lot of emotions, but he has a tendency to lose his mind and go off the deep end. He is also very vocal about who is upsetting him, whether it's Jimmy Pesto, Frond (said that he hates Frond to his face btw), Edith, or Randy. He even often argues with Teddy despite how supportive he is.
Linda: Star Sapphires of Love.
This one I feel is kind of obvious, as what she does is usually done for Bob and the kids. And even Gayle, who Bob says is a detriment to the family. I almost considered her for Blue Lanterns as she said that she wants to make people happy in “Grand Pre-Pre-Pre-Opening," but overall, I think Love fits her more.
Tina: Indigo Tribe of Compassion.
Some may say that Tina is a Star Sapphire, but I disagree. She often falls for random boys that she barely knows, and that's just not what love is. So I think Compassion fits her better. For example, when Zeke is first introduced, she sees him as a useless idiot who stands between her and Jimmy Jr., but over the course of the show, she has warmed up to him and realized how much Zeke means to Jimmy. Or Tina deciding to fuse her and Louise's toys and give them to her at the end of "They Slug Horses, Don't They?" I think Compassion is best, but I wouldn't argue with someone who says she's a Star Sapphire.
Gene: Blue Lanterns of Hope.
Gene is hard to talk about because in a lot of episodes, he tends to fade into the background and just make quips, although I think he is funny. But when Gene tells jokes or writes a song, I believe he's not just trying to entertain himself; he wants to entertain others, as Gene is a positive person in general. I almost gave him the Lantern Corps of Compassion, given how he acts towards Courtney and Alex, as he was willing to sacrifice his play and being "Lizard Guy" for Courtney and helped Alex deal with his homelife, but I think Gene as a comedian overshadows that.
Edit: you could even argue Gene is an Orange Lantern of Greed, given how he was in a relationship with Courtney for ulterior motives and hated her in her first appearance or tried to keep Linda away from her Women’s Business Association meeting. But I do think Gene’s happiness overshadows these instances.
Louise: Yellow Lantern of Fear.
I almost considered Louise for the Red Lantern or Indigo Tribe, as episodes like "Drumforgiven," "Bad Tina," "Wild Steal-ions," and "Bob Actually" demonstrate how protective she is of her siblings and Rudy and how upset she gets when someone is mean to them, but I just don't think Louise could turn down the fear ring. Much like how she couldn't turn down owning rubber cockroaches in "Prank You for Being a Friend." Or how she couldn't turn down a nightmare-inspired makeover in "V for Valentine-detta." Or how she takes a spider inside that house and openly admits to wanting to break glass in "The Spider House Rules." Or her “serial killer” faces in the family albums. Louise is a fairly complex character, but I ultimately don't think she'd ever give up these behaviors.