Colin Kaepernick -- How'd I Celebrate My $126 Mil Contract ... POOL PARTY!!

Colin Kaepernick's idea of a pool party is a lot different from Johnny Manziel's.

After signing his $126 MILLION contract with the San Francisco 49ers, the QB decided to celebrate by meeting up with family members for a private day of fun in the sun.

Kap took pics and tweeted about it -- "How do you celebrate a new contract? You throw a pool party! Turn Up! #troll."

If Colin's family looks happy, they have good reason -- Kap told reporters the first thing he's gonna do with the money is "make sure everyone in my family is set."