There are currently 14 official Joy-Con color variations (not including special editions). These standard Joy-Con colors are all solid, with the color carrying
Nintendo Switch Custom Joy Con Controller Joy-Cons NEW! PICK YOUR COLOR!, joy cons
Orzly Accessory Bundle Kit Designed for Nintendo Switch Accessories Geeks and OLED Console Users Case and Screen Protector, Joycon Grips and Wheels for Enhanced Games Play and More - Jet Black
Nintendo Switch Custom Joy Con Controller Joy-Cons NEW! PICK YOUR COLOR!, joy cons
Joy-Con Colors - Nintendo Switch Guide - IGN
Joy-Con Colors - Nintendo Switch Guide - IGN
Possible US non-neon red joycon release ? : r/NintendoSwitch
Check Out Nintendo Switch's Pretty New Joy-Con Colors
Nintendo Switch Joy-Cons appear to be having some issues
There Are Now Well Over 250 Nintendo Switch Joy-Con Combinations
Fortnite Nintendo Switch Special Edition Revealed, With New Joy-Con Colors
Joy-Con Controllers - Nintendo Switch Guide - IGN
Special Edition Joy-Con - Nintendo Switch Guide - IGN