User blog comment:--MULLIGANACEOUS--/Valentine's Day 2019: Massive nerfage!/@comment-38501345-20190220104653/@comment-26388711-20190221061714

Please note that the Flash versions are unaffected by the nerf. Furthermore, the Flash versions of levels seems to be largely immune to redesigns now. If you want to play 6-colored levels, you should play on King.com (it still uses Flash), or play on certain times of the day where the tweaks are not active (The tweaks are not active in last Tuesday and Wednesday).

When the tweaks are active, the sixteen remaining levels with six entering colors are:

Level   1 (Tutorial) Level   2 (Tutorial) Level   4 (Tutorial) Level 156 Level 186 Level 319 Level 389 Level 423 Level 430 Level 633 Level 834 Level 1526 Level 1641 Level 1680 Level 1814 Level 2125 Level 2521

The fifteen levels with only two entering candies are:

Level 2424 Level 2569 Level 2595 Level 2626 Level 2821 Level 2882 Level 3101 Level 3136 Level 3237 Level 3254 Level 3303 Level 3309 Level 3455 Level 3763 Level 3809

There are also 167 levels with three colors, including the unreleased ones.

You indeed guessed it right!