Here is the full list of all 33 Chicory: A Colorful Tale achievements.
Collect all decor
Pick up all litter
Collect all clothing items
Complete all art classes
Delivered all of Artichoke's mail
Deliver mail for Artichoke
Reveal 100% of the map
Discover all Brush Styles
Find all lost kids
Fill in Gelato's photo gallery
Destroyed the Brush.
Grew a brush
Solve the mystery of stolen furniture
Solve all of Oats' outfit riddles
Collect 50% of decor
Planted the Brushflowers
Shook Chicory's hand
Collect 25% of decor
Pick up 50% of litter
Painted your wielder self-portrait
Collect 50% of clothing items
Sang with Chicory
Started the Wielder Trials
Pick up 25% of litter
Met Queen Drosera
Collect 25% of clothing items
Discover 50% of Brush Styles
Reveal 50% of the map
Chicory painted you
Had a conversation with Chicory on the phone!
Met Chicory!
Return Beans' kids to her
Pick up Chicory's brush