This is a paid asset, but now you can download Cinematic LUT Pack Free.
Detail this asset from Unity Store: Original Link
Cinematic LUT Pack v1.1 (Latest version)
“If possible, please buy the package to support the developer”
100+ industry-grade LUTs will give your game an instant visual boost
A Look Up Table (LUT) is a texture that contains visual parameters changes. All AAA movies and games uses LUTs.
Cinema LUT Pack contains more than 100 LUTs handmade by visual artists. Just pick your preferred one in the camera inspector and enjoy the professional look applied to your game.
Supports default Unity Color Correctiond and, Unity Tonemapping Color Grading from Cinematic Image Effects (http://u3d.as/mHd) and NEW PostPro Stack (https://github.com/Unity-Technologies/PostProcessing/releases).