Photoshop Color Pickers

Download via Adobe Exchange:
︎︎︎OK Color Picker

This Photoshop plugin shows the corresponding grayscale value for any given color. Additionally, the spectrum is displayed with a perceptually consistent lightness across all the hues. Generally, the picker clarifies the relationship between hue, chroma, and lightness.

Uses chroma.js & OKLab Colorspace. To learn more about OKcolorspace visit ︎︎︎

Download via Adobe Exchange:
︎︎︎Paint Machine

This color picker tool for Photoshop, allows for accurate simulation of paint pigment mixing. Choose from paints such as Ultramarine Blue, Cadmium Red, Hansa Yellow, etc. 
Uses Mixbox. Learn more at ︎︎︎