What are some alternatives?
Colormind - A color palette generator powered by deep learning.
TinEye Color extraction - Extracts color palette for all the colors identified in your image
Adobe Color CC - Generates color themes that can inspire any project.
Color Hunt - Curated collection of beautiful colors, updated daily
Color Palette Generator - Enter the URL of an image and find its color palette
Material Palette - Generate and export your Material Design color palette