Another good option is Perception, which offers research-backed color palette suggestions. The service offers a variety of features, including palette generation, analysis, inspiration and validation. It's geared for designers who want to make color choices that are attention grabbing and emotionally resonant, and it offers free and paid subscription options.
Also worth a look is Color Fuse AI, which offers a chatbot interface to generate palettes. It's faster and more conversational than some other options, and it works with multiple design apps like Illustrator, Photoshop and Figma. A free version offers the AI chatbot interface and some customization options.
If you want more flexibility, Huemint uses machine learning to generate color palettes with a variety of options, including gradients and different AI models. You can upload images to generate palettes, too, which can be useful if you want to create something more unusual and visually interesting for your brand.