Html Colors is described as 'Get your Html Color codes with our color picker, HEX code, RGB, RGBA, HSL and HSLA values, including HSV, HWB and CMYK. Go pick!' and is an app. There are more than 10 alternatives to Html Colors for a variety of platforms, including Online / Web-based, Android, iPhone, iPad and Self-Hosted solutions. The best alternative is Color Hunt, which is free. Other great apps like Html Colors are Color hexa, Gradient Hunt, Coolors and Picular.
Hex Palette is your place for color ideas.
Built with designers in mind, this tool gives you new color palettes, so you can add different combinations to your projects. On top of it, you can also create your own palettes and play around with it.