You need 4 colors 2 for text and background(primary & secondary colors). 1 accent color to highlight important elements(number 4 & buttons). And an optional tertiary color to add a bit of personality(the hue slider).
Nnapkin:帮助你更好地进行可视化思考 Recraft:为没有设计基础的用户打造的新一代设计工具 谷歌Gemini:Google is the hare who learnt from its missteps and challenged once again the turtle... 🐰 (其他:Groq、Ray-Ban Meta AI 眼镜、Wise、paperswithcode、极米N1S 4K投影仪)