颜色

https://htmlcolors.com/

https://www.colorhexa.com/

网页转PDF

https://www.printfriendly.com/

https://webpagetopdf.com/

教程网站

菜鸟教程

开源P图GIMP

https://www.gimp.org/downloads/

思维导图

https://gitmind.cn/

VS code

https://code.visualstudio.com/