Mix a base colour with white for lighter tints and with black for darker shades to build a coordinated ladder for buttons and backgrounds.
左→右为由浅(tint)到基色再到深(shade)的渐变;每侧档数即混入白/黑的比例步数。
设计系统(如 Tailwind 的 50–900)常用这种按明度分档的色板组织方式。