apppublic/appPublic/set_fgcolor.py
2022-06-09 12:45:06 +08:00

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# -*- coding=utf-8 -*-
"""
kivy color:
[ r, g, b, a]
不同的颜色值总能找到一个人眼感知的灰度值,这是著名的心理学公式:
灰度 = 红×0.299 + 绿×0.587 + 蓝×0.114
当灰度值大于0.5时使用暗色,否则使用明色
"""
def get_fgcolor_from_bgcolor(bgcolor):
dark_fgcolor=[0.11,0.11,0.11,1]
bright_fgcolor=[0.89,0.89,0.89,1]
graylevel = 0.299 * bgcolor[0] + \
0.587 * bgcolor[1] + \
0.114 * bgcolor[2]
if graylevel > 0.5:
return dark_fgcolor
else:
return bright_fgcolor