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import logging
CREDIT_COLOR = '#009900'
DEBIT_COLOR = '#ff4040'
CATEGORY_COLORS = [
(1.0, 1.0, 1.0),
(1.0, 1.0, 0.6),
(1.0, 1.0, 0.8),
(1.0, 0.6, 1.0),
(1.0, 0.6, 0.6),
(1.0, 0.6, 0.8),
(1.0, 0.8, 1.0),
(1.0, 0.8, 0.6),
(1.0, 0.8, 0.8),
(0.6, 1.0, 1.0),
(0.6, 1.0, 0.6),
(0.6, 1.0, 0.8),
(0.6, 0.6, 1.0),
(0.6, 0.6, 0.6),
(0.6, 0.6, 0.8),
(0.6, 0.8, 1.0),
(0.6, 0.8, 0.6),
(0.6, 0.8, 0.8),
(0.8, 1.0, 1.0),
(0.8, 1.0, 0.6),
(0.8, 1.0, 0.8),
(0.8, 0.6, 1.0),
(0.8, 0.6, 0.6),
(0.8, 0.6, 0.8),
(0.8, 0.8, 1.0),
(0.8, 0.8, 0.6),
(0.8, 0.8, 0.8),
]
def get_category_color(catname):
return CATEGORY_COLORS[catname.__hash__() % len(CATEGORY_COLORS)]
def get_category_color_str(catname):
color = get_category_color(catname)
return "#%02x%02x%02x" % \
(int(color[0] * 255), int(color[1] * 255), int(color[2] * 255))
def is_too_light(color):
return _luminance(color) > 96
def _luminance(color):
''' Calculate luminance value '''
return int(color[1:3], 16) * 0.3 + int(color[3:5], 16) * 0.6 + \
int(color[5:7], 16) * 0.1
def test_luminances():
for cat_color in CATEGORY_COLORS:
color = "#%02x%02x%02x" % \
(int(cat_color[0] * 255), int(cat_color[1] * 255),
int(cat_color[2] * 255))
logging.error('color %s luminance %s', color, _luminance(color))
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