Connection
Base URL, credentials and a reachable server.
Product
Product features · Relative luminance contrast
01
LumaGauge supports examination of sRGB linearization and luminance ratios while keeping a numeric contrast result separate from a complete accessibility assessment.
Selection
A model available through the configured endpoint.
Capabilities
Context limits and tool support are determined by the model and server.
Relative luminance contrast
● ● ●LumaGauge●
A concrete starting point · Relative luminance contrast ×
def contrast_ratio(left, right):
def luminance(rgb):
if type(rgb) not in (list, tuple) or len(rgb) != 3:
raise ValueError("rgb.container")
rgb = tuple(rgb)
if len(rgb) != 3 or any(type(c) is not int or not 0 <= c <= 255 for c in rgb):
raise ValueError("rgb.channel")
channels = [c / 255 for c in rgb]
linear = [c / 12.92 if c <= 0.04045 else ((c + 0.055) / 1.055)**2.4
for c in channels]
return sum(c * w for c, w in zip(linear, (0.2126, 0.7152, 0.0722)))
a, b = sorted((luminance(left), luminance(right)))
return (b + 0.05) / (a + 0.05)✳Calculate relative-luminance contrast between two three-channel eight-bit RGB colors.
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