blue()

blue()#

Extracts the blue value from a color, scaled to match current color_mode().

Examples#

example picture for blue()

def setup():
    c = "#AF64DC"  # define color 'c'
    py5.fill(c)  # use color variable 'c' as fill color
    py5.rect(15, 20, 35, 60)  # draw left rectangle
    
    blue_value = py5.blue(c)  # get blue in 'c'
    py5.println(blue_value)  # prints "220.0"
    py5.fill(0, 0, blue_value)  # use 'blue_value' in new fill
    py5.rect(50, 20, 35, 60)  # draw right rectangle

Description#

Extracts the blue value from a color, scaled to match current color_mode().

The blue() function is easy to use and understand, but it is slower than a technique called bit masking. When working in color_mode(RGB, 255), you can achieve the same results as blue() but with greater speed by using a bit mask to remove the other color components. For example, blue(c) and c & 0xFF both extract the blue value from a color variable c but the later is faster.

This method has additional color functionality that is not reflected in the method’s signatures. For example, you can pass the name of a color (e.g. “green”, “mediumpurple”, etc). Look at the online “All About Colors” Python Ecosystem Integration tutorial for more information.

Underlying Processing method: blue

Signatures#

blue(
    rgb: int,  # any value of the color datatype
    /,
) -> float

Updated on December 25, 2023 16:36:33pm UTC

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