New Ultralytics Colors() Palette

[glenn-jocher]

🛠️ PR Summary

_{Made with ❤️ by Ultralytics Actions}

🌟 Summary

Optimization of the color palette used in YOLOv5 visualizations.

📊 Key Changes

• Switched from using matplotlib's pre-defined TABLEAU_COLORS to a custom Ultralytics color palette.
• The custom color set is hard-coded directly into the Colors class initialization.

🎯 Purpose & Impact

• 🏞️ Ensures a more consistent and distinctive Ultralytics branding across visual outputs.
• 🎨 Provides a wider variety of colors, potentially improving the clarity and aesthetic of plotted data.
• ℹ️ Users will see visualizations that feature these new, predefined colors, which could enhance readability and user experience.

[glenn-jocher]

/rebase

[glenn-jocher]

@SergioSanchezMontesUAM @kalenmike @SkalskiP we have our new official Ultralytics Color Palette by Alex now ⭐!! You can start implementing this palette in our website and app. There are 20 colors (for classes 0-19) which are restarted once they are cycled through, i.e. classes 0, 20, 40 use the same color, as do classes 5, 65, 305, etc.

class Colors:
    # Ultralytics color palette https://ultralytics.com/
    def __init__(self):
        self.palette = [self.hex2rgb(c) for c in matplotlib.colors.TABLEAU_COLORS.values()]
        # hex = matplotlib.colors.TABLEAU_COLORS.values()
        hex = ('FF3838', 'FF9D97', 'FF701F', 'FFB21D', 'CFD231', '48F90A', '92CC17', '3DDB86', '1A9334', '00D4BB',
               '2C99A8', '00C2FF', '344593', '6473FF', '0018EC', '8438FF', '520085', 'CB38FF', 'FF95C8', 'FF37C7')
        self.palette = [self.hex2rgb('#' + c) for c in hex]
        self.n = len(self.palette)

    def __call__(self, i, bgr=False):

The full list in RGB is here:

colors.palette
Out[2]: 
[(255, 56, 56),
 (255, 157, 151),
 (255, 112, 31),
 (255, 178, 29),
 (207, 210, 49),
 (72, 249, 10),
 (146, 204, 23),
 (61, 219, 134),
 (26, 147, 52),
 (0, 212, 187),
 (44, 153, 168),
 (0, 194, 255),
 (52, 69, 147),
 (100, 115, 255),
 (0, 24, 236),
 (132, 56, 255),
 (82, 0, 133),
 (203, 56, 255),
 (255, 149, 200),
 (255, 55, 199)]