Full-Saturation Hue Bars — Colour (512px)
Vertical bars sweeping the full hue circle at maximum saturation, paired with a greyscale version that shows how colours of different hues collapse to similar greys.
Specifications
- Width
- 512
- Height
- 256
- Mode
- RGB
- Color Space
- sRGB
- Seed
- 0
What is a .png file?
PNG (Portable Network Graphics) is a raster image format using lossless DEFLATE compression. It supports full 8- or 16-bit-per-channel truecolor, palette, and greyscale modes with an optional alpha channel, but no animation. It is the standard choice for screenshots, logos, and graphics with sharp edges or transparency.
How to use this file
Use an example PNG to test image decoders, alpha-compositing, thumbnail generators, and format converters, or to verify that a pipeline preserves transparency and color depth on round-trip.
Related files
- png16-Step Grey WedgeA 16-step greyscale wedge from pure black to pure white, for testing tone reproduction, banding, and monitor calibration.
- png50% Grey CardA flat 50% grey card (rgb 128,128,128), a reference for white balance and exposure testing.
- pngFruit Still Life — Colour (512px)A colour fruit still life (apple, orange, banana, grapes), paired with a true-greyscale conversion — a real-world subject for testing desaturation and how distinct hues collapse to similar greys.
- pngFruit Still Life — Greyscale (512px)True 8-bit greyscale conversion of the fruit still life, the paired reference for testing colour-to-grey conversion.
- pngGradient Composition — Colour (512px)A smooth three-channel gradient composition, paired with its greyscale conversion to test luminance handling.
- pngGradient Composition — Greyscale (512px)True 8-bit greyscale conversion of the gradient composition, the paired reference for testing colour-to-grey conversion.
Generated by generation/images_greyscale.py. Free for any use, no attribution required — license.