compression
Color banding
Color banding creates visible steps in smooth gradients when compression reduces available colors.
What is Color banding?
Color banding is a compression artifact where smooth color gradients appear as visible discrete steps or bands instead of continuous transitions. This occurs when lossy compression reduces the number of distinct color values used to represent gradients, causing neighboring gradient values to become identical rather than slightly different.
Importance of Color banding
Color banding ruins the visual quality of images with gradients like skies, sunsets, and studio backgrounds, making them appear unprofessional for web, social media, and email use. Understanding how to prevent color banding ensures your compressed images maintain smooth transitions and professional appearance across all platforms.
Color banding in Practice
A photographer compresses a sunset photo with a smooth orange-to-purple gradient at JPEG quality 50. The original gradient contains thousands of subtle color variations, but the low quality setting reduces this to only dozens of distinct colors, creating visible bands across the sky. The same image compressed at quality 75 retains smooth gradient transitions because more color values are preserved during compression.
Color banding Best Practices
- → Compress JPEG images at quality 65 or higher to prevent banding in gradients.
- → Use WebP quality 60 or above when converting images with smooth color transitions.
- → Always compress from the original high-quality source rather than recompressing banded files.
- → Export from RAW files at higher bit depths when possible to preserve gradient precision.
Example of Color banding
Related Terms
Frequently Asked Questions
What is color banding in images?
Color banding is a visual artifact where smooth color gradients appear as visible steps or bands instead of seamless transitions. It occurs when image compression reduces the number of available colors below what's needed to represent smooth gradients. This commonly affects skies, sunsets, and studio backgrounds in compressed photos.
How to fix color banding in JPEG images?
Fix color banding by compressing from the original source file at a higher quality setting, typically 65 or above for JPEG formats. Never try to fix banding by recompressing an already-banded image, as this will only make the problem worse. Always start with the highest quality original file available.
Why do my compressed photos show stepped colors instead of smooth gradients?
Your photos show stepped colors because the compression quality setting is too low for the image content, causing the algorithm to remove too many color values from smooth gradients. This typically happens with JPEG quality below 65 or WebP quality below 60. Increasing the quality setting preserves more color information and eliminates the banding effect.