> ## Documentation Index > Fetch the complete documentation index at: https://learn.biq.li/llms.txt > Use this file to discover all available pages before exploring further. # Customize QR code styling > Style QR matrices, eyes, frames, colors, and gradients. You can style the QR matrix, eye frame, and eye. Each supported part can use a solid color or a gradient with start color, end color, midpoint, and one of eight directions. **Apply to all** creates a hierarchy. When enabled on the matrix, its color treatment also applies to the eye frame and eye, so their color controls are disabled. When enabled on the eye frame, the same treatment applies to the eye and its color control is disabled. Style shapes independently unless an apply-to-all option is enabled. Keep strong contrast, preserve a quiet margin, and test the final design with several cameras. QR code styling controls placeholder ## Configure a solid color Select the matrix, eye frame, or eye and choose **Solid**. Enter or pick a color with strong contrast against the background. Very light modules can fail under glare or low-quality printing. ## Configure a gradient Choose **Gradient**, set start and end colors, select one of the eight supported directions, and adjust the midpoint where offered. Test the lightest area of the gradient because every required module must remain distinguishable. ## Understand apply to all * Matrix apply to all controls matrix, eye frame, and eye colors. * Eye-frame apply to all controls eye frame and eye colors. * Disabled dependent controls show that their value is inherited. * Shape controls remain independent unless the editor explicitly links them. Preview is not the final reliability test. Download the code, scan it at small and large sizes, and test a print proof before mass production.