About

This tool addresses the complexity of modern CSS background syntax, specifically for gradients and procedural patterns. While browsers render gradients using the linear-gradient or radial-gradient functions, manually calculating color stop positions, angles, and transparency values often leads to syntax errors or visual inconsistencies. This generator creates production-ready CSS code, handling the mathematical interpolation between color stops automatically.

The interface abstracts the vector math required for gradients. For instance, calculating the trajectory of a gradient line at a specific angle θ requires trigonometric adjustments to ensure the gradient fills the container box B. This tool manages these calculations, along with color space conversions (HEX to RGBA), ensuring that the generated code is compliant with W3C standards and cross-browser compatible.

Formulas

The mathematical model for a standard linear gradient interpolates color C across a line defined by angle θ.

linear-gradientθ,n∑i=0C_i at P_i%

Where C_i represents the color at stop i, and P_i is the position along the gradient line (0% to 100%).

Reference Data

Gradient Type	Syntax Structure	Use Case	Performance Impact
Linear	linear-gradient(angle, stops...)	Headers, Buttons, Sections	Low
Radial	radial-gradient(shape at position, stops...)	Spotlights, Vignettes	Low
Conic	conic-gradient(from angle at position, stops...)	Pie Charts, Color Wheels	Medium
Repeating	repeating-linear-gradient(...)	Stripes, Warning Tapes	Medium
Solid	background-color: #HEX	Fallbacks, Flat UI	Negligible
Hard Stop	color 50%, color 50%	Sharp lines, Flags	Low
Transparency	rgba(r, g, b, alpha)	Overlays, Glassmorphism	Medium (Composite)

Frequently Asked Questions

The gradient line length changes dynamically based on the container's aspect ratio and the angle. The browser calculates the start and end points such that the color stops are distributed along a line that passes through the center and ensures the corners of the container are covered.

Banding (Mach bands) occurs when there are not enough available color bits to render smooth transitions, often in dark gradients. To mitigate this, you can add slight noise or use colors that are mathematically further apart in the RGB spectrum.

CSS gradients have poor support in many email clients (like Outlook). It is safer to use the "Download PNG" feature of this tool to generate a raster image for email templates.

Linear gradients transition colors along a straight line. Conic gradients transition colors around a center point, creating a sweeping effect similar to a pie chart or color wheel.

Yes. This tool uses RGBA values. If you select a color and lower the opacity, the generator outputs `rgba(r,g,b,a)` syntax instead of Hex codes.