radialgradientcircle

Radialgradientcircle is a concept in computer graphics and web design describing a radial gradient that fills a circular region. The gradient radiates color from a central point toward the perimeter, producing a circular glow or vignette.

Definition and form: A radial gradient is defined by a center point, a radius, and a sequence of color stops. When the gradient is constrained to a circle, the fill is circular rather than elliptical, yielding a smooth transition from center to edge.

Implementation: In CSS, a circular radial gradient can be declared with radial-gradient(circle at 50% 50%, color1, color2 70%, color3 100%). The circle keyword fixes the shape, and the position places the center. In SVG, a radialGradient element uses cx, cy, r and optional fx, fy to adjust the focal point and radius; colors are defined via stop elements. In canvas, a gradient is created with createRadialGradient(x0, y0, r0, x1, y1, r1) and used as a fill style to shade shapes.

Applications: Radialgradientcircle is used for backgrounds, glow effects, button illumination, radar-like visuals, and shading in both raster and vector artwork. It is common in user interfaces to simulate light, depth, or emphasis around a focal point.

Notes: The appearance depends on the coordinate system, color space, and the chosen color stops. Performance considerations may arise with large canvases or numerous color stops, but the technique remains a standard tool for circular light and color diffusion. See also radial gradient, linear gradient, and conic gradient for related effects.