This example demonstrates a color gradient mapped onto a series of rectangles using a logarithmic scale. It uses D3.js to create an SVG visualization, with `d3.scaleLog` and `d3.scaleLinear` defining the value-to-position mapping, while a custom log-based color scale assigns a range of three colors across the domain. The visualization also includes a bottom axis with `d3.axisBottom` and tick formatting, all rendered within an HTML page.