Worked on the vega-lite repository to enhance documentation accuracy for heatmap color defaults, focusing on aligning the stated defaults with those in the underlying Vega library. Addressed a documentation bug by updating the described default color scheme from 'viridis' to 'yellowgreenblue', ensuring users receive correct information and reducing potential confusion. Utilized Git for version control and JavaScript for understanding the codebase, while applying best practices in technical documentation. The update improved cross-repository consistency and is expected to decrease user support requests related to heatmap configuration. Demonstrated attention to detail and effective collaboration across documentation and parser configuration references.