Fills individual geographic zones using the target color scale to verify boundary contrast and regional spacing.

Examines high-frequency boundaries and neighboring color adjacency across tessellated cells.

Evaluates multi-row grid alignment and step intensity mapping to test readability of numerical data clusters.

Inspects overlapping node markers and alpha transparencies under the selected deficiency.

Tests simple categorical proportions and value distinction in horizontal series blocks.

Validates continuous stacked wave shapes and smooth color transitions along organic spline contours.

Validates continuous multi-peak kernel density estimation curves with smooth, high-fidelity color gradients.

Examines 2D bivariate continuous gradients and hexagonal density bins for continuous color scales.

Tests relationship arcs and circular cross-group flow ribbon contrast between communities.

Validates node community clusters and inter-group network edge differentiation.

Tests text readability, weight variations, and label distinctions across different color assignments.