Create a full-page coloring page featuring the historical Figueroa Building on Olvera Street, rendered in simple light greyscale line art. The intricacies of the architecture should be highlighted, showcasing the blend of Mission Revival and Spanish Colonial Revival styles. In the foreground, the cobblestone pathway of Olvera Street, bustling with activity, must be depicted using textured lines, while in the background, the distinct ornate facade of the Figueroa Building should stand prominently. Arched windows, decorative tiles, wrought-iron railings, and the prominent signage should be outlined with delicate precision, allowing for intricate coloring. Additional elements like street lamps, benches, and market stalls could be added for richness, maintaining a balance of complexity for an engaging and stable diffusion coloring experience. The whole scene should be unified with gentle shading to define depths and to emphasize the nostalgic atmosphere of this historical location, offering a coloring page that is both captivating and calming for the adult audience --ar 17:22 --s 50