abstract backdrop background canvas color colour colours grunge hand hues palm pastel pattern patterns rough shades skin texture textures tones building concrete crane engineer engineering foundation hard hardness infrastructure maintenance metal progress rubble strong structure tough winch work worker working aged dirty ink journal lined messy note notebook paint paper school spatter spill splat splatter stained supply block blocks cloth colors fabric patch patchwork quillt quilts series tints variations beam city column construction equipment excavator gear landscape pillar sand scene strength arts collage crafts grungy leather notes scrapbook scrapbooking scraps stain tattered torn vintage