Easily shop OLO colors with our pre-selected Collections. Choose between OLO brush or chisel half-markers and replacement ink cartridges. Your markers will come ready to build. Colors are thoughtfully arranged, so each Collection size comprises the 128 OLO Collection. No repeats*, no missing colors. For example, all eight 16-piece Collections = the entire 128 color palette; all 32-piece Collections = all 128 colors, and so on. *The 16pc Gray Colors Collection 1 & 2 do not apply. Shop our Accessories page for additional Connector Rings, replacement nibs, and more.