Construction colour codes for safety helmets begin in white and range through a prism of relative denominations right down to Yellow, which is the lowest of the low in regards to ability, creativity, intellect or artisanal training of any sort. They are the Go For's, they are dispensable, superfluous easily replaced, the glut, surplus to requirements, worker bees, drones, yellow jacket's, yellow pages, fast found, freely dismissed, tidal debris, if one could read the invisible ink in the thought bubble's over the Do Ron Ron's head.