The most immature blood cell that is considered a plasma cell instead of a B cell is the plasmablast. Plasmablasts secrete more antibodies than B cells, but less than plasma cells.
Gentian Violet. Gentian violet is a water soluble dye (coloring substance) used primarily in medicine to stain bacteria, but also in other histological procedures. It is not derived from gentians, but got its name since it is pink-violet like some gentians in the genera of Centaurium, Gentiana, and Gentianella.
Blue is the colour between violet and green on the spectrum of visible light. Human eyes perceive blue when observing light with a wavelength between 450 and 495 nanometres. Blues with a higher frequency and thus a shorter wavelength appear more violet, while those with a lower frequency and a longer wavelength gradually appear more green.