Indicate the ink location (where you have applied it) and the color. It is highly desirable to consistently ink the specimen in terms of color in relation to specimen orientation. Below is a recommended color scheme:.
Blue for superior (sky above is blue)
Green for inferior (grass below is green)
Black for posterior or deep (deep and away from the light is back)
Red for medial aspect (where the heart is close)
Yellow for anterior (well-lit and bright)
Orange for lateral (by default)
When only 2 or 3 colors are needed, black, blue and orange are preferred.