Tongue Body Color:

1) Pale
Excess cold, especially if there is a thick white coating. 
Spleen qi deficiency, especially if thin white coating
Blood deficiency, especially if dull, pale face and lips

2) Red
Excess heat, especially if there is a thick yellow tongue coating. 
Yin deficiency, especially if tongue body is thin and coating is thin, absent or peeled.

3) Purple
Stagnant qi
Stagnant blood if dark purple tongue body and/or red spots on the tongue

What Does The Tongue Coating Look Like?

The tongue coating is normally thin and white. A pale yellow and slightly thicker coating at the back of the tongue may also be normal. The tongue coating often indicates the health of the spleen and stomach. It also provides a good indication of acute illness, such as colds and digestive problems.

1) Thick

2) Yellow, thick, glossy
Damp Heat

3) Dry, yellow
Excess heat

4) Peeled or absent
Deficient yin
Heart yin deficiency if it’s on the tip of the tongue
Kidney yin deficiency if it’s all over the tongue or at the back of the tongue and the tongue body is red.

What is the Tongue Shape?

The tongue shape is normally not too thick or thin, and the tongue body is smooth with no cracks. Changes in the tongue shape usually reflect chronic illness involving blood, qi, or body fluids.

1) Swollen or Puffy
Spleen qi deficiency, especially if teeth marks on the sides
Damp heat

2) Thin 
Blood deficiency
Fluid deficiency

3) Trembling
Spleen qi deficiency

4) Elongated
Heart heat

5) Sides Curled Up
Liver qi stagnation
If the sides are swollen and red, it may indicate Liver Fire

6) Cracks
Excess heat or yin deficiency
Heart imbalance, especially if there is a crack down the middle of the tongue to the tip