What does lymph actually look like?
This seems to be one of rare actual photos of lymph online (suggested in the comment above):



Image: Lymph (source: IJCRI - Case Reports Journal)‎

This particular lymph (or "lymph fluid" or "lymphatic fluid") was aspirated from a "lymphocele", which is an abnormal collection of lymph in the body (appearing outside of the normal lymphatic system).

While a lymphocele is not normal, the lymph in it, such as in this photo, looks quite normal: it is a clear (translucent) and yellowish liquid. 


  The lymphatic (lim-FAT-ik) system is a network of tubes that collects
  lymph (LIMF). This clear, pale yellow fluid drains out of blood
  vessels all over the body. (KidsHealth.org)


The froth is from proteins as they normally appear in the lymph.

The image of lymph in Wikipedia is not a clear lymph, but obviously a chyle (a milky fluid containing the lymph and chylomicrons due to thoracic duct injury).