Welcome to the forums @Duggy'sMom. I'm going to point you to some of @Ilkyway's pictures of items in Ultraviolet Dyneema, since I think these are some of the most color-accurate representations of the color in photos taken under a range of lighting conditions. Also, she uses Ultraviolet Cord Pulls on her bags, which are also close in color to Ultraviolet Dyneema:
Take a look at the photos in the start of her
Smart Alec versus Synapse 25 -> no endresult thread:
The shop-bag in the side pocket of the Synapse 25 is darker and more shadowed on top, and lighter at the bottom. You can also see the (de-focused) UV Dyneema lining of the Grey/UV Synapse 25 in the background, and the cord pulls on the bag:
Here's the same UV Shop Bag outside of the pocket, again with different amounts of incident lighting:

(Aside: I also carry a Shop Bag in the same front side pocket of Synapse 25 or Synapse 19, but I just roll it and don't secure it with a keystrap).
Here's one of @Ilkyway's pictures of the Standard Spiff Kit (UV Dyneema) in the bottom pocket of a Synapse 25. Again, you can see the color under a range of lighting (brighter at the left, more shadowed at the right), and with cord pulls. This picture was excerpted from
one of her posts in a review thread on the Standard Spiff Kit
For a slightly less accurate UV color picture of the same model Spiff Kit in a Pilot, see my picture:
The colors are close, but I'd say that @Ilkyway's color rendition of the UV Dyneema accessory is more accurate.
HTH
moriond