As there are a few Darlingtonia in bud I thought I do a photo comparison of just a few of them to show the differences that when they are looked at singly may not be so apparent
On the left is "Venom" which has by far the largest buds. A very light pink tinge in parts.
Centre is Vulcan Lakes a red pitchered plant with the red continuing in the flower stem. The bracts are heavily flushed red as are the sepals.
Right is WR with the stem being red. A slight pink blush to the bracts
Othello which of course is green on green.( FG archive)
The 'Othello' open bud ( FG archive)
My FG1983 clone( above) beginning to show the pink suffused bracts ( below).