Revealing mistake: When the strongman grabs the boulder, falls backwards, and it breaks through the floor tile, a clear rectangular pre-cut in the floor is visible - made to facilitate the stunt.
Continuity mistake: When Vesper is lying on the bed taking pictures, her light pink robe suddenly appears dark pink in the very next shot.
Visible crew/equipment: When Le Chiffre levitates the woman, after he conceals her hand, the metal rig used to lift her becomes visible in the top right corner of the screen.
Visible crew/equipment: When the truck crashes, a filming camera is visible on the left side of the frame.
Revealing mistake: During the casino fight, when Bond kicks a man, he is suddenly replaced by an obvious stunt double with much thicker hair.
Visible crew/equipment: Before Bond and Vesper walk through the secret door, nothing is cast in front of it. However, once the door closes behind them, a shadow - presumably that of the cameraman - is cast on it.
Revealing mistake: When the UFO releases the hovercraft, vertical creases are visible on the blue-sky backdrop behind it.
Revealing mistake: When the crowd watches the UFO, the group of people on the right can be seen through the now translucent tramp.
Visible crew/equipment: When Bond reveals the coffin containing the toupee, the stage lights are reflected on the glass dome to the left.
Visible crew/equipment: When James is visited in his chambers in the Scottish Castle by the "widow", someone is in the mirror as she enters. When she moves forward, and the film cuts back to her from James, the person is no longer in the mirror, even though the angle is the same.
Continuity mistake: When Bond, Moneypenny, his daughter, and his double are escaping from their prison cell, Moneypenny and Mata Bond are barefoot. When they are outside the cell, they both have their heels. They are never shown putting their shoes back on, and they wouldn't have had enough time anyway.
Continuity mistake: When Sir James and Mata Bond infiltrate Dr. Noah's headquarters, they hurry down a corridor with dozens of doorways. There are no flashing lights, but the corridor color repeatedly changes from blue with blue doors to red with red doors from one camera shot to the next.
Suggested correction: And exactly how would this have happened unintentionally? This was obviously done on purpose to create a disorienting, surreal effect. It may not be "realistic" but this is not a movie that concerned with realism.
Your attempt to speculatively explain it away as a stylistic choice does not negate the fact that this is a continuity error in a film that is full of continuity errors. It's important to remember that this film had 6 different directors, as well as disgruntled and uncooperative actors (Peter Sellers even quit and walked out in the middle of production). As a result, the movie has a piece-meal appearance and is riddled with plot holes and continuity errors.
Are you suggesting the two parts of the scene was directed by two different directors and one of them decided to change the color scheme before shooting? Considering the difficulty in creating the two different looks, it is practically impossible for this to have been done accidentally. A break in continuity is not a mistake if it is intentional.
Early in the sequence, Sir James and Mata Bond are looking for an escape route: They glance down one corridor, which is a dead-end that is all blue with blue doors; but they choose another dead-end corridor that is all red with red doors. As they flee down the red corridor, the camera cuts to show them from the front, back and profile as they hurry down the corridor. Although they deliberately chose the red corridor, the color changes from red to blue and back to red from cut to cut. The obvious answer is that they tried alternate takes Sir James and Mata Bond fleeing down the red corridor and then the blue corridor, but then sloppily edited the shots together into one sequence.
