To add onto what @spikeyxxx has noted (great analysis, by the way!), I took some screen captures during the video so I could directly sample those colors and translate them to matching HSV values in the current version of Blender (3.0.0 as of Dec 2021). Here are the HSV values I found that match the ones in the video for Blender 3.0.0:
Rocket Fuselage H 0.000 S 0.000 V 0.730
Rocket Accent H 0.026 S 0.872 V 0.761
Rocket Gray H 0.000 S 0.000 V 0.254
Rocket Glass H 0.579 S 0.731 V 0.815
Launch Pad Yellow H 0.083 S 0.822 V 0.701
Launch Pad Dark H 0.000 S 0.000 V 0.067
Launch Pad Mid H 0.000 S 0.000 V 0.254
Launch Pad Light H 0.000 S 0.000 V 0.565
For comparison, here are the values that were used in the video (Blender 2.8.0 beta, as I recall):
Rocket Fuselage H 0.000 S 0.000 V 0.850
Rocket Accent H 0.025 S 0.700 V 0.900
Rocket Gray H 0.000 S 0.000 V 0.500
Rocket Glass H 0.550 S 0.550 V 0.900
Launch Pad Yellow H 0.100 S 0.650 V 0.850
Launch Pad Dark H 0.000 S 0.000 V 0.250
Launch Pad Mid H 0.000 S 0.000 V 0.500
Launch Pad Light H 0.000 S 0.000 V 0.750
