YouTube unveiled a new logo in 2017. Their latest logo removes the “Tube” from the red button and now features the play button. The new logo also features a bolder shade of red (#FF0000), which is the strongest red in the RGB color system.
For the latest YouTube brand resources including SVG version of the new logo and play button, you should check the official YouTube Brand Guidelines.
RGB: 255, 0, 0
|YouTube Almost Black|
RGB: 40, 40, 40
RGB: 255, 255, 255