The cursed away kit is a phenomena that plays into the psyche of every football fan.
It's the superstition that forces unknown will inexplicably cause your team to fall apart on account of wearing an unfamiliar colour.
There were no such problems for Rangers on Sunday afternoon however as they were marvellous in mauve at Dundee.
Connor Goldson and James Tavernier led by example with two first half goals before Fashion Sakala added a late third in a 3-0 win.
That sent Giovanni van Bronckhorst's men into the semi-finals of the Scottish Cup where they'll join Edinburgh pair Hearts and Hibs – and either Dundee United or city rivals Celtic depending on how Monday night's last remaining quarter-final tie finishes.
Van Bronckhorst opted to throw in Aaron Ramsey for only his second start since joining on Deadline Day at the end of January.
Filip Helander, Jon McLaughlin and James Sands also reprised roles from the previous round.
But the first moment of action was a ludicrous passback call from Steven McLean – in which he believed Dark Blues defender Cammy Kerr deliberately shanked a clearance 40 yards to almost give up a corner.
It came to nothing but did little to divert the ever shining spotlight away from Scottish match officials.
But two minutes later came the early goal as a Tavernier corner delivery caused havoc.
Filip Helander rose above everyone and nodded down into the ground, beating everyone bar Lee Ashcroft who somehow got a toe to the ball and hooked off the line.
Unfortunately for him it was all for nothing as his clearance rebounded off the crossbar before falling directly to the other Gers centre-back, Goldson, who drilled home.
Morelos could have made it two when Goldson turned orchestrator of a smart Rangers move, dinking over the Dundee backline to Glen Kamara.
The Finn's smart one-touch layoff set up the striker who dragged well wide.
Next it was Ramsey to test young Dee keeper Harrison Sharp who batted away his powerful strike from a tight angle.
Those missed opportunities were almost punished when the home side got their first real sight of goal on 20 minute; Ashcroft sending a header wide from Niall McGinn's pinpoint set-piece delivery.
And moments later Rangers had their second as Tavernier burst into the area before being brought down by Ryan Sweeney.
The captain himself assumed responsibility from 12 yards and as is often the case with him, the task itself was a formality.
Sharp dived the right way but Tavernier tucked it far into the top-left corner.
He should have then turned provider but Morelos passed up another chance by diverting the right-back's cross into the away end instead of the back of Sharp's net.
Dundee clung on desperately as Morelos fresh-aired at a corner before Ryan Kent's low drive was then cleared off the line.
Mark McGhee watched on from home through Covid isolation. Presumably through his fingers, as the visitors looked like scoring every time they crossed halfway.
There was no European hangover to speak of. This was Rangers at their ruthless best and in all honesty McGhee's assistant Simon Rusk almost deserved some credit for going in at the break just two down.
Kemar Roofe and Sakala joined in at half-time for Morelos and Kamara, both given a well-deserved rest after their exertions against Red Star on Thursday night.
It was Sakala who made keeper Sharp live up to his name as he made an unorthodox save with his face to keep out a deflected effort.
Roofe then robbed Cammy Kerr and squared to Ramsey, who was denied again by an outstretched Dark Blue leg.
Sharp then stopped Roofe with a smart save before Kent meekly walked off after a tough tackle from Sweeney, to be replaced by Amad Diallo.
Sakala would then inexplicably blaze over from around six yards after being set up by Roofe, perhaps a sign of the away kit curse attempting to break through.
But it was banished for good when young sub Alex Lowry broke and slipped in Sakala, the Zambian this time cooly stroking into the far corner.
Here are three talking points from Dens Park.
Captain fantastic
Another game and another key contribution from Rangers' number two.
Whether James Tavernier raises a trophy come may – be it a league title, a Scottish Cup or even the hulking Europa League – remains to be seen.
But there's an argument to be made that he's having an equal or even better season than when he led the club to an unbeaten Premiership triumph last term.
Another perfect penalty had the Ibrox men on their way after whipping in the corner for the first goal and his service should have led to one or two more.
There's just no let-up from Tavernier who takes these busy weeks in his stride.
One big worry
Was Ryan Kent gingerly heading for the touchline midway inside the second half.
His intensity out wide set a standard for the whole team in the first half and along with Morelos he's a difference maker for the final stages of Rangers' three-pronged run-in.
His team just lost a little bit of zip when he headed off.
And whatever some made of the penalty award in the week it can't be denied he is a massive player in Europe as his displays against Dortmund and Red Star proved.
Van Bronckhorst will be hopeful there's no lasting damage done there.
Dee in the dumps
Even before the game the sparse Dens Park home crowd didn't give any inkling that an upset was on the cards.
Cup glory was always a long shot for the side lowest in the Premiership left in the cup at the quarter-final stage and survival is the top priority.
But the empty seats told their own story.
Save for one close shave at a set-piece Dundee just seemed to completely lack belief and things got worse when Lee Ashcroft, who was injured in the warm up against St Mirren in midweek, pulled up again by the sidelines.
Assuming he's feeling right after catching Covid, Mark McGhee will return to the Dens dugout against the same opponent next weekend as a straight shootout to avoid the automatic relegation place ensues between the Dark Blues and St Johnstone.
He'll finally be able to feel like he can sink his teeth into the job at hand but his team's last win remains under James McPake.
Rangers, Aberdeen and city rivals United are their final three fixtures before the split and that's a tough run.
This is a club in the mire at the moment and it's over to McGhee now to pull them out.
