I think Turbo Blue is a good choice - TBH I'm not that keen on the Dew Silver - I had to order mine about 15 months ago before any samples were at the dealers so the colour was ordered sight unseen. Dew Silver is just a flat very light grey - how anyone could discern any silver in it (ie any metallic sheen) is beyond me. But it's OK and some people seem to like it.
On the car more generally? I'm really not the best person to ask because I'm inclined to be over-critical even of cars I quite like

so bear that in mind. For me, the SB wins absolutely hands-down over the regular Q3 for looks. Basically I ordered it as the closest match I could find to my ideal car at the time of ordering - a reasonably powerful 4WD compact (eg 4.4m) crossover with decent tech and reviews. Personally I don't like larger cars (eg Q5 would be too big) but probably anything smaller than Q3 would involve too many compromises. So against that spec then yes I'm pretty happy with it. I think the SB is the best-looking of any similar crossovers out there (though must admit that I'm wondering about the new Cupra Formentor, but haven't seen one in the flesh yet). My 3 main points of critique would be:
1. I really wanted the extra power that would be in an SQ3, which Audi just don't seem to be producing as yet, though there is a new S3 I see, so maybe... RSQ3 as new is probably overpriced and has serious early depreciation so I don't feel tempted by that. But again the Formentor is closer to the mark. The 45TFSI is fine for performance, especially with the gears in S, but obviously doesn't have that extra edge that would come with a 300bhp engine.
2. I'm personally not into wheel porn and would much rather have had the slight extra ride comfort from 19" wheels rather than being forced to have 20".
3. I don't feel that the dash design had enough time/budget spent on it. The controls are scattered around - sometimes apparently at random - in various places and I still occasionally struggle to remember exactly where a particular function might be. What is that boot release doing on its own on the driver's door? And why that curious and unappealing chunk of unused blank space between the volume knob and start button?
TBH I do feel the Formentor calling for a test drive though in the New Year for me personally, but I suspect that you'll be happy with the SB.