I can try and help if you'd like, Phoe xd
1) The colour lilac was something everyone wore and this boy was no exception. He donned a sleeveless tailcoat coloured in the shade of lilac. The coat itself was fitted perfectly to his body, accentuating every detail and every curve of muscle on his torso. The coat was like a flower field completed with flowers in only the shade someone could only describe as heliotrope an hour before the break of dawn. On the right front pocket of the tailcoat lay the school emblem in black thread, proudly highlighting the small detail on the beautiful tailcoat. Underneath, he wore a simple white polo. The shirt looked clean; it had that freshly washed appearance. Even though the shirt was white, it had the gentle purple pigment colouring it to a light lilac which contrasted with the dark blue tie he had encased around his neck.
To finish his outfit, he wore midnight blue jeans with a mahogany brown belt which was tight around his waist. Those denim blue legs were two-a-penny downtown, like some uniform for those who couldn't wait to get out of the prescribed polyester blazers of the local comprehensive school. So to be honest, it couldn't have been the faded jeans, worn thin at the knees that made him stand out. To complete everything off, he had mahogany shoes that matched his belt; the shoes also had a lilac underside complete with the school's emblem repeated in black.
Or if you don't like my version:
A sleeveless lilac tailcoat with a front pocket on the breast, which included the school emblem on. Underneath a white polo shirt with a purple pigment was visible which lay behind a dark blue tie wrapped around the collar. He wore long midnight blue jeans that had a mahogany brown belt that looked tight around the waist. His shoes were mahogany with lilac underside; the school’s emblem on it in black to complete the entire outfit.
2) For the most part it was quite difficult to determine the age of this boy. He was too skinny to be full grown; his muscles stretched over his recently enlarged skeleton. Yet neither was he a young teen, the swagger of the later teens fully in place. He moved like a guy gaining a sense of surety in himself and perhaps that was the most dangerous phase of all - physically competent without the experience to know when to show restraint. He wore a hooded lavender shirt with three stripes of a darker purple, cerulean and xanthous. The colours contrasted themselves in a way that made everything about them stand out, quite like the boy who wore them.
The onyx jacket was designer all the way, even down to the faux-distressed look of the fabric. It was faded and ripped, but perfectly so, and made all the more obvious by the new perfect stitching in rusty coloured thread. He was like the type of guy you'd fall in love with, no matter how many beer bottles were in his system, and no matter how many other leather jacket, aching, lonely hearts wander around him. His charisma was embedded on his gorgeous facial features- green eyes and all- and when his lips curved up, they formed two small dimples sitting upon his cheeks. His favoured jacket had an achromatic star on the back, the only colour that hadn't changed in hue in all the years he had worn the jacket.
He looked like he came from an underground concert from the 90's. Worn and torn jeans covered his legs in the colour of a darkened cyan. He also wore black trainers with two vertical mauve stripes on the outer side, the same lavender underside as many of the other kids wore.
Or if you don't like my version:
He wore a hooded lavender shirt with 3 long stripes: purple, blue and yellow. The colours contrasted themselves like the way the boy who wore them contrasted many of the personalities of people around school. He also wore a onyx-black jacket with a pure-white star shape at the at the back. Dark cyan trousers and black trainers with two verticals purple stripes on the outer side, and a lavender underside.
3) He was a good looking boy; but it was more than that. He was quiet, but not out of painful shyness. It was a reservedness, like a conscious choice to observe the lie of the land before he got involved. Yet he wasn't stand-offish, he remained friendly faced and welcoming in body posture. It wasn't like he sat down one day and planned to be like that, it's just the way he was. No one had ever seen him go out and deliberately make a friend, they just came to him. There was nothing threatening about him, nothing at all. He was an easy listener, a good audience, giving encouraging feedback laced with intelligent comments. He worked hard, he got his work done. Only once in a while would he sink into a sulk over getting some school work wrong, it didn't happen to him often, and he had poor tolerance for the feeling when it did.
So there he stood again, further away from the crown in a galactic shirt with short sleeves, ascending lunar node in the centre. The colours were faded along with the shirt which looked like it had been picked up in a vintage store in one of the back boxes that everyone forgot to check. He was different to most. Freckles decorated his cheeks and a few sported themselves on his arms and legs in lighter hues. He wore onyx shorts, something his friends didn't like. His socks were high and had a rim of gold around the edges, something you could only just see above the equally tall galactic boots he wore that were decorated in a diagonally decorated laces pattern, small and glittering diamonds hanging off them.
He also donned a long translucent cape with the same galactic effect and golden rims, something no one at his school really understood. There was also a diamond pendent that rested on his chest and on the left of his face, a Lilith earring.
Or if you don't like my version:
There he stood, with a galactic shirt with short sleeves, ascending lunar node in the centre. The colours were faded along with the shirt which looked like it had been picked up in a vintage store in one of the back boxes that everyone forgot to check. He was different to most. He wore onyx shorts and socks, something not many of his friends did. The socks had a golden rim at the top, something that could only be faintly be seen if you looked at the top of the long galactic boots stretching high with laces, and diamonds dangling off. He also donned a long translucent cape with the same galactic effect and golden rims, something no one at his school really understood. There was also a diamond pendent that rested on his chest and on the left of his face, a Lilith earring.
I wasn't sure which tense you were using so I just used past tense. Hope this helps!