yeah u have plenty of N in there. notice how they are darker green like that, means u have plenty of N. i wouldnt worry about it unless u start to show some other problem along with it.
u may want to cut down on the nutes a little tho, i see some signs of nuteburn.
i looked on my week old, it has purple stems that split after the coyl's but have lot of hairs on them, so i think its fine, but im not sure, the plant is doin great leaves not droopy just a tad tilted up doin good but the a green/purple mix of stem