looks great too me.. Especially if your light is in the 3-3500k spec. Too dark is bad.. Yellow is Bad.. In between yellow And too dark.. Is about 50 different shades of green that I'd say are "healthy".
I show link.. not a great picture or the best looking plant.. But it shows the Variation in Leaf/foliage color and how yellow leaves.. Good work and keep it up. your plant looks great.