Grass lacking dark green

[Norbetow]

I planted fescue at a few house in the fall and used fertilizer with a high middle number to help roots. Then I fertilized in early March with high nitrogen. Then killed weeds a few weeks later. The grass is growing really really fast. Its tall, thick, and healthy. But it is green and not dark green. So I added some more fertilizer with high nitrogen, and it still hasnt gotten darker. What is the best thing to do now? Thanks

[Walliz]

Just wait I guess, fertilizer with high nitrogen should help. Can you post a picture so I can see if something else is needed?