Roses Aren’t Red

I write greeting cards for a living.
Valentine’s Day is a way’s off, but it takes months to come up with new cards and get them printed in time.
Plus, stores are putting cards out earlier and earlier every year.
After sitting at my desk for a week, the best I could come up with was a heart in greyscale.
Inside the card:
Roses aren’t red.
And violets aren’t blue.
I’m colorblind, jerk.
If it gets rejected, I’ll just sell it to an online freebie greeting card company.
Sure, it’s cutting my own throat, but my art must be appreciated.