A little more that thatThey looked like humans with oily skin. Or sometimes not oily. That's about the extent of what TOS Klingons looked like.
![ywtLjsJ.png](https://i.imgur.com/ywtLjsJ.png)
With these guys they were going for alien, exotic and a little threatening'
![yhgsk6Z.png](https://i.imgur.com/yhgsk6Z.png)
These two look you dad's friends or a Folk duo from the 60s