Patio grout paint

[Phil66]

Hello folks, 

We had a patio and path put in at our static caravan. Due to natural levels, being on a slope and having to fit in with some decking steps already there, the path is higher than the grass until it gets towards the bottom at the road. 

 

The person that cuts the grass with a tractor mower drives along the front of the caravans so a couple of the slabs came loose, we've put a half round curb in now which has stopped it happening but when the bloke re-laid the slabs he didn't have any of the brush in grout (if that's what it's called) that he used originally, so used some stuff out of his van which is very light, the rest is dark grey. He's a lovely old bloke and we left him to do while we weren't there, he didn't want paying so I feel bad asking him to sort it. I don't think you can get patch up packs of the brush in grout so did anyone know if there is some kind of paint I can use to try and get a close match? 

 

Cheers