What can I mix with lavender in a new narrow bed?

[Geometric]

We’ve got new narrow beds on each side of a path, kind of embedded raised beds. Keen to have lavender but want to mix it with one or two other plants so it’s less uniform. Position is pretty much full sun, on a clay soil (though as they’re raised beds they’ve got a good amount of topsoil in). Would rather have tonal colours - purpled, deep pinks, reds rather than high contrast like white. And similar-ish heights I guess. Any suggestions? I’m on a steep learning curve here! TIA

We have Scabious which I like. It has an exceptionally long flowering period if you dead head regularly and it is otherwise low maintenance. We have the butterfly blue which looks lovely with the lavender.

I'd go for a low ground cover plant like aubretia and/or phlox and add interest and colour with deep pink peonies, maybe some alliums and spring bulbs for earlier in the year.

Aquilegia too on top of the spring bulbs, so thst it will pop up when the bulbs retreat but the foliage still needs to collect sunshine.

How about some poppies? My yellow Welsh poppies are looking great next to the bluebells, but you could go for a colour more suited to your palette.

How about Cosmos or Cosmea? They're not fussy and seem to grow anywhere. You can get all sorts of colours, white but also pinks, soft and brighter darker types. They get quite leggy if they don't have full sun.

If you’d like some more plants that smell lovely, to go with the lavender, then a trailing rosemary will dangle nicely over the edge of the raised bed and have loads of pale lilac flowers. You can use it in cooking too. Thyme also has purple flowers and smells lovely in the sun.
Clove pinks and carnations love hot sun, although they prefer a chalky soil. Aubretia in pink, red or purple provides loads of ground cover and will also dangle over the bed wall.

Heuchera is great.

There are lots of purple and silver Hebes which look great with lavender

Creeping thyme to grow in amongst/in front of the lavender? They come in various pink and white flower colours

Erigeron might be nice there, it comes in all kinds of shades through pinks and purples, and loves a good blasting of sun. Mine is flowering already and it won't stop till autumn. The foliage might be a bit samey with lavender though.

Helianthemum are also fantastic sun loving spreaders, and come in all colours. I love them!

Lithodora might work, Heavenly Blue is gorgeous, but there are more purple ones to be had.

Ooo yes to Mis Wilmotts ghost. I might put that with my lavender

For some summer colour I'd go for some ivy-leafed pelargoniums dotted in among the other plants. Strong deep pink perhaps?

Maybe heuchera, thyme (a big ball of thyme would be quite useful), salvia, sage, catmint?

Wow thanks, there are loads of ideas here, a fair few that I’ve not heard of so will get googling!

Thought I’d come back and tell you what I ended up choosing!

Munstead lavender

Eryngium picos amethyst - love this

and Salvia sensation rose

Will be planting up next weekend! Thanks again for all the suggestions - I still have more borders to sort, so have saved pictures of hebes and cosmos and echinacea for another area.

Shameless place marking so I don't loose all these great suggestions!