Darkening an image block

Site URL: https://hypersphere-parsnip-zhhw.squarespace.com/vision

Hi 

I am trying to make 1 image darker with an overlay and I can't seem to get the code right:

#block-3e8390006077bf2ae14b .sqs-block-image {
  filter: brightness (.5) !important;
}

I'm trying to target the middle image with the flowers.

Any help appreciated!

https://hypersphere-parsnip-zhhw.squarespace.com/vision

pw: peekaboo

Thank you!

You missing some character/symbol. Use this

div#block-3e8390006077bf2ae14b img {
    filter: brightness(0.5) !important;
}

You're the best! Thanks Tuan!