If you're looking for an inverse of Illumina, the name of the genomics company, I'd play with its Latin roots: illuminare means “to illuminate” or “to light up.” The opposite would evoke darkness, obscurity, or concealment.
Here are some possibilities, depending on the vibe you're after.
🌑 Direct opposites
Name	Meaning / inspiration	Vibe
Obscura	Hidden, dark, obscure	Elegant, scientific
Tenebra	From Latin tenebrae, darkness	Mysterious, dramatic
Nox	Latin for night	Short, powerful
Caligo	Latin for mist, darkness, obscurity	Ancient, sophisticated
Umbra	Latin for shadow	Minimalist, memorable
Obnubil	From obnubilare, to cloud or obscure	Technical, unusual
Inlumina	A playful, negated twist on Illumina	Parodic, recognizable
🧬 If it's a parody or a rival genomics company
- Obscurina — sounds like Illumina's evil twin.
- DarkOmics — genomics, but in the shadows.
- Unillumina — almost literally the anti-Illumina.
- Confusio — where Illumina brings clarity, this brings confusion.
- Noctiluma — a fictional, night-themed biotech name.
- Obfusciomics — genomics that deliberately obscures things.