

Made to measure
Penumbra
Blackout curtains · Denim
4.82,192 Google reviewsMade to your windows — your written quote comes from the free home appointment, and the price quoted is the price you pay.
Colour: Denim
2 in this rangeFree home visitNo obligationWritten quote on the day
Your advisor will bring Denim to the visit so you can see it in your own light.
Measuring it yourself? See howStep 1: We visit
Samples at your window, every window measured
Step 2: We make it
Cut to your measurements in our workshop
Step 3: We fit it
Our own fitter installs and tidies up
- Price promise
- Rated excellent (4.8 out of 5 from 2,192 Google reviews, opens our Google profile)
- Fully guaranteed
- Finance options available
At a glance
The specification
Only what this range genuinely offers — anything we don't hold for it simply isn't listed.
- Category
- Curtains
- Types
- Blackout curtains · Eyelet curtains · Pencil pleat curtains · Pinch pleat curtains · Roman blinds · Thermal curtains
- Colourways
- 2 colours
Moisture suitability
Kitchen curtains
Colour families
- Blue curtains
- Yellow curtains
- Geometric blinds
- Geometric curtains
- Patterned curtains
- Yellow blinds
How it's made
How eyelet curtains work
Tap a number to see what each part does, and what you'll be choosing at your appointment.

1. Eyelets
Metal rings through the heading sit straight on the pole, with no hooks or gliders in between — very little to catch or snag.
Your advisor brings samples of every option to your window, so you can see and feel them before you choose.
Why this range
What Penumbra does well
Built as blackout curtains
Cut and finished as blackout curtains for your exact window, rather than trimmed down from a stock size. The mechanism is sized to the drop, so it hangs straight and stays that way.
2 colourways to compare
Colour behaves differently in north light, in the evening and against your walls. Pick the ones you like here and your advisor brings those exact swatches to the visit.
Chosen for real rooms
Customers most often put this range in bay window curtains, bedroom curtains, door curtains — which is a better guide than any spec sheet.
Style notes
What Penumbra is like, and where it works
Penumbra is a geometric print in navy and white, shown here as a roman blind and as pinch pleat curtains. The interlocking circle pattern reads as a fairly dense, tailored design that works equally well as a single window dressing or paired with a plain venetian blind.
A dark navy and white geometric print of interlocking circles, giving a lattice-like repeat pattern with a woven, textured finish.
Buying guide: Blackout curtains: linings, fit and a properly dark room · 9 min read
Suits these looks
Pairs well with
- pale or mid-toned wood flooring
- plain venetian or wood-look blinds
- muted blue or teal wall colours
Ideas for your home
Made-to-measure roman blind for a home office
Suits a room with dark wood furniture and a mix of jewel and neutral tones, where the blind becomes the main pattern against plain walls.
The dense geometric print gives a working space some visual interest without needing extra artwork.
Made-to-measure pinch pleat curtains for a dining room
Works well in a room with pale or mid-toned wood flooring and coloured walls, framing tall windows alongside a plain venetian blind.
The tailored pleat heading and bold print give height to full-length windows in a room used for entertaining.
Made-to-measure curtains for a bay window
Suits a bay window with a mix of painted and wood-toned furniture, where the pattern draws the eye along the run of the bay.
The repeat pattern reads clearly across multiple curtain widths, useful for wide or bay windows.
- Available as curtains (eyelet, pencil pleat or pinch pleat headings) or as a roman blind, so the same pattern can be used across different window types in one room.
- Comes in two colourways, Mimosa and Denim, both featuring the interlocking geometric print.
- Listed as blackout and thermal, so it is worth checking these properties with an advisor when discussing bedroom or living room use.
Reviews
What customers say about their blackout curtains
What reviewers mention most
- Outstanding service and quality consistently praised by customers.
- Quick installation and friendly, respectful staff enhance the customer experience.
- Wide range of materials available at competitive prices.
An automated summary of our Google reviews.
What reviewers mention most
- Outstanding service and quality consistently praised by customers.
- Quick installation and friendly, respectful staff enhance the customer experience.
- Wide range of materials available at competitive prices.
An automated summary of our Google reviews.
Make it yours
Tailored to your window
Nothing here comes off a shelf. These are the choices your advisor will walk you through, window by window, on the day.

In the room
Where Penumbra earns its keep
A made-to-measure curtain range, cut to your window and fitted by our own installer.
Chosen most often for
See it in real homesWhat happens next
Delivery, fitting and looking after it
We measure it, make it and fit it. There is no self-assembly step and no delivery you have to wait in for twice.
Measured by an advisor
Every window measured on site, so the finished drop is right rather than nearly right.
Made for your windows
Cut and hand-finished in our West Yorkshire workshop to the measurements taken on the day.
Fitted by our installer
Our fitter installs it, squares it up, checks the operation and takes the packaging away.
1-year guarantee
Follow the fabric-specific care label supplied with your order — most linings recommend gentle care to preserve drape and finish.
Good to know
Questions we get asked
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See Penumbra in your own light
An advisor brings the full range to you, holds the samples against your actual windows, measures precisely and prices the job on the spot. It costs nothing and there's no pressure to buy.
Penumbra
4.8(2,192 on Google)