Colt 3540
$ 208 Original price was: $ 208.$ 158Current price is: $ 158.
A men’s rectangular frame in gunmetal/silver or navy/gunmetal. Tortoiseshell arms.
- Size: 58-18-150 mm, lens depth 39 mm
- Frame: Full Rim, Semi-rimless, Titanium
- Colours: Gunmetal/silver, Navy/Gunmetal
- Case & microfibre cloth included
- Lenses made in our UK labs
- Delivered across Australia
- Free 30-day returns
About the Colt 3540
Colt 3540 Prescription Glasses
Rectangular glasses add a little structure to the face without any fuss. The Colt 3540 is a men’s full-rim titanium rectangular frame, sized 58-18-150, in Gunmetal/silver or Navy/Gunmetal. You can order it with single vision, progressive or bifocal lenses made to your prescription. It is part of our Colt collection.
Gunmetal/silver or Navy/Gunmetal?
Gunmetal/silver. Gunmetal/silver mixes gunmetal and silver. It is a great match for cooler skin tones and a crisp, tidy look.
Navy/Gunmetal. Navy/Gunmetal pairs navy with gunmetal. It goes with almost everything and never draws too much attention.
Still torn? Think about what you wear on an ordinary weekday, not on a night out. That is the colour you will be happiest with.
About the Colt 3540 design
Rectangular lenses suit round and oval faces, adding a bit of definition. The tortoiseshell arms pair nicely with the front and give the frame a relaxed feel.
Titanium is one of the lightest frame materials around, which makes it a great choice for all-day wear.
It is the kind of frame that works with most outfits, which makes the Colt 3540 an easy pick for everyday wear.
How to wear it
Choose the darker colour for the office and the lighter one for a more relaxed look. Either way, it is an easy frame to wear every day.
Frame size and fit
| Brand | Colt |
|---|---|
| Frame | Full Rim, Semi-rimless, Titanium |
| Colours | Gunmetal/silver, Navy/Gunmetal |
| Frame size | 58-18-150 mm (lens width, bridge, arm length) |
| Lens depth | 39 mm |
| Designed for | Men |
With 58mm lenses, this is a larger frame that suits wider faces. The 18mm bridge is average. The 150mm arms are on the longer side, which suits larger heads. Across the lenses and bridge it measures about 134mm.
The easiest way to check is against glasses you already love. Most frames show their size inside the arm; if yours are close to these, you are in safe territory.
Lens options for the Colt 3540
Choose the lens type that suits how you use your glasses:
- Single vision: one prescription for distance, reading or the computer.
- Progressive: near, middle and far in one lens with no line. (In the UK they call them varifocals.)
- Bifocal: a defined reading area at the bottom of the lens.
- Ready readers: simple magnification for close work.
The 39mm lens depth gives progressive lenses plenty of room. If your prescription is on the stronger side, a thinner high-index lens keeps the edges neat, and an anti-reflective coating means fewer distracting reflections on screens and at night.
Ordering online is easier than you think
All you need is a current prescription from your optometrist and your pupillary distance (PD), the distance between your pupils. Your PD is often written on your prescription; if it is not, ask your optometrist for it. Pick your colour, choose your lens type, enter your details and add any lens upgrades. If you are not sure about sizing, compare the measurements above with a pair you already own. It only takes a minute and saves any guesswork.
Made for you in our UK lab
Once you have picked your colour and lens type and entered your prescription and PD, our UK optical lab makes your lenses, fits them into your Colt 3540 and sends the finished pair to you in Australia.
Looking after them
Wipe your lenses with a microfibre cloth rather than the hem of your shirt, keep them in a case when they are in your bag, and never leave them on the dashboard on a hot day. Our lens care guide has a few more habits worth picking up.
Questions we often get
Can I get progressive lenses in the Colt 3540?
Yes. The 39mm lens depth gives progressive lenses enough height for all three vision zones.
Is the Colt 3540 comfortable for all-day wear?
Yes. It is a lightweight frame, and a thinner lens for a stronger prescription keeps the weight down even further.
Is it a large frame?
Yes. With 58mm lenses it suits wider faces.
Who glazes my lenses?
Our own optical lab in the UK. Your lenses are made to your prescription and fitted into the frame before your glasses are sent to you.
Not quite the one? Take a look at our men’s glasses and prescription glasses.
Lens prices
Lens types
| Lenses | Single Vision | Bifocal | Varifocal |
|---|---|---|---|
| 1.5 Index (standard) | FREE | $40 | $69 |
| Transitions | $50 | $90 | $119 |
| Sunglasses tint | $10 | $50 | $75 |
| Blue light filter | $30 | $70 | $99 |
Basic 1.5 Single Vision lenses with anti-reflection coating are included in the frame price.
Thinner lens upgrades
| Lens index | Single Vision | Bifocal | Varifocal |
|---|---|---|---|
| 1.6 + HMC | $30 | $70 | $95 |
| 1.67 + HMC | $50 | $90 | $119 |
| 1.74 + HMC | $70 | – | $135 |
Higher index lenses are thinner and lighter, and are worth it for stronger prescriptions. All include an HMC coating.
Frame details & size guide
Specifications
| Color | Gunmetal/silver, Navy/Gunmetal |
|---|---|
| Eye Size | 58 |
| Brand | Colt |
| Lens Depth | 39 |
| Temple Length | 150 |
| Bridge Size | 18 |
| Type | Optical |
| Material | Titanium |
| Wearer | Men |
| Rim | Full Rim, Supra |
How to read frame sizes
The three numbers (for example 48-20-140) are the lens width, the bridge and the arm length in millimetres. Compare them with a pair you already own.

Delivery, returns & what is included
Delivery
- Single Vision: 5-7 working days
- Bifocal: 7-10 working days
- Varifocal: 7-10 working days
- Dispatched within 48 hours by tracked Royal Mail service
Delivery to Australia: the cost and your estimate are shown at checkout before you pay.
Returns & exchanges
Free 30-day returns or exchanges. If your glasses are not right for you, we will make it right.
What is included
- Anti-reflection lenses included
- Case and microfibre cloth
- Lenses made in our UK optical lab
- All frames CE marked
- Worldwide delivery
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