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The Ray-Ban RB3751CH sunglasses bring together modern square styling and Ray-Ban's most advanced lens technology. The "CH" stands for Chromance—a premium polarized lens system engineered to enhance contrast, sharpen visual detail, and make colors appear richer and more separated than standard polarized lenses.
What Makes Chromance Different
Chromance is Ray-Ban's high-tech lens technology that uses a revolutionary pigment to enhance contrast and render nature's colors like never before, calibrating light to make the color spectrum clearer and brighter while eliminating glare. The lenses feature a multi-layer AR coating to reduce blur and are made of polycarbonate, meaning they're lightweight and impact resistant. A hydrophobic treatment repels water, keeping your vision clear in wet conditions—ideal for boating, fishing, hiking, or any outdoor pursuit.
Unlike standard polarized lenses, Chromance lenses amplify colors and improve contrast to ensure a more vibrant view of the world around you. Chromance lenses filter light at shorter wavelengths more than other lenses, reducing the blue component slightly so that certain colors such as red and green appear particularly bright and clear. The result is a sharper, more detailed outdoor experience—you'll notice textures in foliage, ripples on water, and subtle color shifts that standard lenses wash out.
Frame Design & Fit
The RB3751CH has a clean, angular square shape that works for both men and women. The frame features a dual top bar and slender temples embellished with six horizontal grooves near the hinges that add visual intrigue. The front is metal (stainless steel), while the temple tips are propionate for comfort behind the ears. Adjustable nose pads allow a customizable fit, so the frames sit securely without pinching.
Available in four distinct finishes—polished black with dark grey or mirror blue lenses, copper with brown polarized lenses, and gunmetal with light blue polarized lenses—each combination offers a different look and lens tint optimized for specific light conditions. The Ray-Ban logo is etched on the lens and embossed on the temples. Two sizes are available: 58mm (standard) and 61mm (large), with a 17mm bridge and 145mm temples.
Prescription-Ready & UV Protection
These sunglasses are fully prescription-ready. You can add single-vision or progressive prescription lenses while retaining the Chromance polarized performance. All lenses block 100% of UVA and UVB rays for complete eye protection. The full-rim metal construction provides excellent lens security and durability for daily wear.
If you spend serious time outdoors and want polarized sunglasses that go beyond glare reduction to actually enhance what you see, the RB3751CH Chromance delivers. The combination of Ray-Ban's heritage design and cutting-edge lens technology makes these a standout choice for anyone who values both style and optical performance.
Product Details
Product DetailsModel
0RB3751CHShape
Gender
Material
Bridge Type
Rim Type
Age Group
Color Details
Color DetailsFrame Color
CopperColor Code
9259ANColor Description
CopperLens Color
Polar BrownLens Features
polarized
Frame Color
CopperColor Code
9259ANColor Description
CopperLens Color
Polar BrownLens Features
polarized
Frame Color
BlackColor Code
002/K8Color Description
BlackLens Color
Polar Dark GreyLens Features
polarized
Frame Color
BlackColor Code
002/4LColor Description
BlackLens Color
Polar Grey Mirror BlueLens Features
polarized
Frame Color
BlackColor Code
002/K8Color Description
BlackLens Color
Polar Dark GreyLens Features
polarized
Frame Color
BlackColor Code
002/4LColor Description
BlackLens Color
Polar Grey Mirror BlueLens Features
polarized
Color Code
004/3RColor Description
GunmetalLens Color
Polarized Light BlueLens Features
polarized
Color Code
004/3RColor Description
GunmetalLens Color
Polarized Light BlueLens Features
polarized
Size Details
Size DetailsBridge Width
17.00Temple Length
145.00Size
6117-145
Bridge Width
17.00Temple Length
145.00Size
5817-145
Bridge Width
17.00Temple Length
145.00Size
6117-145
Bridge Width
17.00Temple Length
145.00Size
6117-145
Bridge Width
17.00Temple Length
145.00Size
5817-145
Bridge Width
17.00Temple Length
145.00Size
5817-145
Bridge Width
17.00Temple Length
145.00Size
5817-145
Bridge Width
17.00Temple Length
145.00Size
6117-145
Not good. Glass is poorly made with rainbows in the lens. Returning the sunglasses
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Frequently Asked Questions
What is Ray-Ban Chromance lens technology?
Chromance is Ray-Ban's premium polarized lens technology that goes beyond standard polarization. It uses high-contrast pigments, a six-layer anti-reflective coating, and hydrophobic treatment to enhance color vibrancy, sharpen contrast, and improve visual clarity. The lenses are made of lightweight, impact-resistant polycarbonate and are designed specifically for outdoor activities where enhanced detail and color separation matter.
Can I get prescription lenses in the Ray-Ban 3751CH?
Yes, the Ray-Ban RB3751CH is fully prescription-ready. You can add single-vision or progressive prescription lenses while maintaining the Chromance polarized technology. The full-rim metal frame construction provides excellent lens security for prescription installations. Many optical retailers offer prescription Chromance lenses, though availability may vary by provider.
What's the difference between Chromance and regular polarized Ray-Bans?
While both reduce glare, Chromance lenses are engineered to enhance contrast, sharpen visual detail, and make colors appear richer and more separated. Chromance filters light at shorter wavelengths differently, making reds and greens appear particularly vivid. If you mainly want glare reduction, choose standard polarized; if you want glare reduction plus enhanced outdoor clarity and color, choose Chromance.
What size should I choose: 58mm or 61mm?
The 58mm is the standard size suitable for most face widths, while the 61mm is a larger fit for wider faces or those who prefer more coverage. The lens width measurement (58mm or 61mm) indicates the horizontal width of each lens. Both sizes share the same 17mm bridge width and 145mm temple length. If you typically wear medium frames, choose 58mm; for large or extra-large frames, choose 61mm.
Are the Ray-Ban 3751CH sunglasses suitable for driving?
Yes, the polarized Chromance lenses are excellent for driving. The polarization eliminates glare from windshields, wet roads, and other vehicles, while the enhanced contrast helps you see road details more clearly. The hydrophobic coating repels water and fingerprints, keeping your vision clear. However, some drivers prefer gradient lenses for easier dashboard viewing; the 3751CH features solid tints.
Do these sunglasses come with a case and are they authentic Ray-Ban?
Yes, authentic Ray-Ban RB3751CH sunglasses come with an official Ray-Ban case, cleaning cloth, and product documentation. When purchased from authorized retailers like Designer Optics, you receive 100% authentic Ray-Ban products with full manufacturer warranty coverage. The lenses feature the Ray-Ban signature etched on the right lens and RB initials on the left lens as authenticity markers.
Compare With Similar Frames
How the Ray-Ban 3751CH Sunglasses stacks up against the closest alternatives we carry.
- Similar Chromance lens technology with enhanced contrast
- Comparable price range ($175-$281)
- Metal frame construction
- Same Chromance lens technology
- Plastic/acetate frame is lighter weight
- Similar price range ($249-$272)
- Metal frame construction like the 3751CH
- Iconic Clubmaster browline design
- Similar price range ($144-$276)
Read the full comparison
Ray-Ban 3751CH vs. Other Chromance & Metal Sunglasses
If you're considering the Ray-Ban RB3751CH, you might also be comparing it to other Chromance models or metal Ray-Bans in a similar price range. Here's how the 3751CH stacks up against three strong alternatives in our collection.
3751CH vs. Ray-Ban 3671CH Chromance
The Ray-Ban 3671CH is the closest comparison—both are metal-frame Chromance sunglasses with square shapes and similar pricing ($175–$281 for the 3671CH vs. $248–$268 for the 3751CH). The key difference is in the frame design: the 3751CH features a distinctive dual top bar with grooved temple details, while the 3671CH has a different top bar configuration and temple styling. Both deliver the same Chromance lens technology with enhanced contrast and color vibrancy. Choose the 3751CH if you prefer its modern dual-bar aesthetic; choose the 3671CH if you want a slightly different look with the same optical performance.
3751CH vs. Ray-Ban 4264 Chromance
The Ray-Ban 4264 ($249–$272) offers the same Chromance lens technology but in a plastic acetate frame instead of metal. The 4264 has an oversized rectangular shape with more wraparound coverage, making it ideal for high-glare activities like water sports. The plastic construction is lighter, but you lose the adjustable nose pads that the metal 3751CH provides. If you want a sportier, more casual look with maximum coverage, the 4264 is a strong choice. If you prefer the refined look of metal with a customizable fit, stick with the 3751CH.
3751CH vs. Ray-Ban Clubmaster Metal 3716
The Ray-Ban Clubmaster Metal 3716 ($144–$276) is a metal-frame alternative at a comparable price, but with Ray-Ban's iconic browline Clubmaster design instead of a square shape. The 3716 is available with standard polarized lenses but does not feature Chromance technology. If you love the retro-inspired Clubmaster aesthetic and don't need the enhanced contrast of Chromance, the 3716 is a classic choice. But if you prioritize cutting-edge lens technology and a modern square shape, the 3751CH is the better pick.
Why Choose the 3751CH?
The Ray-Ban 3751CH is the right choice if you want a modern square metal frame with Ray-Ban's most advanced lens technology. The Chromance lenses deliver noticeably enhanced color and contrast compared to standard polarized options, making them ideal for outdoor enthusiasts who want to see more detail. The dual top bar design and grooved temples give the 3751CH a distinctive, contemporary look that stands out from classic Ray-Ban shapes. And the adjustable nose pads ensure a secure, comfortable fit that plastic frames can't match.
At a Glance
Ray-Ban Chromance 3671CH Sunglasses
Pros:
- Similar Chromance lens technology with enhanced contrast
- Comparable price range ($175-$281)
- Metal frame construction
- Multiple color options available
Cons:
- Different frame design and temple styling
- May have different size options
- Slightly different aesthetic with different top bar design
Ray-Ban 4264 Sunglasses
Pros:
- Same Chromance lens technology
- Plastic/acetate frame is lighter weight
- Similar price range ($249-$272)
- Oversized rectangular lenses provide more coverage
Cons:
- Plastic frame vs. metal construction
- No adjustable nose pads
- Different aesthetic—more casual than the metal 3751CH
- Larger, more wraparound fit
Ray-Ban Clubmaster Metal 3716 Sunglasses
Pros:
- Metal frame construction like the 3751CH
- Iconic Clubmaster browline design
- Similar price range ($144-$276)
- Available with polarized lenses
Cons:
- Does not feature Chromance technology
- Clubmaster shape is more retro vs. modern square
- Different aesthetic entirely—browline vs. full-rim square
- May not suit all face shapes