| Code: | RAL 660-4 |
| Name: | |
| Brand: | RAL Effect |
Let's dive into a full RAL 660-4 paint color review. Take a look at pictures of real interiors and exteriors painted with beautiful RAL 660-4. Find out if this gorgeous cold blue paint color would look great on your living room walls or trims, kitchen cabinet, bedroom accent wall, bathroom or house exterior.
View the photos of real spaces painted with this blue that were not included in specific categories.Close-ups, painted furniture, storages and dressers, hallways, stairs and ceilings.
RAL 660-4 has a clear blue undertone based on its position in the color space. We identify undertones by isolating the pure hue (separating it from lightness and saturation), which avoids distortions caused by tints, tones, and shades.
This method is generally more reliable than judging undertones on a white background.
HEX value:
#3FB8CF
RGB code:
63, 184, 207
At 190° on the HSL hue wheel, this Blue falls clearly in the cool range.
RAL 660-4 HSL code: 190, 60%, 53%
Hue - degree on a color wheel from 0 to 360. 0 is red, 120 is green, and 240 is blue.
Saturation is expressed as a percentage. At 0%, it appears as a shade of grey, and at 100%, it is in full color.
Lightness is also a percentage value. 0% is black, and 100% is white.
Natural Lighting. During the day, natural light shifts from about 2000 K at sunrise/sunset to 5500–6500 K at noon.
In addition, natural‑light temperature depends on its direction:
| Direction of sunlight | Visible temp. | Hue | Duration |
|---|---|---|---|
| North | Cool | Bluish | All day |
| East | Warm | Yellow | Before noon |
| West | Warm | Orange‑red | After noon |
| South | Warm | Orange‑yellow | All day |
Artificial Lighting. When choosing bulbs, pay attention to their color‑temperature (Kelvins).
Use the slider to see how this Blue shade looks under different lighting:
4000K
RAL 660-4 has an LRV of 30.88% and refers to Medium colors that reflect a lot of light. Why LRV is important?
Light Reflectance Value measures the amount of visible and usable light that reflects from a painted surface.
Simply put, the higher the LRV of a paint color, the brighter the room you will get.
The scale goes from 0% (absolute black, absorbing all light) to 100% (pure white, reflecting all light).
Act like a pro: When choosing paint with an LRV of 30.88%, pay attention to your bulbs' brightness. Light brightness is measured in lumens. The lower the paint's LRV, the higher lumen level you need. Every square foot of room needs at least 40 lumens. That means for a 200 ft2 living room you’ll need about 8000 lumens of light – e.g., eight 1000 lm bulbs.
We have collected almost every possible color code you could ever need. To copy the code, just click the icon to the right of it.
| Format | Code | |
|---|---|---|
| HEX | #3FB8CF |  |
| RGB Decimal | 63, 184, 207 | |
| RGB Percent | 24.71%, 72.16%, 81.18% | |
| HSV | Hue: 190° Saturation: 69.57% Value: 81.18% | |
| HSL | hsl(190, 60, 53) | |
| CMYK | Cyan: 69.57 Magenta: 11.11 Yellow: 0.0 Key: 18.82 | |
| YIQ | Y: 150.443 I: -79.495 Q: -18.438 | |
| XYZ | X: 30.447 Y: 39.839 Z: 65.1 | |
| CIE Lab | L:69.355 a:-25.793 b:-21.325 | |
| CIE Luv | L:69.355 u:-45.006 v:-29.616 | |
| Decimal | 4176079 | |
| Hunter Lab | 63.118, -24.351, -16.968 | |
