What are Valspar Mountain River undertones?
Mountain River 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:
#3F576A
RGB code:
63, 87, 106
Is Valspar Mountain River 4005-6C cool or warm?
warm
cool
With a hue of 207°, this dark blue reads cool based on its HSL hue position.
4005-6C Mountain River HSL code: 207, 25%, 33%
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.
How light temperature affects Mountain River
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 dark blue shade looks under different lighting:
4000K
Coordinating colors.
Colors that go with Valspar Mountain River:
Monochromatic color scheme
This scheme consists of various shades, tints, and tones of a single color. While it offers a perfect combination of hues, without accent décor it may become monotonous.
Lighter shades
4005-6C
Mountain River
Darker shades
4005-6C
Mountain River
Complementary color scheme
This color scheme is a combination of two shades that are opposite each other on the color wheel. The high contrast between these colors creates a vibrant and dynamic visual effect. For the color Mountain River with a green hue, complementary colors are those with a red hue close to 27, such as Valspar Cocoa Berry and Soft Rabbit Brown.
LRV of Mountain River
Mountain River has an LRV of 8.96% and refers to Dark colors which means that this color almost does not reflect 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 8.96%, 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.
Color codes
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 | #3f576a |  |
| RGB Decimal | 63, 87, 106 | |
| RGB Percent | 24.71%, 34.12%, 41.57% | |
| HSV | Hue: 207° Saturation: 40.57% Value: 41.57% | |
| HSL | hsl(207, 25, 33) | |
| CMYK | Cyan: 40.57 Magenta: 17.92 Yellow: 0.0 Key: 58.43 | |
| YIQ | Y: 81.99 I: -20.407 Q: 0.836 | |
| XYZ | X: 8.059 Y: 8.913 Z: 14.928 | |
| CIE Lab | L:35.817 a:-3.692 b:-13.788 | |
| CIE Luv | L:35.817 u:-11.659 v:-17.832 | |
| Decimal | 4151146 | |
| Hunter Lab | 29.855, -4.065, -8.746 | |
Valspar 4005-6C Mountain River
Copy color code
Color equivalents
S500-7
Infinite Deep Sea
Behr
S 6020-B
NCS
30BB 10/112
Breton Blue
Dulux
27BB 10/138
Night Seas
Dulux
208
Hicks' Blue
Little Greene
M436
Royal
Tikkurila
HC-156
Van Deusen Blue
Benjamin Moore
4005-4C
Motor City Blue
Valspar
M500-6
Express Blue
Behr
1680
Hudson Bay
Benjamin Moore
MQ5-58
Velvet Rope
Behr
1666
In the Midnight Hour
Benjamin Moore
4004-4C
Midnight Shadow
Valspar
HC-155
Newburyport Blue
Benjamin Moore
10BB 09/155
Indigo Shade
Dulux
SW 7602
Indigo Batik
Sherwin Williams
777
Summer Nights
Benjamin Moore
4007-6C
Deep Twilight Blue
Valspar