I enjoyed reading the previous comments on this subject which interests me.
Unfortunately, while I like to read anecdotes, and I don't doubt that everyone has experienced what they wrote, I know that anecdotes can be a matter of memory and seldom involve side-by-side controlled measurements.
In boats there are many variables: Conditions can change (more or less wind
or humidity or water
temp or air temp or angles to sun etc.) and one boat may have insulation
and another not.
For that reason, I suggest everyone watch the following short video that shows some comparative testing of colors and how they differ in their ability to absorb light energy (sunlight).
Please note that the colors you see in the video are thermal imaging representations, and one should look at the captions to see which color is represented, and look at the linked color page to see the actual colors tested.
Which colors absorb more sunlight?
Use your word processor to print a page with different color bars and put it under the sun. The temperature difference between different colors reflects the difference in their abilities to absorb light energy. See the color bars used in this video:
Color page: http://3.bp.blogspot.com/-cZnZhrPxp2...4XbCCqBrgo/s20
In the first video linked above, notice the reflective ability (or the ability to absorb sunlight) of the different colors (see the linked color page to see the real colors on the printed page). These are colors, and unfortunately there is no strip for "white."
Notice the second color strip from the left side.
This corresponds to the color "Yellow." The one that is "coolest" of the colors tested is the color Yellow. In the video's thermal imaging, it appears blue-green, while the "hottest" colors (those that absorb the most sunlight) appear bright yellow-red.
Of the colors tested in this test, the "coolest" colors that reflect the most sunlight were:
Yellow (the coolest)
Red (second coolest, tied with Light Gray)
Light Gray (second coolest, tied with Light Gray)
The colors that absorb the most sunlight (and show in the thermal image as the "hottest" colors) are:
BLACK (The Hottest)
GRAY (Almost the Hottest)
I like the look of dark blue boats. It is very likely the boat I get would be white, as that is the most common color for hulls.
But, IF I had a choice for a boat paint
job I would choose bright yellow.
For these reasons:
1. Yellow is my personal favorite because I like the color, and I find it cheerful.
2. It reflects sunlight very well and I would like that in the tropics.
3. It is highly visible, especially in a marine environment
, and I would like that anywhere.
My second choice would be a red (i.e. International Orange).
1. Red is another one of my "favorite colors. I like the color.
2. It reflects sunlight well, almost as well as Yellow does.
3. It is highly visible, and in fact is often chosen for arctic boats.
This is not Rocket Science.
But, if you want to hear it from a Rocket Scientist, here you go:
Why space rockets are white - do you know?