International Orange (en.wikipedia.org)

Which is at the end of this article for some additional colour info https://en.wikipedia.org/wiki/Lime_(color)#Lime_green

I've seen plenty of yellow sausages that didn't mean emergency, I think that's location specific (I'm not sure where it applies). Most people I know pick the color based on personal preference / color matching the rest of the gear.

I’ve started seeing more black DSMBs recently. They’re meant to be very visible, but every skipper I’ve spoken to disagrees.

When I’m doing project diving, we’ll use a pink DSMB to mark something that we want to go back to, and not surface with it.

Orange for surfacing and yellow for an emergency, as you describe.

When you have high levels of confidence that the background will be ocean water and the weather is likely to be decent (or at least, decent enough to be diving), then it may be the case that yellow is more visible.

International Orange is designed to be maximally visible under as many different conditions as possible, so may not be the most visible in every single circumstance.

So did I, so I wrapped my car orange:

https://photos.app.goo.gl/ru4EBj1SibVu1sqj6

As another poster said, just wrap it in whatever color you want. Costs start around 2500$, but that is far cheaper than a paint job and you can get any color you want, without worry about resale value. Personally, i like a matte finish.. something unheard of on production cars. Wrap is an easy way to the effect without repainting.

White is highly visible (except maybe in a snow storm!) and a fairly popular vehicle color.

There was a study in Australia about this: https://www.monash.edu/__data/assets/pdf_file/0007/216475/An...

How do you define the line between orange and red?

When it comes to colorblindness, it doesn’t make much sense to ask if a single color is recognizable. Color blindness is a difficulty in distinguishing between different colors - some pairs of colors that are visibly contrasting to normal sight may not be visibly contrasting to colorblind sight, such as red/brown, brown/green, and red/green.

There are three main mechanisms of colorblindness, corresponding to the three main types of light receptors in the eye: deutan (green-weak), protan (red-weak), and tritan (“blue-weak”, although this is not a common term). About three quarters of color vision issues are deutan, one quarter is protan, less than 1% is tritan.

When you go out into the world and start interacting with contrasting color pairs, both green-weak and red-weak color vision cashes out as “red-green colorblindness”, while blue-weak cashes out as “blue-green colorblindness”. None of these have issues distinguishing yellow/orange from blue.

Presumably this is actually the motivation for the international air safety color being orange, as it’s easily distinguishable from blue sky.

Depends a bit on which game.

Eg the Tomb Raider reboot uses white for climbables.

Thank you. I didn't know I needed this in my life, but I did.

Well, it's dark orange plus context.

Desaturated dark orange more specifically

The orange space suits aren't worn in space, nor were they worn on the moon. Armstrong and Aldrin wore white, despite the moon being a bright gray. These are for recovery operations on Earth.

White is fine on the moon; every person who walked on the Moon wore a white suit. The Moon looks light colored to us on Earth, but its albedo is about 0.14, which is roughly the same as worn asphalt or dirt.

The white of lunar and EVA suits is white because of temperature regulation reasons, and is very unlikely to change.