The effects that gloss levels (sheen) has on light absorbtion and relfection is marginal - at best. I personally think it's a myth that sheen reflects any amount of *useable* light back into a room. Frankly, I see it as just plain glare. The average home with the average lighting plan most likely isn't going to have a lighting plan that would allow the sheen and reflectance from a paint film to contribute postively to the overall design and function of a room. The reflectance from sheen is just as measurable as the reflectance from color. Problem is gloss measurements are not consistent throughout the industry. LRV, Light Reflectance Values measure the absorbtion and reflectance of light and is pretty cut-n-dry, accurate and consistent. It's one of the few pieces of data about color that you can count on. If you want to really darken your bedroom, you can choose any hue you want, just look for the paint color to have a LRV below 20. You likely will have to prime and make adjustments to your lighting plan for non-sleep times. In general, I don't do red bedrooms. Nor do I do blue dining rooms or brown bathrooms. Few people have the color tolerance that fits with those color choices in those rooms/functions. Red bedrooms, blue dining rooms and brown bathrooms carry color associations that are opposite the basic functions of those rooms and for the majority doesn't work out so well. The colors sure look pretty, but the room *feels* weird. Mistake made - people only focus on stuff and how it will match and look and they don't consider their personal color tolerances and how it's going to work and feel. For some people those color choices in those rooms can work. It depends. You guys might be red bedroom people - I don't know. Just be sure you take a minute to think about it to make sure it's a good color choice for you. The red might meet his/your expectation for darkening the bedroom for sleep, but the physio/psychological response to a red bedroom may have an agitating, unrestful, uncomfortable affect on one or the both of you. Painting red is not the most fun in the world. You do have to prime, you are in for at least two coats, etc. Not knowing that red walls conflict with your individual tolerance for color and having to paint over them "to get your room back" really sucks. Here is a link that might be useful: How To Use LRV

On my monitor your house looks like a charcoal, or very dark gray. I would use the paint you used on the house, and make a paint wash and do the brick with the paint wash, so it blends into the house rather than a big focal point, that doesnt go well.

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The good news is it’s not an arbitrary choice. The color options - the most practical options - are in the brick. In other words, pull a color from the brick for the siding. Pairing a color of green with orange/peach red/pink brick is challenging. You have to get a green from the right hue family first and it needs to have the same (or similar) chroma as the average predominant chroma of the brick. This could take a hot minute and several samples if you’re just eyeballing it and not using hue/value/chroma color notations. In every single example where a green is on point with brick, we can explain the harmony precisely by analyzing hue families and chroma (colorfulness). Likewise, we can explain why a Color scheme looks off or clumsy.