The first one is very dark, but a great example of how the eye sees in relative values and tries to auto-correct.
The brightest tone in the image is on the left below (RGB 85;89;98) and even though it's placed next to the near white of the web page your brain still tries to interpret it as a full range of tones with the brightest part being white.
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The brightest tone in the first image is on the left and even though you know it when you look at the original image you still see it as a lighter shade.
Viewed on a screen in a darkened room without a fixed reference it is very easy to edit an image by it's relative values only and what you think is a well balanced image can actually be your eye auto-correcting. Now everybody's eye auto-corrects with reference to their own visual memory, so not only are no two alike but most screens are next to objects of normal contrast and brightness so an image is seen in values relative to them. (Prints are always seen in the same light that reflects off the objects around them and are always seen in values relative to the environment, screens generate their own light and it is very easy to separate them from any fixed reference).
Though there will always be a slight variation in the way everybody interprets an image, what appears to you, in isolation, as a well balanced image with subtle colour and contrast will appear to most as a very dark image with little colour or contrast. People don't always see your images the way you think they do.
As an analogy, you are sitting in a shaded room and your eyes are adjusted to your image. I have just been flicking through some bright colourful images, I have been in the bright sunshine and when I walk into your room it looks very dark to me.
I would edit the image by keeping the shadows
relatively dark and soft in contrast. I would then have the highlights small in relative area but high in contrast. Because we see in relative values the way to make something
look dark is by contrasting it with something that looks bright. You can raise the values of the shadows (and have a lot higher colour content because there's less black), and still make the image appear dark simply by having a small amount of near white. It is the contrast between the two that creates the effect. See how I've made the brightest tone in your image look dark by contrasting it with white, and you make it look lighter because it's contrasted with darker tones?