Warbringer
Explorer
42!!!!!
What's the question?
42!!!!!
Githyanki Knight
Githyanki Warrior
42!!!!!
Black and white doesn't prevent reading, and doesn't prevent discerning details. There are a lot of details (eg visual textures, saturation) that can be discerned independently of colour.
Dim light/partial obscurement strikes me as the bigger issue, although I think someone with good eyesight might be able to read large text held close, even in dim light.
What's the question?
Being able to read isn't affected by the lack of color. It's simply due to not having enough light to make out the letters regardless of contrast.
I really encourage you to try the experiment I mentioned where you try to read 10 feet away from a candle, tablet/smartphone on flashlight mode, or similar light source in an otherwise dark room. You can read very easily when you're adjacent to the light, but moving just 10 feet away makes it impossible, and 10 feet away is where there's dim light. You can probably make out the letters on the cover of the PHB, but you really won't be able to read the contents at all.
[MENTION=93444]shidaku[/MENTION]
I'd want more creatures to have heightened senses though. Gnoll, Owlbears, etc. should have a better sense of smell for example that they could use to hunt in the dark. This is something you could even give to creatures that aren't necessarily bestial, such as Vampires.
Where as I'd allow; Drow, Duerger, Deep Gnomes, Mind Flayer, Beholder, Drider, Gargoyle, Quaggoths, Umber Hulks, Formorian, Hags, Merrow and Merfolk to all have Darkvision... these all make sense to me. Anything else, not so much. I especially hate the idea of Kobolds, Goblins, and Orcs having darkvision as I consider them "starter enemies", and I like to encourage my players to use tactics to take down the enemies. If they get used to the enemies all having"I can always see everything" vision, they'll never try cleaver tactics in the future.