From mboxrd@z Thu Jan  1 00:00:00 1970
From: Marco <domanov@gmail.com>
Subject: Re: need to increase contrast in all emacs faces for legibility
Date: Wed, 11 Dec 2019 09:56:43 +0100
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To: Samuel Wales <samologist@gmail.com>
Cc: emacs-orgmode@gnu.org

Hello,

> is it possible to programmatically increase foreground contrast
> against their background in all faces?

While I can't answer your question, which is an interesting one (don't
think it's org related, though), I just wanted to ask: can't you just
adjust the temperature of your display with a tool such as redshift
(for linux) or f.lux (windows)?