In the Science of Logic, Hegel initially presents quality as existent determinateness. He further distinguishes two modes of determining quality in accordance with the moments of existence:
Determinateness thus isolated by itself, as existent determinateness, is quality - something totally simple, immediate ... Quality, in the distinct value of existent, is reality; when affected by a negating, it is negation in general, still a quality but one that counts as a lack and is further determined as limit, restriction (Science of Logic, 21.98-99).
I am having trouble understanding what Hegel means by quality. In particular, I am having trouble with the locution "existent determinateness." Hegel has defined existence as the unity of being and non-being in the form of an immediate, and determinateness as the result of bringing being and non-being into concrete unity in the form of an immediate. Using Hegel's distinction between positing and reflecting, I can understand the distinction between existence and determinateness. But I am having trouble with existent determinateness (quality), and how it is the determinateness of existence.