Unusually brown overall, above and below. All the blues illustrated in (1) are paler beneath with more detailed, more prominent markings. And from above, most have distinct white fringes. I'm attributing the missing fringe to wear and tear (in May?), but would that diminish the interior pattern as well?

I have shots of two more individuals from the same time and place, a male (blue) and a female (brown with a blue central wash), top side only, with less worn fringes but no distinguishing spots or streaks. Influenced by those, my best, poor, guess for all three is Boisduval's blue, if it ever gets this plain below.

On heartleaf buckwheat, Eriogonum compositum compositum.