Shadow Color on Antarctic Ice in Midsummer: The Answer

Your shadow would not be visible on the icy ground.

Why?

At the South Pole (and near it) during austral summer (Sept 21 – Mar 21), the Sun circles the horizon at a nearly constant elevation of ~23.5° (the Earth's axial tilt). It never rises high overhead.

• Sun altitude: ~23.5° above horizon.
• Shadow direction: Cast horizontally along the ice surface.
• Shadow length: Extremely long (cotangent of 23.5° ≈ 2.3 × your height).
• Visibility: On flat, featureless, blindingly white ice, a faint, elongated gray smudge is indistinguishable from surface variations, glare, and sastrugi (wind-sculpted ridges).

Additional Factors

• High Albedo: Ice reflects >80% of light; shadows are low-contrast.
• Diffuse Light: Scattering in atmosphere fills in shadows.
• Eye Adaptation: Pupils constricted against glare reduce shadow perception.

You'd see your shadow clearly only on vertical surfaces (tent, vehicle) or if you create a dark backdrop.