There is rarely one right answer. Here are several categories of pairing options, each with a reason it may work.
Ochre
Similar lightness for a subtle, tone-on-tone pairing with minimal contrast.
Peru
Similar lightness for a subtle, tone-on-tone pairing with minimal contrast.
Burnt Orange
Similar lightness for a subtle, tone-on-tone pairing with minimal contrast.
Clay
Similar lightness for a subtle, tone-on-tone pairing with minimal contrast.
Burnt Sienna
Enough lightness contrast to read as two distinct colours without feeling harsh.
Sandy Brown
Enough lightness contrast to read as two distinct colours without feeling harsh.
Coral
Enough lightness contrast to read as two distinct colours without feeling harsh.
Terracotta
Enough lightness contrast to read as two distinct colours without feeling harsh.
White
Strong lightness contrast and saturation for a bold, graphic pairing.
Mint Cream
Strong lightness contrast and saturation for a bold, graphic pairing.
Off-White
Strong lightness contrast and saturation for a bold, graphic pairing.
Ivory
Strong lightness contrast and saturation for a bold, graphic pairing.
Grey
A low-chroma neutral lets the original colour stay the visual focus.
Taupe Grey
A low-chroma neutral lets the original colour stay the visual focus.
Silver
A low-chroma neutral lets the original colour stay the visual focus.
Ash Grey
A low-chroma neutral lets the original colour stay the visual focus.
Navy Blue
A saturated accent from a different hue family for a deliberate pop of contrast.
Blue
A saturated accent from a different hue family for a deliberate pop of contrast.
Ultramarine
A saturated accent from a different hue family for a deliberate pop of contrast.
Midnight Blue
A saturated accent from a different hue family for a deliberate pop of contrast.