There is rarely one right answer. Here are several categories of pairing options, each with a reason it may work.
Cobalt Green
Similar lightness for a subtle, tone-on-tone pairing with minimal contrast.
Sea Green
Similar lightness for a subtle, tone-on-tone pairing with minimal contrast.
Forest Green
Similar lightness for a subtle, tone-on-tone pairing with minimal contrast.
Green
Similar lightness for a subtle, tone-on-tone pairing with minimal contrast.
Emerald Green
Enough lightness contrast to read as two distinct colours without feeling harsh.
Lime Green
Enough lightness contrast to read as two distinct colours without feeling harsh.
Pistachio
Enough lightness contrast to read as two distinct colours without feeling harsh.
Moss Green
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.
Ruby
A saturated accent from a different hue family for a deliberate pop of contrast.
Tyrian Purple
A saturated accent from a different hue family for a deliberate pop of contrast.
Cerise
A saturated accent from a different hue family for a deliberate pop of contrast.
Crimson
A saturated accent from a different hue family for a deliberate pop of contrast.