There is rarely one right answer. Here are several categories of pairing options, each with a reason it may work.
Fuchsia
Similar lightness for a subtle, tone-on-tone pairing with minimal contrast.
Amethyst
Similar lightness for a subtle, tone-on-tone pairing with minimal contrast.
Mulberry
Similar lightness for a subtle, tone-on-tone pairing with minimal contrast.
Dark Orchid
Similar lightness for a subtle, tone-on-tone pairing with minimal contrast.
Orchid
Enough lightness contrast to read as two distinct colours without feeling harsh.
Violet
Enough lightness contrast to read as two distinct colours without feeling harsh.
Hot Pink
Enough lightness contrast to read as two distinct colours without feeling harsh.
Medium Purple
Enough lightness contrast to read as two distinct colours without feeling harsh.
White
Strong lightness contrast and saturation for a bold, graphic pairing.
Black
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.
Lime
A saturated accent from a different hue family for a deliberate pop of contrast.
Chartreuse
A saturated accent from a different hue family for a deliberate pop of contrast.
Lime Green
A saturated accent from a different hue family for a deliberate pop of contrast.
Green
A saturated accent from a different hue family for a deliberate pop of contrast.