There is rarely one right answer. Here are several categories of pairing options, each with a reason it may work.
Amber
Similar lightness for a subtle, tone-on-tone pairing with minimal contrast.
Gold
Similar lightness for a subtle, tone-on-tone pairing with minimal contrast.
Mustard
Similar lightness for a subtle, tone-on-tone pairing with minimal contrast.
Citrine
Similar lightness for a subtle, tone-on-tone pairing with minimal contrast.
Topaz
Enough lightness contrast to read as two distinct colours without feeling harsh.
Flax
Enough lightness contrast to read as two distinct colours without feeling harsh.
Naples Yellow
Enough lightness contrast to read as two distinct colours without feeling harsh.
Khaki
Enough lightness contrast to read as two distinct colours without feeling harsh.
Black
Strong lightness contrast and saturation for a bold, graphic pairing.
White
Strong lightness contrast and saturation for a bold, graphic pairing.
Prussian Blue
Strong lightness contrast and saturation for a bold, graphic pairing.
Mint Cream
Strong lightness contrast and saturation for a bold, graphic pairing.
Navy Blue
A saturated accent from a different hue family for a deliberate pop of contrast.
Indigo
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.
Blue
A saturated accent from a different hue family for a deliberate pop of contrast.
Black
Meets WCAG AA contrast (12.8:1) for normal text if used as text/background.
Navy Blue
Meets WCAG AA contrast (9.7:1) for normal text if used as text/background.
Midnight Blue
Meets WCAG AA contrast (9.0:1) for normal text if used as text/background.
Prussian Blue
Meets WCAG AA contrast (8.2:1) for normal text if used as text/background.