There is rarely one right answer. Here are several categories of pairing options, each with a reason it may work.
Goldenrod
Similar lightness for a subtle, tone-on-tone pairing with minimal contrast.
Peridot
Similar lightness for a subtle, tone-on-tone pairing with minimal contrast.
Moss Green
Similar lightness for a subtle, tone-on-tone pairing with minimal contrast.
Caramel
Similar lightness for a subtle, tone-on-tone pairing with minimal contrast.
Ecru
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.
Olive Green
Enough lightness contrast to read as two distinct colours without feeling harsh.
Tan
Enough lightness contrast to read as two distinct colours without feeling harsh.
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.
Indigo
A saturated accent from a different hue family for a deliberate pop of contrast.
Black
Meets WCAG AA contrast (8.5:1) for normal text if used as text/background.
Navy Blue
Meets WCAG AA contrast (6.5:1) for normal text if used as text/background.
Midnight Blue
Meets WCAG AA contrast (6.0:1) for normal text if used as text/background.
Prussian Blue
Meets WCAG AA contrast (5.4:1) for normal text if used as text/background.