DMC 524 to Sullivans: Thread Conversion

Sullivans 45120 is a close match for DMC 524 Very Light Fern Green. At pale values, small differences in dye concentration can read as meaningful color shifts, so the comparison should happen on your actual project fabric rather than a white card or thread comparison sheet. For the aerial perspective role — far hills and distant treelines that dissolve into sky — the substitute needs only to read as lighter and more muted than 523; any thread in the right pale grey-green zone will function in that context.