These settings affect the Article Link Panel which is the Panel that appears when a user tries to link to an article that is not yet downloaded or purchased.

"format": {
  "colors": {
    "articleLinkPanelBackground": [125, 125, 125, 1.0],
    "articleLinkPanelTitle": [125, 125, 125, 1.0],
    "articleLinkPanelMessage": [125, 125, 125, 1.0],
    "articleLinkPanelButtonDownloadBackground": [125, 125, 125, 1.0],
    "articleLinkPanelButtonDownloadSelected": [125, 125, 125, 1.0],
    "articleLinkPanelButtonDownloadBorder": [125, 125, 125, 1.0],
    "articleLinkPanelButtonDownloadText": [125, 125, 125, 1.0],
    "articleLinkPanelButtonDownloadProgressBar": [125, 125, 125, 1.0],
    "articleLinkPanelButtonDownloadProgressBackground": [125, 125, 125, 1.0],
    "articleLinkPanelButtonPurchaseBackground": [125, 125, 125, 1.0],
    "articleLinkPanelButtonPurchaseSelected": [125, 125, 125, 1.0],
    "articleLinkPanelButtonPurchaseBorder": [125, 125, 125, 1.0],
    "articleLinkPanelButtonPurchaseText": [125, 125, 125, 1.0],
    "articleLinkPanelButtonCloseBackground": [125, 125, 125, 1.0],
    "articleLinkPanelButtonCloseSelected": [125, 125, 125, 1.0],
    "articleLinkPanelButtonCloseBorder": [125, 125, 125, 1.0],
    "articleLinkPanelButtonCloseText": [125, 125, 125, 1.0]
    },
  "dimensions": {
    "articleLinkPanelButtonDownloadBorderSize": 1,
    "articleLinkPanelButtonDownloadBorderRadius": 1,
    "articleLinkPanelButtonDownloadHeight": 44,
    "articleLinkPanelButtonPurchaseBorderSize": 1,
    "articleLinkPanelButtonPurchaseBorderRadius": 1,
    "articleLinkPanelButtonPurchaseHeight": 44,
    "articleLinkPanelButtonCloseBorderSize": 1,
    "articleLinkPanelButtonCloseBorderRadius": 1,
    "articleLinkPanelButtonCloseHeight": 44
    },
  "padding": {
    "articleLinkPanelTitlePadding": [5, 5, 5, 5],
    "articleLinkPanelMessagePadding": [5, 5, 5, 5],
    "articleLinkPanelButtonDownloadPadding": [5, 5, 5, 5],
    "articleLinkPanelButtonPurchasePadding": [5, 5, 5, 5],
    "articleLinkPanelButtonClosePadding": [5, 5, 5, 5]
    },
  "positions": {
    "articleLinkPanelTitleAlignment": 1,
    "articleLinkPanelMessageAlignment": 1
    }
  }