diff --git a/lua/lualine/components/diagnostics/config.lua b/lua/lualine/components/diagnostics/config.lua
index f554ed7..6b80fff 100644
--- a/lua/lualine/components/diagnostics/config.lua
+++ b/lua/lualine/components/diagnostics/config.lua
@@ -20,7 +20,10 @@ M.options = {
   always_visible = false,
   sources = { vim.fn.has('nvim-0.6') == 1 and 'nvim_diagnostic' or 'nvim_lsp', 'coc' },
   sections = { 'error', 'warn', 'info', 'hint' },
-  diagnostics_color = {
+}
+
+function M.apply_default_colors(opts)
+  local default_diagnostics_color = {
     error = {
       fg = utils.extract_color_from_hllist(
         'fg',
@@ -49,7 +52,8 @@ M.options = {
         '#273faf'
       ),
     },
-  },
-}
+  }
+  opts.diagnostics_color = vim.tbl_deep_extend('keep', opts.diagnostics_color or {}, default_diagnostics_color)
+end
 
 return M
diff --git a/lua/lualine/components/diagnostics/init.lua b/lua/lualine/components/diagnostics/init.lua
index a7e3669..8092ad7 100644
--- a/lua/lualine/components/diagnostics/init.lua
+++ b/lua/lualine/components/diagnostics/init.lua
@@ -19,6 +19,7 @@ function M:init(options)
   -- Run super()
   M.super.init(self, options)
   -- Apply default options
+  modules.default_config.apply_default_colors(self.options)
   self.options = vim.tbl_deep_extend('keep', self.options or {}, modules.default_config.options)
   -- Apply default symbols
   self.symbols = vim.tbl_extend(
diff --git a/lua/lualine/components/diff/init.lua b/lua/lualine/components/diff/init.lua
index a797c8a..5a4fba6 100644
--- a/lua/lualine/components/diff/init.lua
+++ b/lua/lualine/components/diff/init.lua
@@ -12,7 +12,10 @@ local M = lualine_require.require('lualine.component'):extend()
 local default_options = {
   colored = true,
   symbols = { added = '+', modified = '~', removed = '-' },
-  diff_color = {
+}
+
+local function apply_default_colors(opts)
+  local default_diff_color = {
     added = {
       fg = modules.utils.extract_color_from_hllist(
         'fg',
@@ -34,12 +37,14 @@ local default_options = {
         '#ff0038'
       ),
     },
-  },
-}
+  }
+  opts.diff_color = vim.tbl_deep_extend('keep', opts.diff_color or {}, default_diff_color)
+end
 
 -- Initializer
 function M:init(options)
   M.super.init(self, options)
+  apply_default_colors(self.options)
   self.options = vim.tbl_deep_extend('keep', self.options or {}, default_options)
   -- create highlights and save highlight_name in highlights table
   if self.options.colored then