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The best way to understand what a hook does is to look at where it occurs in the source code.
do_action( "hook_name" )
apply_filters( "hook_name", "what_to_filter" )
.Remember, this hook may occur in more than one file. Moreover, the hook's context may change from version to version.
Line | Code |
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267 | /** |
268 | * Filters Twenty Nineteen custom colors CSS. |
269 | * |
270 | * @since Twenty Nineteen 1.0 |
271 | * |
272 | * @param string $css Base theme colors CSS. |
273 | * @param int $primary_color The user's selected color hue. |
274 | * @param string $saturation Filtered theme color saturation level. |
275 | */ |
276 | return apply_filters( 'twentynineteen_custom_colors_css', $theme_css, $primary_color, $saturation ); |
277 | } |
278 |
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