Highlight

New box of highlighters

{{#if:|{{#ifexpr:({{#time:U|{{{3}}}}} - {{#time:U|now}}) > 0|pink|pink}}|pink}}
{{#if:|{{#ifexpr:({{#time:U|{{{3}}}}} - {{#time:U|now}}) > 0|red|red}}|red}}
{{#if:|{{#ifexpr:({{#time:U|{{{3}}}}} - {{#time:U|now}}) > 0|orange|orange}}|orange}}
{{#if:|{{#ifexpr:({{#time:U|{{{3}}}}} - {{#time:U|now}}) > 0|lightyellow|lightyellow}}|lightyellow}}
{{#if:|{{#ifexpr:({{#time:U|{{{3}}}}} - {{#time:U|now}}) > 0|yellow|yellow}}|yellow}}
{{#if:|{{#ifexpr:({{#time:U|{{{3}}}}} - {{#time:U|now}}) > 0|lightgreen|lightgreen}}|lightgreen}}
{{#if:|{{#ifexpr:({{#time:U|{{{3}}}}} - {{#time:U|now}}) > 0|green|green}}|green}}
{{#if:|{{#ifexpr:({{#time:U|{{{3}}}}} - {{#time:U|now}}) > 0|lightblue|lightblue}}|lightblue}}
{{#if:|{{#ifexpr:({{#time:U|{{{3}}}}} - {{#time:U|now}}) > 0|blue|blue}}|blue}}
{{#if:|{{#ifexpr:({{#time:U|{{{3}}}}} - {{#time:U|now}}) > 0|violet|violet}}|violet}}
{{#if:|{{#ifexpr:({{#time:U|{{{3}}}}} - {{#time:U|now}}) > 0|brown|brown}}|brown}}
{{#if:|{{#ifexpr:({{#time:U|{{{3}}}}} - {{#time:U|now}}) > 0|gray|gray}}|gray}}
{{#if:|{{#ifexpr:({{#time:U|{{{3}}}}} - {{#time:U|now}}) > 0|silver|silver}}|silver}}
{{#if:|{{#ifexpr:({{#time:U|{{{3}}}}} - {{#time:U|now}}) > 0|gold|gold}}|gold}}

Syntax: { { Highlight | text to display | optional color } }
The default color is {{#if:|{{#ifexpr:({{#time:U|{{{3}}}}} - {{#time:U|now}}) > 0|yellow|yellow}}|yellow}} 

For more options with font colors, use font color template 
{{ safesubst:#if: red with lightgreen highlight - using Font Color template
| {{ safesubst:#if: 
     | {{ safesubst:#ifeq:  | yes
     | [[ {{ safesubst:#if:1| red with lightgreen highlight - using Font Color template }}|{{ safesubst:#if:1| red with lightgreen highlight - using Font Color template }}]]
     | [[|{{ safesubst:#if:1| red with lightgreen highlight - using Font Color template }}]]
     }}
   | {{ safesubst:#if:1| red with lightgreen highlight - using Font Color template }}
   }}
| {{ safesubst:#if: 
     | {{ safesubst:#ifeq:  | yes
     | [[ {{ safesubst:#if:1| lightgreen }} |{{ safesubst:#if:1| lightgreen }}]]
     | [[ {{ safesubst:#if:1|  }} |{{ safesubst:#if:1| lightgreen }}]]
   }}
 | {{ safesubst:#if:1| lightgreen }}
 }}

}}

Syntax: { { font color|foreground|optional background|text } }

https://meta.wikimedia.org/wiki/Help:Text_color
https://meta.wikimedia.org/wiki/Wiki_color_formatting_help