HTML

bootstrap text color

<p class="text-primary">.text-primary</p>
<p class="text-secondary">.text-secondary</p>
<p class="text-success">.text-success</p>
<p class="text-danger">.text-danger</p>
<p class="text-warning">.text-warning</p>
<p class="text-info">.text-info</p>
<p class="text-light bg-dark">.text-light</p>
<p class="text-dark">.text-dark</p>
<p class="text-muted">.text-muted</p>
<p class="text-white bg-dark">.text-white</p>

bootstrap background color

<div class="p-3 mb-2 bg-primary text-white">.bg-primary</div>
<div class="p-3 mb-2 bg-secondary text-white">.bg-secondary</div>
<div class="p-3 mb-2 bg-success text-white">.bg-success</div>
<div class="p-3 mb-2 bg-danger text-white">.bg-danger</div>
<div class="p-3 mb-2 bg-warning text-dark">.bg-warning</div>
<div class="p-3 mb-2 bg-info text-dark">.bg-info</div>
<div class="p-3 mb-2 bg-light text-dark">.bg-light</div>
<div class="p-3 mb-2 bg-dark text-white">.bg-dark</div>
<div class="p-3 mb-2 bg-body text-dark">.bg-body</div>
<div class="p-3 mb-2 bg-white text-dark">.bg-white</div>
<div class="p-3 mb-2 bg-transparent text-dark">.bg-transparent</div>

bootstrap 5 background color

<div class="bg-primary">bg-primary</div>
<div class="bg-secondary">bg-secondary</div>
<div class="bg-success">bg-success</div>
<div class="bg-danger">bg-danger</div>
<div class="bg-warning">bg-warning</div>
<div class="bg-info">bg-info</div>
<div class="bg-light">bg-light</div>
<div class="bg-dark">bg-dark</div>
<div class="bg-body">bg-body</div>
<div class="bg-white">bg-white</div>
<div class="bg-transparent">bg-transparent</div>

bootstrap color

primary - #007bff
secondary - #6c757d
success - #28a745
danger - #dc3545
warning - #ffc107
info - #17a2b8
light - #f8f9fa
dark - #343a40
muted - #6c757d
white - #ffffff

bootstrtap primary color

.bg-primary{
	background-color: rgb(0,123,255);
}

bootstrap 4 text color

<p class="text-primary">Text with primary color</p>
<p class="text-secondary">Text with secondary color</p>
<p class="text-success">Text with success color</p>
<p class="text-danger">Text with danger color</p>
<p class="text-warning">Text with warning color</p>
<p class="text-info">Text with info color</p>
<p class="text-light bg-dark">Text with light color</p>
<p class="text-dark">Text with dark color</p>
<p class="text-muted">Text with muted color</p>
<p class="text-white bg-dark">Text with white color</p>

bootstrap colours

Primary. #0275d8. Success. #5cb85c. Info. #5bc0de. Warning. #f0ad4e

bootstrap 5 font color

<p class="text-primary">text-primary</p>
<p class="text-secondary">text-secondary</p>
<p class="text-success">text-success</p>
<p class="text-danger">text-danger</p>
<p class="text-warning">text-warning</p>
<p class="text-info">text-info</p>
<p class="text-light bg-dark">text-light</p>
<p class="text-dark">text-dark</p>
<p class="text-muted">text-muted</p>
<p class="text-white bg-dark">text-white</p>

colors bootstrap

<p class="text-primary">.text-primary</p>
<p class="text-secondary">.text-secondary</p>
<p class="text-success">.text-success</p>
<p class="text-danger">.text-danger</p>
<p class="text-warning bg-dark">.text-warning</p>
<p class="text-info bg-dark">.text-info</p>
<p class="text-light bg-dark">.text-light</p>
<p class="text-dark">.text-dark</p>
<p class="text-body">.text-body</p>
<p class="text-muted">.text-muted</p>
<p class="text-white bg-dark">.text-white</p>
<p class="text-black-50">.text-black-50</p>
<p class="text-white-50 bg-dark">.text-white-50</p>

bootstrap bg classes

<!-- On rows -->
<tr class="bg-primary">...</tr>
<tr class="bg-success">...</tr>
<tr class="bg-warning">...</tr>
<tr class="bg-danger">...</tr>
<tr class="bg-info">...</tr>

<!-- On cells (`td` or `th`) -->
<tr>
  <td class="bg-primary">...</td>
  <td class="bg-success">...</td>
  <td class="bg-warning">...</td>
  <td class="bg-danger">...</td>
  <td class="bg-info">...</td>
</tr>

Bootstrap Text Colors Example

<p class="text-primary">It's primary text message</p>
        <p class="text-secondary">It's secondary text message</p>
        <p class="text-success">It's success text message</p>
        <p class="text-danger">It's danger text message</p>
        <p class="text-warning">It's warning text message</p>
        <p class="text-info">It's info text message</p>
        <p class="text-light bg-dark">It's light text message</p>
        <p class="text-dark">It's dark text message</p>
        <p class="text-muted">It's muted text message</p>

background color bootstrap

<div class="card bg-dark text-white">

bootstrap color a div

use something like :
<div class="container alert alert-success">
   <div class="row">
      <div class="col">I'm your content inside the grid!</div>
   </div>
</div>

change bootstrap background color

<style type="text/css">
   body { background: navy !important; } /* Adding !important forces the browser to overwrite the default style applied by Bootstrap */
</style>

bootstrap bg classes

<!-- On rows -->
<tr class="bg-primary">...</tr>
<tr class="bg-success">...</tr>
<tr class="bg-warning">...</tr>
<tr class="bg-danger">...</tr>
<tr class="bg-info">...</tr>

<!-- On cells (`td` or `th`) -->
<tr>
  <td class="bg-primary">...</td>
  <td class="bg-success">...</td>
  <td class="bg-warning">...</td>
  <td class="bg-danger">...</td>
  <td class="bg-info">...</td>
</tr>

text-muted

<h3>
  Fancy display heading
  <small class="text-muted">With faded secondary text</small>
</h3>

Bootstrap Colors

aliceblue (`#f0f8ff`)
antiquewhite (`#faebd7`)
aqua (`#00ffff`)
aquamarine (`#7fffd4`)
azure (`#f0ffff`)
beige (`#f5f5dc`)
bisque (`#ffe4c4`)
black (`#000000`)
blanchedalmond (`#ffebcd`)
blue (`#0000ff`)
blueviolet (`#8a2be2`)
brown (`#a52a2a`)
burlywood (`#deb887`)
cadetblue (`#5f9ea0`)
chartreuse (`#7fff00`)
chocolate (`#d2691e`)
coral (`#ff7f50`)
cornflowerblue (`#6495ed`)
cornsilk (`#fff8dc`)
crimson (`#dc143c`)
cyan (`#00ffff`)
darkblue (`#00008b`)
darkcyan (`#008b8b`)
darkgoldenrod (`#b8860b`)
darkgray (`#a9a9a9`)
darkgreen (`#006400`)
darkgrey (`#a9a9a9`)
darkkhaki (`#bdb76b`)
darkmagenta (`#8b008b`)
darkolivegreen (`#556b2f`)
darkorange (`#ff8c00`)
darkorchid (`#9932cc`)
darkred (`#8b0000`)
darksalmon (`#e9967a`)
darkseagreen (`#8fbc8f`)
darkslateblue (`#483d8b`)
darkslategrey (`#2f4f4f`)
darkturquoise (`#00ced1`)
darkviolet (`#9400d3`)
deeppink (`#ff1493`)
deepskyblue (`#00bfff`)
dimgray (`#696969`)
dimgrey (`#696969`)
dodgerblue (`#1e90ff`)
firebrick (`#b22222`)
floralwhite (`#fffaf0`)
forestgreen (`#228b22`)
fuchsia (`#ff00ff`)
gainsboro (`#dcdcdc`)
ghostwhite (`#f8f8ff`)
gold (`#ffd700`)
goldenrod (`#daa520`)
gray (`#808080`)
green (`#008000`)
greenyellow (`#adff2f`)
grey (`#808080`)
honeydew (`#f0fff0`)
hotpink (`#ff69b4`)
indianred (`#cd5c5c`)
indigo (`#4b0082`)
ivory (`#fffff0`)
khaki (`#f0e68c`)
lavender (`#e6e6fa`)
lavenderblush (`#fff0f5`)
lawngreen (`#7cfc00`)
lemonchiffon (`#fffacd`)
lightblue (`#add8e6`)
lightcoral (`#f08080`)
lightcyan (`#e0ffff`)
lightgoldenrodyellow (`#fafad2`)
lightgray (`#d3d3d3`)
lightgreen (`#90ee90`)
lightgrey (`#d3d3d3`)
lightpink (`#ffb6c1`)
lightsalmon (`#ffa07a`)
lightseagreen (`#20b2aa`)
lightskyblue (`#87cefa`)
lightslategrey (`#778899`)
lightsteelblue (`#b0c4de`)
lightyellow (`#ffffe0`)
lime (`#00ff00`)
limegreen (`#32cd32`)
linen (`#faf0e6`)
magenta (`#ff00ff`)
maroon (`#800000`)
mediumaquamarine (`#66cdaa`)
mediumblue (`#0000cd`)
mediumorchid (`#ba55d3`)
mediumpurple (`#9370db`)
mediumseagreen (`#3cb371`)
mediumslateblue (`#7b68ee`)
mediumspringgreen (`#00fa9a`)
mediumturquoise (`#48d1cc`)
mediumvioletred (`#c71585`)
midnightblue (`#191970`)
mintcream (`#f5fffa`)
mistyrose (`#ffe4e1`)
moccasin (`#ffe4b5`)
navajowhite (`#ffdead`)
navy (`#000080`)
oldlace (`#fdf5e6`)
olive (`#808000`)
olivedrab (`#6b8e23`)
orange (`#ffa500`)
orangered (`#ff4500`)
orchid (`#da70d6`)
palegoldenrod (`#eee8aa`)
palegreen (`#98fb98`)
paleturquoise (`#afeeee`)
palevioletred (`#db7093`)
papayawhip (`#ffefd5`)
peachpuff (`#ffdab9`)
peru (`#cd853f`)
pink (`#ffc0cb`)
plum (`#dda0dd`)
powderblue (`#b0e0e6`)
purple (`#800080`)
rebeccapurple (`#663399`)
red (`#ff0000`)
rosybrown (`#bc8f8f`)
royalblue (`#4169e1`)
saddlebrown (`#8b4513`)
salmon (`#fa8072`)
sandybrown (`#f4a460`)
seagreen (`#2e8b57`)
seashell (`#fff5ee`)
sienna (`#a0522d`)
silver (`#c0c0c0`)
skyblue (`#87ceeb`)
slateblue (`#6a5acd`)
slategray (`#708090`)
snow (`#fffafa`)
springgreen (`#00ff7f`)
steelblue (`#4682b4`)
tan (`#d2b48c`)
teal (`#008080`)
thistle (`#d8bfd8`)
tomato (`#ff6347`)
turquoise (`#40e0d0`)
violet (`#ee82ee`)
wheat (`#f5deb3`)
white (`#ffffff`)
whitesmoke (`#f5f5f5`)
yellow (`#ffff00`)
yellowgreen (`#9acd32`)

change text color in bootstrap

There are pre-defined Colors in Bootstrap. 
Learn More about their color classes in their docs section.

<p class="text-success">Success.</p>

bootstrap custom background color

Write a function xor that takes two Boolean values. If both values are different, the result should be true. If both values are the same, the result should be false.