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CSS Basics

Introduction Syntax Selectors Attribute Selectors Specificity Combinators !important Comments Colors

CSS Need to Know

Box Model Pseudo-class Pseudo-element Inline-block Math Functions Max and Min Opacity Outline Overflow Z-index Float

Most used

Align Backgrounds Borders Text Units Padding Margins Position Tables Display Fonts Lists Height and Width

CSS Reference

CSS Properties reference

CSS Properties

@charset @font-face @import @keyframes @media accent-color align-content align-items align-self all animation animation-delay animation-direction animation-duration animation-fill-mode animation-iteration-count animation-name animation-play-state animation-timing-function aspect-ratio backdrop-filter backface-visibility background background-attachment background-blend-mode background-clip background-color background-image background-origin background-position-x background-position-y background-position background-repeat background-size block-size border border-block-color border-block-end-color border-block-end-style border-block-end-width border-block-end border-block-start-color border-block-start-style border-block-start-width border-block-start border-block-style border-block-width border-block border-bottom-color border-bottom-left-radius border-bottom-right-radius border-bottom-style border-bottom-width border-bottom border-collapse border-color border-end-end-radius border-end-start-radius border-image-outset border-image-repeat border-image-slice border-image-source border-image-width border-image border-inline-color border-inline-end-color border-inline-end-style border-inline-end-width border-inline-end border-inline-start-color border-inline-start-style border-inline-start-width border-inline-start border-inline-style border-inline-width border-inline border-left-color border-left-style border-left-width border-left border-radius border-right-color border-right-style border-right-width border-right border-spacing border-start-end-radius border-start-start-radius border-style border-top-color border-top-left-radius border-top-right-radius border-top-style border-top-width border-top border-width bottom box-decoration-break box-reflect box-shadow box-sizing break-after break-before break-inside caption-side caret-color clear clip-path clip color color-scheme columns column-count column-fill column-gap column-rule-color column-rule-style column-rule-width column-rule column-span column-width content counter-increment counter-reset counter-set cursor direction display empty-cells filter flex-basis flex-direction flex-flow flex-grow flex-shrink flex-wrap flex float font font-family font-feature-settings font-kerning font-size-adjust font-size font-stretch font-style font-variant-caps font-variant font-weight gap grid grid-area grid-auto-columns grid-auto-flow grid-auto-rows grid-column-end grid-column-start grid-column grid-row-end grid-row-start grid-row grid-template-areas grid-template-columns grid-template-rows grid-template hanging-punctuation height hyphenate-character hyphens image-rendering initial-letter inline-size inset inset-block-end inset-block-start inset-block inset-inline-end inset-inline-start inset-inline isolation justify-content justify-items justify-self left letter-spacing line-height list-style list-style-image list-style-position list-style-type margin margin-block-end margin-block-start margin-block margin-bottom margin-inline-end margin-inline-start margin-inline margin-left margin-right margin-top marker marker-end marker-mid marker-start mask mask-clip mask-composite mask-image mask-mode mask-origin mask-position mask-repeat mask-size mask-type max-block-size max-height max-inline-size max-width min-block-size min-height min-inline-size min-width mix-blend-mode object-fit object-position offset offset-anchor offset-distance offset-path offset-position offset-rotate opacity order orphans outline outline-color outline-offset outline-style outline-width overflow overflow-anchor overflow-wrap overflow-x overflow-y overscroll-behavior overscroll-behavior-block overscroll-behavior-inline overscroll-behavior-x overscroll-behavior-y padding-block padding-block-end padding-block-start padding-bottom padding-inline-end padding-inline-start padding-inline padding-left padding-right padding-top padding page-break-after page-break-before page-break-inside paint-order perspective-origin perspective place-content place-items place-self pointer-events position Properties_introduction quotes resize right rotate row-gap scale scroll-behavior scroll-margin scroll-margin-block-end scroll-margin-block-start scroll-margin-block scroll-margin-bottom scroll-margin-inline-end scroll-margin-inline-start scroll-margin-inline scroll-margin-left scroll-margin-right scroll-margin-top scroll-padding scroll-padding-block-end scroll-padding-block-start scroll-padding-block scroll-padding-bottom scroll-padding-inline-end scroll-padding-inline-start scroll-padding-inline scroll-padding-left scroll-padding-right scroll-padding-top scroll-snap-align scroll-snap-stop scroll-snap-type scrollbar-color tab-size table-layout text-align text-align-last text-decoration text-decoration-color text-decoration-line text-decoration-style text-decoration-thickness text-emphasis-color text-emphasis-position text-emphasis-style text-emphasis text-indent text-justify text-orientation text-overflow text-shadow text-transform text-underline-offset text-underline-position top transform transform-origin transform-style transition transition-delay transition-duration transition-property transition-timing-function translate unicode-bidi user-select vertical-align visibility white-space widows width word-break word-spacing word-wrap writing-mode z-index zoom
CSS Pseudo-Classes reference CSS Pseudo-Elements reference CSS Selector reference

Pseudo Classes

active any-link autofill blank_ checked current default defined dir disabled empty enabled first-child first-of-type focus-visible focus-within focus fullscreen future has host-context host hover in-range indeterminate invalid is lang last-child last-of-type left link local-link modal not nth-child nth-last-child nth-last-of-type nth-of-type only-child only-of-type optional out-of-range paused picture-in-picture placeholder-shown playing read-only read-write required root scope target-within target user-invalid valid visited where

Pseudo-Element

after before first-letter first-line

CSS border-bottom-color

The CSS border-bottom-color property is used to set the color of the bottom border of an element. This property can be specified using a color name, RGB value, hex value, or other CSS color formats.

Let's see how the border-bottom-color property works with some examples:

    <div style="border-bottom: 2px solid blue;">This is a blue bottom border.</div>
Result:
This is a blue bottom border.

In the example above, we set the border-bottom-color property to blue using a color name. The bottom border of the <div> element is now blue.


    <div style="border-bottom: 2px solid rgb(255, 0, 0);">This is a red bottom border.</div>
Result:
This is a red bottom border.

In this example, we used an RGB value to set the border-bottom-color property to red. The bottom border of the <div> element is now red.


    <div style="border-bottom: 2px solid #00ff00;">This is a green bottom border.</div>
Result:
This is a green bottom border.

Finally, in this example, we used a hex value to set the border-bottom-color property to green. The bottom border of the <div> element is now green.

Experiment with different color values and see how they affect the bottom border of elements on your webpage!