Triangle below header that seamlessly blends with header background gradient

Question

Triangle below header that seamlessly blends with header background gradient

I need to create a unique header design which includes a gradient and a triangle for decoration. While I have no trouble implementing the gradient and positioning the triangle using ::after, I am facing an issue with matching the color of the triangle to the changing background gradient. The challenge arises because the gradient is not consistent across all devices, resulting in varying shades. As a result, I am unsure how to dynamically adjust the triangle color to match the gradient. Any assistance or suggestions on how to achieve this would be greatly appreciated. Thank you.

css linear-gradients

Answer 1

Answer №1

One way to mask the header is by utilizing the clip-path property:

header {
  height: 70px;
  width: 100%;
  clip-path: polygon(0 0, 100% 0, 100% 60px, calc(100% - 40px) 60px, calc(100% - 60px) 70px, calc(100% - 80px) 60px, 0 60px);
  background-image: linear-gradient(to right, #3f5efb, #fc466b);
}

<header></header>

If you go with this method, it's important to provide fallbacks for browsers that do not support the clip-path feature.

Answer 2

One way to mask the header is by utilizing the clip-path property:

header {
  height: 70px;
  width: 100%;
  clip-path: polygon(0 0, 100% 0, 100% 60px, calc(100% - 40px) 60px, calc(100% - 60px) 70px, calc(100% - 80px) 60px, 0 60px);
  background-image: linear-gradient(to right, #3f5efb, #fc466b);
}

<header></header>

If you go with this method, it's important to provide fallbacks for browsers that do not support the clip-path feature.

Answer 3

Answer №2

Here is a different approach that doesn't rely on the clip-path property:

.container {
  height:50px;
  background:linear-gradient(to right,purple,red);
  background-attachment:fixed; /*This will create the effect*/
  position:relative;
}
.container:before {
  content:"";
  position:absolute;
  width:20px;
  height:20px;
  background:linear-gradient(to right,purple,red);
  background-attachment:fixed; /*This will create the effect*/
  transform:rotate(45deg);
  right:20px;
  bottom:-10px;
  animation:slide 5s infinite alternate linear;
}

@keyframes slide {
  from {
     right:20px;
  }
  to {
    right:calc(100% - 40px);
  }
}

<div class="container"></div>

UPDATE

The previous solution does not work in Firefox because of a bug with background-attachment:fixed and the usage of transform. Here is an alternative method that should be compatible:

.container {
  height:50px;
  background:linear-gradient(to right,purple,red);
  background-attachment:fixed; /*This will create the effect*/
  position:relative;
}
.container:before {
  content:"";
  position:absolute;
  width:20px;
  height:10px;
  background:
  linear-gradient(to right,purple,red);
  background-attachment:fixed; /*This will create the effect*/
  right:20px;
  bottom:-10px;
  animation:slide 5s infinite alternate linear;
}
.container:after {
  content:"";
  position:absolute;
  z-index:2;
  width:20px;
  height:10px;
  background:
  linear-gradient(to bottom right,transparent 50%,white 51%)100% 0/50% 100% no-repeat,
  linear-gradient(to bottom left,transparent 50%,white 51%)0 0/50% 100% no-repeat;
  right:20px;
  bottom:-10px;
  animation:slide 5s infinite alternate linear;
}

@keyframes slide {
  from {
     right:20px;
  }
  to {
    right:calc(100% - 40px);
  }
}

<div class="container"></div>

Answer 4

Here is a different approach that doesn't rely on the clip-path property:

.container {
  height:50px;
  background:linear-gradient(to right,purple,red);
  background-attachment:fixed; /*This will create the effect*/
  position:relative;
}
.container:before {
  content:"";
  position:absolute;
  width:20px;
  height:20px;
  background:linear-gradient(to right,purple,red);
  background-attachment:fixed; /*This will create the effect*/
  transform:rotate(45deg);
  right:20px;
  bottom:-10px;
  animation:slide 5s infinite alternate linear;
}

@keyframes slide {
  from {
     right:20px;
  }
  to {
    right:calc(100% - 40px);
  }
}

<div class="container"></div>

UPDATE

The previous solution does not work in Firefox because of a bug with background-attachment:fixed and the usage of transform. Here is an alternative method that should be compatible:

.container {
  height:50px;
  background:linear-gradient(to right,purple,red);
  background-attachment:fixed; /*This will create the effect*/
  position:relative;
}
.container:before {
  content:"";
  position:absolute;
  width:20px;
  height:10px;
  background:
  linear-gradient(to right,purple,red);
  background-attachment:fixed; /*This will create the effect*/
  right:20px;
  bottom:-10px;
  animation:slide 5s infinite alternate linear;
}
.container:after {
  content:"";
  position:absolute;
  z-index:2;
  width:20px;
  height:10px;
  background:
  linear-gradient(to bottom right,transparent 50%,white 51%)100% 0/50% 100% no-repeat,
  linear-gradient(to bottom left,transparent 50%,white 51%)0 0/50% 100% no-repeat;
  right:20px;
  bottom:-10px;
  animation:slide 5s infinite alternate linear;
}

@keyframes slide {
  from {
     right:20px;
  }
  to {
    right:calc(100% - 40px);
  }
}

<div class="container"></div>

Triangle below header that seamlessly blends with header background gradient

Answer №1

Answer №2

Similar questions

Disabling Sidebars on Blog Articles Exclusively for Mobile Devices

Issue with rendering <li> elements in Firefox browser detected

Steps to turn off Bootstrap's fixed navigation on mobile devices

Setting the height of a box-inner div to full height in Bootstrap 4: A guide

Tips for Removing Scrollbars on Mobile Devices

Tips on how to prevent a video from playing in the background of a popup even after it has been closed

Using Wordpress? Customize your sidebar with three widgets and don't forget to add the "last" class to the third one for a polished look

Dilemma in CSS: The debate between using padding shorthand or writing out the padding

Top method for achieving a smooth transition in a loading CSS3 animation

The text in the image caption has been drastically reduced along with the size of the image

The image inside an Ionic card's header will automatically adjust its size when text is added

What is the best way to adjust the size of the footer container?

What is causing the button to prevent file selection?

Step-by-step guide on incorporating Google Fonts and Material Icons into Vue 3 custom web components

Ways to modify color while user moves the screen

Adjust Navbar Header Color Based on Screen Size

Box-free calendar dash component

My media queries refuse to cooperate until I add the magical "!important" declaration

I am interested in displaying all the items on the list instead of just one

Customizing Eclipse Outline View for Cascading Style Sheets (CSS) Files