What is CSS's Default Border Color - css

Does anyone know what color CSS default the border color to? It's a dark grey but I want to use as a background color somewhere else but I can't figure out specifically what the color is.

Related

Change focus outline color based on background color

I'm currently working on a navbar (with a dark red background color) where the subsequent submenus have a light grey background color.
I'm using Scss and have managed to get the focus to work with the code bellow:
%focus {
#include focus-style(map-get($colors, "muted"), $focus-offset);
}
The color muted is connected to list of globally defined colors (in this case #636466) and focus-offset pulls the outline in by -2px.
The problem that arises is that there isn't enough contrast between the "muted" outline and the dark red background on the main navbar. I'm wondering how I'd go about adding a white outline when focus is on the main navbar and the "muted" color when it's on the grey submenus?

Javafx change color on sliding the slider

I'm trying to create an application where the theme or background color of the application changes on changing the slider position. The color changes within specific range of hex color codes.
For example: In Dark mode of an application, if I move the slider then background color changes to different shades of dark mode either brighter shades or darker shades of dark mode
use the valueProperty() method of the slider call .addListener(observable->{}) and in the {} set the background color according to the getValue() value of the slider. How you convert value to background color is left for u to figure out.

CSS overlay vs same looking other color

Strange I faced this question just now - are there any differences between css background color overlay and same looking color? For ex: designer designed buttons for hover, focus etc. On hover he wrote - overlay #FFF 15%. Now sice we use mixins and colors are hex, I have two choices - wrap element with other div or convert my rgba color rgba(255,255,255,0.15) to rgba #FFFFFF26 and use a pseudo class to apply it on hover.
It looks ugly, why not just other background color on hover?
I can get a hex color like this rgba(255,255,255,0.15) and it looks the same...
What are the benefits of overlay color (are there any?)?
If you have overlay with transparency then the background color will be seen through the overlay. If you apply directly on the button then what is behind it will show (in most cases white) so you have 2 different results

How to modify c3.js legend's text color

I am trying in vain to change the font color of a c3.js graph's legend.
With chrome's style inspector, i could change for example the font-size of the text but not the color.
Attaching a screenshot with the above mentioned properties (font-size and color).
Any hints please?
It is not color that you should change, instead change strokeor fill. See this tutorial for an explanation and difference between stroke and fill.
Add CSS styling for the legend item in your css file. Use fill instead of color because css property color is not valid here
.c3-legend-item {
fill: #9fabb1;
}

Changing background color and text

In the webform1 by using a color picker i have choosing a color.In the webform2 the color should be appeared as background color and if there is any letters or text in the webform2 it have to change as an opposite color.
for example:
background is black text is white.
background is blue text is red.
in a gmail settings themes are there if we change a theme background is different
color and text is another color.but in that themes colors are already fixed for background and text.but we using color picker
please advise me.
Thanks
This stack overflow question might have some answers for you.
Given a background color, how to get a foreground color that makes it readable on that background color?
Possible other solutions include:
Add picker for foreground color.
Create preset foreground colors for each available background color.

Resources