timer – C # Winforms The value 256 does not apply to red. Red should be greater than or equal to 0 and less than or equal to 255

I have a problem in which I try to create an rgb splash screen, but I receive the error message System.ArguementException: The value & # 39; 256 & # 39; is not a valid option for & # 39; red & # 39 ;. & # 39; red & # 39; should be greater than or equal to 0 and less than or equal to 255. This applies to all parts. Red, green and blue and I do not know how to fix it. I also tried rewriting the code, but nothing seems to work.

My code:

    int r = 244;
    int g = 65;
    int b = 65;


    private void Loader_Load(object sender, EventArgs e)
    {
         timerB.Start();
    }

    private void TimerR_Tick(object sender, EventArgs e)
    {
        if (b >= 244)
        {
            r -= 1;
            Label.ForeColor = Color.FromArgb(r, g, b);
            if (r <= 65)
            {
                timerR.Stop();
                timerG.Start();
            }
        }
        if (b <= 65)
        {
            r += 1;
            Label.ForeColor = Color.FromArgb(r, g, b);
            if (r >= 244)
            {
                timerR.Stop();
                timerG.Start();
            }
        }
    }

    private void TimerG_Tick(object sender, EventArgs e)
    {
        if (r <= 65)
        {
            g += 1;
            Label.ForeColor = Color.FromArgb(r, g, b);
            if (g >= 244)
            {
                timerG.Stop();
                timerB.Start();
            }
        }
        if (r >= 244)
        {
            g -= 1;
            Label.ForeColor = Color.FromArgb(r, g, b);
            if (g <= 65)
            {
                timerG.Stop();
                timerB.Start();
            }
        }
    }

    private void TimerB_Tick(object sender, EventArgs e)
    {
        if (g <= 65)
        {
            b += 1;
            Label.ForeColor = Color.FromArgb(r, g, b);
            if (b <= 65)
            {
                timerB.Stop();
                timerR.Start();
            }
        }
        if (g > -244)
        {
            b -= 1;
            Label.ForeColor = Color.FromArgb(r, g, b);
            if (b <= 255)
            {
                timerB.Stop();
                timerR.Start();
            }
        }
    }

}  

Website Design – Which color to choose as "Danger" if the main color of my app is red

COLOR LACK SIGNIFICANCE

Color alone does not convey meaning, and as such should not be considered an expression of "danger" or "warning." In addition, visual disturbances such as deuteranomalacy (6% of affected men) make certain color contrasts invisible, not to mention the cultural differences that several have mentioned.

CONTRAST, SYMBOLS and TEXT

Colors like red, yellow, orange were not chosen because the color has a specific meaning, but because the color offers a certain color contrast, brightness contrast and "eye-catching" and thus stands out from the background.

It is more important to have adequate brightness contrast and to use attention / attraction oriented symbols that are clear in purpose.

brightness contrast does not rely on color contrasts that may be misperceived due to impairments or cultural differences, and helps highlight the symbol. Using a higher luminance contrast than surrounding stimuli (text, buttons, etc.) increases attention and user focus.

color contrast can help raise awareness of cognitive detection of a warning, but this must be a secondary design consideration. For example, if the market is North America, green may be a bad choice for a warning – but green in combination with the opposing color red (including purple) produces a very strong edge detection in the normal human visual perception.

Understandable symbols It can be very useful to convey meanings in a way that (ideally) does not require translation. Here, too, cultural differences can have a strong influence.

In Las Vegas, the MGM Grand Hotel was originally designed to lead the main entrance through a huge, emerald-colored snapdragon. Shortly after opening the thought, they tore it off and rebuilt the entrance to remove the lion's mouth as they discovered that the mouth of a lion had a particularly negative symbolism in some Asian cultures.

In the field of computers, however, there are commonly used symbols that have achieved international acceptance of certain meanings – the well-informed is usually the better choice, especially for submitting a warning.

Text is king, Despite language differences. Clear and simple text is the best way to convey a specific meaning. A single word with a pop-up tool with additional information is my personal preference for usability.

Animation and movement will affect the attention if that is the goal. A single flashing red LED on a wall with 1000 red LEDs will surely grab your attention.

In short, it is more important to have good / high luminance contrast as well as descriptive text and symbols than any particular color combination.

Here's an example of using the luminance contrast, a modification of your example delete button versus the Save button:

SAVE DELETE CHANGED

Ag.algebraic geometry – Should the sentence with the red line in the proof of Theorem 2.1.6 be changed?

Enter image description here

In the proof of Theorem 2.1.6, I think that the sentence with the red line in "To prove our claim, it suffices to show that there is a maximal element $ ( mathcal F & # 39 ;, phi & # 39;) $ in the $ mathcal S $ so that $ mathcal F & # 39; & # 39; = mathcal F $", not true?

Do the colors red and green mean opposites?

In some cultures, red means stop and green lot – stop and go can be considered as a contrast. Is it really different in other cultures?

For example, suppose I want to display a screen with only two buttons, which may have different shapes and are each suitable for a different action. Action 1 and Action 2 are not opposites. Is it a good idea to turn one of the buttons green and the other red?

iMac / MAcOS Mojave 10.14.6 does not accept a correct password and displays a red dot in the top right corner

I can not log in to my iMac 2019 (Mojave 10.14.6) since today.
I am absolutely sure that I am using the correct password.
Everything worked fine until today, I did not change the password or installed new software.

If I enter the password, the wait icon will appear, stay for about 1 minute and then disappear, leaving the regular login page.
The only difference I mentioned was A red dot on the upper right edge (Right next to the clock, see picture below). No special message is displayed.

I can only use this iMac with a user account (the University's IT Desk manages the administrator account). Unfortunately, the system administrators will not be available until next week …

What I tried

  1. Booting in storage mode (by pressing the Shift key at startup) worked, but logon still does not work after rebooting
  2. Repair by booting in single-user mode (by pressing Command + S)
    Tap fsck -yf what was returned: The volume seems ok.

My questions

  1. What does the red dot on the top right of the login screen mean?

  2. Is there anything else I could try to find or fix the cause of this problem?

Red dop on the upper right edge

kvm virtualization – Kickstart installation does not start on Red Hat Linux (AWS)

I want to do a kickstart installation of Centos 7, but the VM will start up and I will be redirected to a manual text installation (which is successful).

I execute this comma to start the installation

virt-install --name centos7 --ram 2500 --disk path=/var/lib/libvirt/images/centos7.qcow2,size=8 --vcpus 1 --os-type linux --network bridge=virbr0 --graphics none --console pty,target_type=serial --location 'http://mirror.i3d.net/pub/centos/7/os/x86_64/' --initrd-inject=anaconda-ks.cfg  --extra-args 'console=ttyS0,115200n8 serial file:./anaconda-ks.cfg'

And here is the content of my anaconda-ks.cfg

Could you please help me?

#version=DEVEL
# System authorization information
auth --enableshadow --passalgo=sha512
# Install, not upgrade
install
url --url http://mirror.rackspace.com/CentOS/7/os/x86_64/
# Use graphical install
no graphical
# Run the Setup Agent on first boot
firstboot --enable
ignoredisk --only-use=vda
# Keyboard layouts
keyboard --vckeymap=fr-oss --xlayouts='fr (oss)'
# System language
lang fr_FR.UTF-8

# Network information
network  --bootproto=dhcp --device=eth0 --onboot=off --ipv6=auto --no-activate
network  --hostname=localhost.localdomain

# Root password
rootpw --iscrypted $6$ZHmnThmzueju.0jF$QGe7zbGuzSqKnSUW9eW7W7NIUP6T/Benhwrm4XxNDwbrPqGz5s5205MCvvGfJoRCXkQCEBIWvEvw.Q1BIBUax1
# System services
services --enabled="chronyd"
# System timezone
timezone Europe/Paris --isUtc
user --groups=wheel --name=niort --password=$6$QarIgmCGEUGB0ngM$ooa53.j3lObWuUr65L/JG53T29TpeLG5jRY7wOQsdQH5uVaeXrXytR/yhCFea9Fa2swxRS3pAp2iLhf/fDW3a/ --iscrypted --gecos="niort"
# System bootloader configuration
bootloader --append=" crashkernel=auto" --location=mbr --boot-drive=vda
autopart --type=lvm
# Partition clearing information
clearpart --none --initlabel

%packages
@^minimal
@core
chrony
kexec-tools

%end

%addon com_redhat_kdump --enable --reserve-mb='auto'

%end

%anaconda
pwpolicy root --minlen=6 --minquality=1 --notstrict --nochanges --notempty
pwpolicy user --minlen=6 --minquality=1 --notstrict --nochanges --emptyok
pwpolicy luks --minlen=6 --minquality=1 --notstrict --nochanges --notempty
%end

How can there be a red x next to "OneDrive" in File Explorer if no red x is displayed in the "Status column"?

In the figure above, to the left of "OneDrive" is a red x, but in the "Status" column, there is no red x.

My question is: How can this happen?

If the status is successful for all OneDrive files and folders, it is usually expected that the OneDrive item on the left side of File Explorer will not display a red X. However, this does not seem to be the case in the picture above.

Can you get green and red chromatic aberration?

I played in one of the hallucinating scenes in a video. The view is blurry and objects closer to the edges of the screen are green and red.

Now, the usual chromatic aberration patterns are purple / green and red / cyan, but are green and red possible by simply taking the picture? Is it also possible to take a photo that already has chromatic abberation artifacts, and then change the colors of the artifacts in Photoshop CS6?