Card theme colors are all "white" on dark themes

[ArcanoxDragon]

Describe the bug When using a dark-palette theme, cards using the "theme" colors (e.g. k-card-error) have a white background instead of the appropriate theme color background.

To reproduce Steps to reproduce the behavior:

1. Go to this Dojo
2. Click Run
3. Observe that the first card has an "error" background (light red)
4. Change the <link> tag referencing the Kendo theme so that it uses the default-main-dark theme instead of default-main
5. Click Run again
6. Observe that the first card has a "white" background

Expected behavior The card should still appear tinted the appropriate color for the k-card-{color} class applied to it regardless of dark or light theme.

Screenshots Using default-main: Using default-main-dark:

Affected package (please remove the unneeded items)

• theme-default
• theme-bootstrap
• theme-material

Affected suites (please remove the unneeded items)

• Kendo UI for jQuery
• Kendo UI for Angular
• Kendo UI for React
• Kendo UI for Vue
• Telerik UI for Blazor

Affected browsers (please remove the unneeded items)

• Not Applicable

Build system information (please remove the unneeded items)

• Not Applicable

Additional context This bug appears to be a result of commit d6ad992e; the larger color step values for dark themes cause the k-color-tint function to hit full saturation on dark themes.