Modify Color dialog box

Used to modify a color. Opens when a color is double-clicked in the Color Table dialog box's Color Table or when a color is selected and then the Change button is clicked.

Modify Color dialog box

Its graphical, textual, and numerical controls let you select colors using a number of different color models. Because there is a direct relationship between the color models (they all define the same color, but in a different way), a change to any value in one model causes a change to one or more values in the other models.

Current Color Selection

As modifications are made, the color is shown in these tiles:

• Wireframe
— Shows the appearance of the color in a wireframe, wiremesh, polygon, or filled polygon display.

• Dithered
— An approximation of the color in a shaded model; lighting and material characteristics also affect color in shaded models. Clicking the OK button applies the color modification to the active color table.

A wide discrepancy may exist between the Wireframe and Dithered tiles, with the Dithered tile closer, in most cases, to the color defined using the controls in the dialog box. This discrepancy is caused by limitations on the number of colors that some graphics adapters can display. The Wireframe tile shows the displayable color closest to the defined color. For example, you can define hot pink using the controls in the dialog box, but red might appear in the tile because it is the closest displayable color. The Dithered tile, on the other hand, is derived by dithering (mixing displayable colors). For example, hot pink is dithered by mixing a small amount of blue with red.

Tint

The “rainbow” of colors below the tiles controls tint (hue and saturation). The left side of the rectangle is fully saturated with color; no whiteness is mixed in. To the right, the saturation level drops off as whiteness is added.

Within the rectangle, an inverse “X” pointer marks the selected tint. Dragging the pointer changes the tint.

The position of the pointer corresponds directly to the Hue and Saturation fields if HSV is chosen as the alternate color model.

Shade

The shade rectangle (to the right of the tint rectangle) controls shade or brightness for the specified tint. The rectangle ranges from all black at the bottom to the specified tint at the top with decreasing amounts of blackness along the way.

A horizontal bar that extends across the rectangle marks the selected brightness. Dragging the pointer vertically changes the brightness.

The position of the pointer corresponds directly to the Value field if HSV is chosen as the alternate color model.

Named Colors

You can select a standard X Window color in the list box.

Color Components

The color components control the relative amounts of red, green, and blue for each custom color.

Color Model

You can also set the color based on any of these color models. The models provide different ways to specify the same color; the color set is the same regardless of the model used.

RGB (red, green, and blue) — MicroStation's internal color model.

Control	Valid Range
Red	0 (no red) – 255 (full red)
Green	0 (no green) – 255 (full green)
Blue	0 (no blue) – 255 (full blue)

HSV (hue, saturation, and value) — The Hue, Saturation, and Value controls work similarly to a color TV's tint, contrast, and brightness controls, respectively. The HSV model is generally the most intuitive for those with no background in color theory.

Control	Valid Range
Hue	0–359
Saturation	0–100
Value	0–100

RGB (0-1) — The valid ranges of Red, Green, and Blue are 0-1.

CMY (cyan, magenta, and yellow) — The valid ranges of cyan, magenta, and yellow are 0-255. Cyan, magenta, and yellow, along with black, are the colors used in four-color process printing.