com.netphantom.eclipse

Class ContrastAwareDarkMode

java.lang.Object

com.netphantom.eclipse.ContrastAwareDarkMode

public class ContrastAwareDarkMode
extends Object

Converts a palette of light-mode RGB colors from a light background to a dark background, preserving hue while adjusting luminance for readability.

The algorithm works by:

1. converting each color to HSL (Hue, Saturation, Lightness),
2. inverting the lightness relative to both backgrounds,
3. applying a vibrancy factor to control the intensity; and
4. converting back to RGB.

Author:

Christopher Mindus

Field Summary

Fields

Modifier and Type	Field and Description
static float	DEFAULT_VIBRANCY Default vibrancy for dark mode conversion: 0.85 gives a good visual result.

Constructor Summary

Constructors

Constructor and Description
ContrastAwareDarkMode()

Method Summary

Modifier and Type	Method and Description
static int	convertColor(int lightColor, int bgLight, int bgDark) Convert a single color from light to dark mode using default vibrancy.
static int	convertColor(int lightColor, int bgLight, int bgDark, float vibrancy) Convert a single color from light to dark mode with custom vibrancy.
static int[]	convertPalette(int[] lightColors, int bgLight, int bgDark) Convert a palette of colors from light to dark mode using default vibrancy.
static int[]	convertPalette(int[] lightColors, int bgLight, int bgDark, float vibrancy) Convert a palette of colors from light to dark mode with custom vibrancy.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

DEFAULT_VIBRANCY

public static final float DEFAULT_VIBRANCY

Default vibrancy for dark mode conversion: 0.85 gives a good visual result.

See Also:

Constant Field Values

Constructor Detail

ContrastAwareDarkMode

public ContrastAwareDarkMode()

Method Detail

convertPalette

public static int[] convertPalette(int[] lightColors,
                                   int bgLight,
                                   int bgDark)

Convert a palette of colors from light to dark mode using default vibrancy.

Parameters:

lightColors - Array of original RGB colors (0xRRGGBB), no alpha channel.

bgLight - Light theme background color (e.g., 0xFFFFFF for white).

bgDark - Dark theme background color (e.g., 0x1E1F22 for Eclipse Dark mode editors background color).

Returns:

Array of converted dark-mode colors.

convertPalette

public static int[] convertPalette(int[] lightColors,
                                   int bgLight,
                                   int bgDark,
                                   float vibrancy)

Convert a palette of colors from light to dark mode with custom vibrancy.

The vibrancy parameter controls how "bright" or "vivid" the converted colors appear:

• 1.00f = Full brightness inversion (maximum contrast).
• 0.85f = Slightly muted (recommended for most editors).
• 0.75f = More subdued, easier on the eyes.
• 0.50f = Very muted, low contrast.

Parameters:

lightColors - Array of original RGB colors (0xRRGGBB), no alpha channel.

bgLight - Light theme background color (e.g., 0xFFFFFF for white).

bgDark - Dark theme background color (e.g., 0x1E1F22 for Eclipse Dark mode editors background color).

vibrancy - Vibrancy factor (0.0 to 1.0). Controls color intensity in dark mode.

Returns:

Array of converted dark-mode colors.

convertColor

public static int convertColor(int lightColor,
                               int bgLight,
                               int bgDark)

Convert a single color from light to dark mode using default vibrancy.

Parameters:

lightColor - Original RGB color (0xRRGGBB), no alpha channel.

bgLight - Light theme background color (e.g., 0xFFFFFF for white).

bgDark - Dark theme background color (e.g., 0x1E1F22 for Eclipse Dark mode editors background color).

Returns:

Converted dark-mode color.

convertColor

public static int convertColor(int lightColor,
                               int bgLight,
                               int bgDark,
                               float vibrancy)

Convert a single color from light to dark mode with custom vibrancy.

Parameters:

lightColor - Original RGB color (0xRRGGBB), no alpha channel.

bgLight - Light theme background color (e.g., 0xFFFFFF for white).

bgDark - Dark theme background color (e.g., 0x1E1F22 for Eclipse Dark mode editors background color).

vibrancy - Vibrancy factor (0.0 to 1.0).

Returns:

Converted dark-mode color.