### Godot version

v4.3.dev.custom_build [d76c1d0e5]

### System information

Linux

### Issue description

When opening the color picker by clicking on a color property the color changes slightly.

### Steps to reproduce

* Click on a property with value `Color(.5, .5, .5) ` in the inspector
* Click away
* Open the color picker again
* See the color change to Color(0.502, 0.502, 0.502) in the "RAW" tab

### Minimal reproduction project

[ColorChangeBug.zip](https://github.com/godotengine/godot/files/13545089/ColorChangeBug.zip)

y = center.y + (center.y * Math::sin(h * Math_TAU) * s) - (theme_cache.picker_cursor->get_height() / 2);
		} else {
			real_t corner_x = (c == wheel_uv) ? center.x - Math_SQRT12 * c->get_size().width * 0.42 : 0;
			real_t corner_y = (c == wheel_uv) ? center.y - Math_SQRT12 * c->get_size().height * 0.42 : 0;
			Size2 real_size(c->get_size().x - corner_x * 2, c->get_size().y - corner_y * 2);
			x = CLAMP(real_size.x * s, 0, real_size.x) + corner_x - (theme_cache.picker_cursor->get_width() / 2);
			y = CLAMP(real_size.y - real_size.y * v, 0, real_size.y) + corner_y - (theme_cache.picker_cursor->get_height() / 2);
		}
		c->draw_texture(theme_cache.picker_cursor, Point2(x, y));
		col.set_hsv(h, 1, 1);
		if (actual_shape == SHAPE_HSV_WHEEL) {
			points.resize(4);
			double h1 = h - (0.5 / 360);
			double h2 = h + (0.5 / 360);
			points.set(0, Point2(center.x + (center.x * Math::cos(h1 * Math_TAU)), center.y + (center.y * Math::sin(h1 * Math_TAU))));
			points.set(1, Point2(center.x + (center.x * Math::cos(h1 * Math_TAU) * 0.84), center.y + (center.y * Math::sin(h1 * Math_TAU) * 0.84)));
			points.set(2, Point2(center.x + (center.x * Math::cos(h2 * Math_TAU)), center.y + (center.y * Math::sin(h2 * Math_TAU))));
			points.set(3, Point2(center.x + (center.x * Math::cos(h2 * Math_TAU) * 0.84), center.y + (center.y * Math::sin(h2 * Math_TAU) * 0.84)));
			c->draw_multiline(points, col.inverted());
		}
	} else if (p_which == 1) {
		if (actual_shape == SHAPE_HSV_RECTANGLE) {
			c->draw_set_transform(Point2(), -Math_PI / 2, Size2(c->get_size().x, -c->get_size().y));
			c->draw_texture_rect(theme_cache.color_hue, Rect2(Point2(), Size2(1, 1)));
			c->draw_set_transform(Point2(), 0, Size2(1, 1));
			int y = c->get_size().y - c->get_size().y * (1.0 - h);
			Color col;
			col.set_hsv(h, 1, 1);
			c->draw_line(Point2(0, y), Point2(c->get_size().x, y), col.inverted());
		} else if (actual_shape == SHAPE_OKHSL_CIRCLE) {