@Override
	public Object getCanonicalValue(IEditErrorHandler conversionErrorHandler) {
		Object canonicalValue;
		try {
			if (this.displayConverter != null) {
				//always do the conversion to check for valid entered data
				canonicalValue = this.displayConverter.displayToCanonicalValue(
						this.layerCell, this.configRegistry, getEditorValue());
			} else {
				canonicalValue = getEditorValue();
			}

			//if the conversion succeeded, remove error rendering if exists
			conversionErrorHandler.removeError(this);
		} catch (ConversionFailedException e) {
			// conversion failed
			conversionErrorHandler.displayError(this, e);
			throw e;
		} catch (Exception e) {
			// conversion failed
			conversionErrorHandler.displayError(this, e);
			throw new ConversionFailedException(e.getMessage(), e);
		}
		return canonicalValue;
	}

		configRegistry.registerConfigAttribute(
				CellConfigAttributes.DISPLAY_CONVERTER, null, DisplayMode.EDIT,
				COLOR_FIELD_NAME);