Developed at Wagner's request at a time when the technical capabilities of modern brass instruments were being expanded, it enabled him to fill a gap in tone color between the mellow lyricism of the horns and the penetrating brilliance of the trombones.

WSJ: It Takes Brass to Play the Wagner Tuba | By Barbara Jepson | The Ring of the Nibelung

For women of color, the gap is even wider: African American women earn 66.5 cents and Latina women only 56.7 cents to the dollar earned by men.

FORBES: Equal Pay Day: 'Celebrate' By Spreading The Word

And the White House also notes that families of color are closing the homeownership gap with whites.

NPR: Is Housing Market Squeezing Out the Middle Class?

Yes, some of the disheartening statistics still persist: women make only 77 cents to the dollar for equal work, the pay gap is widest and most atrocious for women of color, and the damage stacks up incredibly over the length of our lifetimes.

FORBES: Negotiation Resources For Women Who Aren't Afraid To Ask

The graduation gap in some places between white students and classmates of color is 40 or 50 percent.

WHITEHOUSE: Helping America Become a ��Grad Nation��