Brilliant Yellow

Direct Yellow 4

Direct Yellow 4 is a chemical compound with the formula C26H18N4Na2O8S2. This is a direct dis-azo dye, a diamine derivative with separated azo groups. Due to its properties, value and strength, it is considered one of the most important dyes based on stilbene. It can be used as an acid-base indicator. In an alkaline environment, the yellow color of the dye deepens through orange to red at a pH of 6.4 → 8.0.

Yellow

Yellow is a color between green and orange on the spectrum of light. It is evoked by light with a dominant wavelength of roughly 575–585 nm. It is a primary color in subtractive color systems, used in painting or color printing. In the RGB color model, used to create colors on television and computer screens, yellow is a secondary color made by combining red and green at equal intensity. Carotenoids give the characteristic yellow color to autumn leaves, corn, canaries, daffodils, and lemons, as well as egg yolks, buttercups, and bananas. They absorb light energy and protect plants from photo damage in some cases. Sunlight has a slight yellowish hue when the Sun is near the horizon, due to atmospheric scattering of shorter wavelengths.

brilliant

Adjective

1. Shining brightly.
2. Both bright and saturated.

Noun

1. A finely cut gemstone, especially a diamond, cut in a particular form with numerous facets so as to maximize light return through the top (called "table") of the stone.
2. One of many hummingbird species of the genus Heliodoxa.

yellow

Noun

1. The color of sunflower petals and lemons; the color obtained by mixing green and red light, or by subtracting blue from white light; the color evoked by light of wavelength around 580 nm; one of the three primary colors in subtractive color systems.
2. The middle light in a set of three traffic lights, the lighting of which indicates that drivers should stop short of the intersection if it is safe to do so.

Adjective

1. Of a yellow hue.
2. Lacking courage.