Highborn Sol Ruby
Highborn Sol Ruby (#A21323) is a true red with a jewel character. It carries the deep, saturated richness of a gemstone. Authoritative and slightly formal, it works well for type and heavy UI elements. Its HSL profile (353°, 79%, 35%) places it in the highly saturated band at a mid lightness. Best used in small doses, like logos, CTAs, focus rings, or highlight text, where its saturation becomes a feature rather than noise. For a confident two-color system, pair it with its complementary teal. For something softer, pull in its analogous neighbors on either side of the wheel.
Etymology
Old English hēah-boren, high-born — past-participle of bear. As a color modifier, highborn implies a saturated-and-aristocratic-and-elite quality, the deep-rich color of pre-modern English high-born aristocratic-class livery-and-armorial bearings. Sits at the bold-and-aristocratic end of the grid, parallel to noble and aristocratic in usage.
Latin sol, sun-and-Roman-sun-god. As a color modifier, sol implies a Roman-sun-god-and-stellar-disc quality, the visual register of Roman-Sol-Invictus-and-Apollo-sun hand-Roman-sun-god-and-stellar-disc Roman-Sol-Invictus-and-Apollo-sun-and-Helios-chariot sol-and-Roman-sun-god-and-stellar-disc surfaces under Roman-Sol-Invictus-and-Apollo-sun-and-Helios-chariot December-25-and-Helios-and-quadriga noon-stellar-disc-light. Sits at the modifier-and-zodiac end of the grid, parallel to luna and terra in usage.
From the Latin ruber — simply, red. The gemstone is a chromium-tinged corundum, harder than anything in nature except diamond, and so saturated that a fine Burmese pigeon's blood ruby at auction outpaces a comparable diamond by weight. The color borrows the gem's confidence: a clear, glassy red without the brown of garnet or the blue of crimson.
Closest matches
The nearest named color in three reference sources, ranked by perceptual distance (ΔE76 in CIELAB). ΔE < 1 is imperceptible to most viewers; ΔE > 10 is clearly different. When two sources point to the same hex they’re merged into one tile; click any to open that color’s page.
Variations
Click any swatch to exploreHarmonies
Accessibility
How this color appears to viewers with the four major color-vision-deficiency types. Computed via the Machado (2009) physiologically-based model. If a tile matches the original, the color reads the same to that viewer.
The color used as foreground text against pure white and pure black, with the contrast ratio and WCAG 2.1 grade. Aim for AA (4.5:1) for body text and AA Large (3:1) for 18 pt+ headlines; AAA (7:1) is the gold standard for long-form reading surfaces.