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Regal Loropetalum

#6333af
Notes

Regal Loropetalum (#6333AF) is a true indigo with an earthy character. It leans grounded and natural, the kind of color that plays well with wood, clay, linen, and warm neutrals. Its HSL profile (263°, 55%, 44%) places it in the balanced band at a mid lightness. It works across type, buttons, and borders, saturated enough to feel deliberate but balanced enough to not fight the rest of the palette. For a confident two-color system, pair it with its complementary lime. For something softer, pull in its analogous neighbors on either side of the wheel.

HEX
#6333af
RGB
rgb(99, 51, 175)
HSL
hsl(263, 55%, 44%)
HWB
hwb(263 20% 31%)
OKLCH
oklch(45.4% 0.185 295.8)
HSV
hsv(263, 71%, 69%)
LAB
lab(34.22% 48.00 -58.27)
LCH
lch(34.22% 75.49 309.48)
CMYK
cmyk(43%, 71%, 0%, 31%)

Etymology

Regal
adjective

Latin rēgālis, kingly — derived from rēx (king). As a color modifier, regal implies a saturated-and-royal-formality quality, the deep-rich color of British-Coronation-period royal vestment-and-mantle and Imperial-State-Crown regalia. Sits at the bold-and-imperial end of the grid, parallel to sovereign and royal in usage.

Loropetalum
noun

Asian Chinese fringe flower (Loropetalum chinense var. rubrum) — an evergreen shrub native to southern China cultivated worldwide for its strap-like fringed flowers and burgundy foliage. Loropetalum color refers to a L. chinense flush of fringed flowers on burgundy foliage: a saturated, slightly cool deep blue-violet with the velvet finish of dense ribbon-petal flowers. The genus name combines Greek loros (strap) and petalon (petal).

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

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Harmonies

Accessibility

Color-vision simulation

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.

#6333af
Original
#0051b3
Protanopia
#004fad
Deuteranopia
#4f526d
Tritanopia
#464646
Achromatopsia
WCAG contrast

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.

The quick brown foxSample body text at normal size. The wcag minimum for body contrast is 4.5:1 (AA) or 7:1 (AAA).
AAAon White
8.01:1
The quick brown foxSample body text at normal size. The wcag minimum for body contrast is 4.5:1 (AA) or 7:1 (AAA).
Failon Black
2.62:1

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