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Robust Episcia

#c63699
Notes

Robust Episcia (#C63699) is a true magenta with a cool character. It leans cool, sitting on the blue, green, and violet side of the wheel. Quiet and dependable, a fit for product UI and data visualization. Its HSL profile (319°, 57%, 49%) 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 green. For something softer, pull in its analogous neighbors on either side of the wheel.

HEX
#c63699
RGB
rgb(198, 54, 153)
HSL
hsl(319, 57%, 49%)
HWB
hwb(319 21% 22%)
OKLCH
oklch(58.0% 0.205 343.3)
HSV
hsv(319, 73%, 78%)
LAB
lab(48.19% 65.09 -22.02)
LCH
lch(48.19% 68.71 341.31)
CMYK
cmyk(0%, 73%, 23%, 22%)

Etymology

Robust
adjective

From the Latin robustus, of oak — implying strength combined with substance. As a color modifier, robust describes saturation combined with body: a robust burgundy, a robust olive. Sits in the bold-and-warm corner alongside strong and solid, with the slightly textural implication of a color that has substance behind the pigment.

Episcia
noun

South American flame violet (Episcia cupreata) — a Gesneriaceae understory perennial native to the Brazilian Atlantic Forest, with deep-magenta tubular flowers above iridescent copper-veined foliage. Episcia color refers to a fully opened Episcia cupreata tubular flower: a saturated, slightly cool deep magenta with the velvet finish of fresh fused-petaled tubular corolla. The genus name comes from the Greek episkios (shaded).

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.

#c63699
Original
#45639c
Protanopia
#717b96
Deuteranopia
#d33663
Tritanopia
#5c5c5c
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).
AAon White
4.78:1
The quick brown foxSample body text at normal size. The wcag minimum for body contrast is 4.5:1 (AA) or 7:1 (AAA).
AA Largeon Black
4.39:1

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