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Fortified Purpurnyy

#642f94
Notes

Fortified Purpurnyy (#642F94) 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 (271°, 52%, 38%) 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
#642f94
RGB
rgb(100, 47, 148)
HSL
hsl(271, 52%, 38%)
HWB
hwb(271 18% 42%)
OKLCH
oklch(42.9% 0.160 304.6)
HSV
hsv(271, 68%, 58%)
LAB
lab(31.53% 43.24 -46.32)
LCH
lch(31.53% 63.37 313.03)
CMYK
cmyk(32%, 68%, 0%, 42%)

Etymology

Fortified
adjective

Latin fortificāre, to make strong — past-participle of fortify. As a color modifier, fortified implies a saturated-and-strengthened-and-defensive quality, the deep-rich color of Vauban-style military-fortification stone-and-earth rampart-and-bastion architecture. Sits at the bold-and-fortified end of the grid, parallel to bastioned and armored.

Purpurnyy
noun

Russian пурпурный, purple — derived from Latin purpura via Greek porphyra. The Russian Orthodox liturgical color for Pentecost and the deep-purple-and-gold iconostasis tradition. Purpurnyy color refers to a Russian Orthodox cathedral iconostasis royal-doors panel: a saturated, slightly cool deep violet with the matte finish of egg-tempera ultramarine-and-cinnabar on gilt gesso. Slightly cooler than Spanish púrpura.

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.

#642f94
Original
#004997
Protanopia
#0c4a92
Deuteranopia
#5b455d
Tritanopia
#424242
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
8.84:1
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
2.38:1

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