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Foreboding Goa

#640b4f
Notes

Foreboding Goa (#640B4F) is a deep magenta 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 (314°, 80%, 22%) places it in the highly saturated band at a dark 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 green. For something softer, pull in its analogous neighbors on either side of the wheel.

HEX
#640b4f
RGB
rgb(100, 11, 79)
HSL
hsl(314, 80%, 22%)
HWB
hwb(314 4% 61%)
OKLCH
oklch(34.6% 0.139 340.4)
HSV
hsv(314, 89%, 39%)
LAB
lab(21.99% 43.66 -17.26)
LCH
lch(21.99% 46.95 338.43)
CMYK
cmyk(0%, 89%, 21%, 61%)

Etymology

Foreboding
adjective

Old English fore-bēodan, to announce in advance — present-participle of forebode. As a color modifier, foreboding implies a deep-and-threatening atmospheric-anticipation quality, the dark cool-gray of advancing-cyclone storm-front cumulonimbus-base. Sits at the deep-and-threatening end of the grid, parallel to ominous and menacing in atmospheric tone.

Goa
noun

Indian Konkan-coast state — once a Portuguese colonial outpost (1510–1961) whose churches, fish-market stalls, and saris carry the gulābi deep-magenta of bandhani tie-dyed cotton. Goa color refers to a bandhani-tied magenta sari at a Goa fish-market stall: a saturated, slightly cool deep magenta with the matte finish of natural-dye-and-resist-tied cotton. Warmer than Bengali neel.

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.

#640b4f
Original
#142c51
Protanopia
#323a4d
Deuteranopia
#6b0f2d
Tritanopia
#232323
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
12.33:1
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
1.70:1

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