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Stormy Schlumbergera

#640749
Notes

Stormy Schlumbergera (#640749) 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 (317°, 87%, 21%) 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
#640749
RGB
rgb(100, 7, 73)
HSL
hsl(317, 87%, 21%)
HWB
hwb(317 3% 61%)
OKLCH
oklch(34.1% 0.138 344.1)
HSV
hsv(317, 93%, 39%)
LAB
lab(21.37% 43.76 -14.15)
LCH
lch(21.37% 45.99 342.08)
CMYK
cmyk(0%, 93%, 27%, 61%)

Etymology

Stormy
adjective

Old English storm, storm — adjectival suffix -y. As a color modifier, stormy implies a deep-and-turbulent-and-cool-shifted quality, the dark cool-gray of Force-9-gale atmospheric-turbulence sky. Sits at the deep-and-turbulent end of the grid, parallel to thunderous and tempestuous in atmospheric register.

Schlumbergera
noun

Brazilian Christmas cactus (Schlumbergera × buckleyi) — a Cactaceae epiphytic cactus native to the Mata Atlântica coastal rainforest, with deep-magenta zygomorphic flowers that bloom in mid-winter. Schlumbergera color refers to a fully opened Schlumbergera × buckleyi terminal flower at Christmas: a saturated, slightly cool deep magenta with the velvet finish of fresh tubular zygomorphic corolla. Named for Frédéric Schlumberger, French cactus patron.

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.

#640749
Original
#162a4b
Protanopia
#333947
Deuteranopia
#6b0629
Tritanopia
#202020
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
12.59:1
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
1.67:1

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