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Stimulating Titan Chartreuse

#64aa2c
Notes

Stimulating Titan Chartreuse (#64AA2C) is a true lime 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 (93°, 59%, 42%) 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 indigo. For something softer, pull in its analogous neighbors on either side of the wheel.

HEX
#64aa2c
RGB
rgb(100, 170, 44)
HSL
hsl(93, 59%, 42%)
HWB
hwb(93 17% 33%)
OKLCH
oklch(66.7% 0.171 134.4)
HSV
hsv(93, 74%, 67%)
LAB
lab(63.04% -42.89 54.55)
LCH
lch(63.04% 69.39 128.18)
CMYK
cmyk(41%, 0%, 74%, 33%)

Etymology

Stimulating
adjective

Latin stimulāns, spurring on — present-participle of stimulate, derived from stimulus (a goad). As a color modifier, stimulating implies a saturated-and-arousing-and-attentive quality where the hue increases visual-and-cognitive engagement. Sits at the bright-and-active end of the grid, parallel to invigorating and bracing in usage.

Titan
modifier

Greek Τιτάν, primeval-Titan-or-Saturn-moon. As a color modifier, titan implies a Saturn-moon-and-methane-haze-and-primeval quality, the visual register of Saturn-moon-Titan-and-Cassini-Huygens hand-Saturn-moon-and-methane-haze-and-primeval Saturn-moon-Titan-and-Cassini-Huygens-and-Kraken-Mare titan-and-Saturn-moon-and-methane-haze surfaces under Saturn-moon-Titan-and-Cassini-Huygens-and-Kraken-Mare orange-haze-and-cryo-volcano-and-methane-lake outer-system-light. Sits at the modifier-and-cosmic end of the grid, parallel to saturn and neptune in usage.

Chartreuse
noun

The yellow-green French liqueur made by Carthusian monks at the Grande Chartreuse monastery since 1737, from a recipe of 130 herbs known to only two living monks at any time. The color is the base spirit chartreuse jaune in a glass: a saturated, slightly green yellow that's brighter than lemon and warmer than lime. The liqueur gave the color its name, not the other way around.

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.

#64aa2c
Original
#b19c13
Protanopia
#a79638
Deuteranopia
#63a392
Tritanopia
#929292
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).
Failon White
2.87:1
The quick brown foxSample body text at normal size. The wcag minimum for body contrast is 4.5:1 (AA) or 7:1 (AAA).
AAAon Black
7.33:1

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