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Disciplined Pasqueflower

#644a9b
Notes

Disciplined Pasqueflower (#644A9B) 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 (259°, 35%, 45%) 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
#644a9b
RGB
rgb(100, 74, 155)
HSL
hsl(259, 35%, 45%)
HWB
hwb(259 29% 39%)
OKLCH
oklch(47.6% 0.127 296.0)
P3
color(display-p3 0.3765 0.2943 0.5888)
HSV
hsv(259, 52%, 61%)
LAB
lab(37.79% 29.77 -40.52)
LCH
lch(37.79% 50.28 306.31)
CMYK
cmyk(35%, 52%, 0%, 39%)

Etymology

Disciplined
adjective

Latin disciplīna, teaching / training — past-participle of discipline. As a color modifier, disciplined implies a clear-and-controlled-and-careful quality where the hue carries the visual register of careful-edited-and-restrained design-decision. Sits at the crisp-and-orderly end of the grid, parallel to methodical and orderly in usage.

Pasqueflower
noun

Eurasian Pulsatilla vulgarisEaster flower in Old English from its mid-spring Pasch / pascha (Easter) blooming season across European chalk grassland. Pasqueflower color refers to a fully opened Pulsatilla vulgaris sepal-cup: a saturated, slightly cool deep blue-violet with the silky finish of long-haired sepals around a yellow-stamened center. The plant is the floral emblem of South Dakota.

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

Click any swatch to explore

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.

#644a9b
Original
#2b599e
Protanopia
#315899
Deuteranopia
#575a6b
Tritanopia
#555555
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
7.01:1
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
2.99:1

Wide gamut

Display P3 representation

The CSS Color 4 wide-gamut form of this color. Both swatches render the same color on every display — the P3 form only diverges from sRGB when a designer pushes channels outside sRGB's reach.

sRGB hex
sRGB hex
##644A9B
Display P3
Display P3
color(display-p3 0.3765 0.2943 0.5888)
P3 has subtle headroomOKLCH chroma 0.127

Moderately saturated colors gain a small bump in P3 — the difference is usually visible side-by-side on wide-gamut hardware but won't change the character of the color.

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