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Hoary Echinops

#636381
Notes

Hoary Echinops (#636381) is a true blue 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 (240°, 13%, 45%) places it in the muted 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 yellow. For something softer, pull in its analogous neighbors on either side of the wheel.

HEX
#636381
RGB
rgb(99, 99, 129)
HSL
hsl(240, 13%, 45%)
HWB
hwb(240 39% 49%)
OKLCH
oklch(51.1% 0.047 284.6)
P3
color(display-p3 0.3882 0.3882 0.4968)
HSV
hsv(240, 23%, 51%)
LAB
lab(43.00% 6.99 -16.67)
LCH
lch(43.00% 18.07 292.75)
CMYK
cmyk(23%, 23%, 0%, 49%)

Etymology

Hoary
adjective

Old English hār, gray-haired — adjectival suffix -y. As a color modifier, hoary implies a hushed-and-gray-aged-and-frosted quality where the hue carries the visual register of gray-haired-and-frosted multi-decade aged-and-respected period-correct color. Sits at the hushed-and-aged end of the grid, parallel to aged and frosted in usage.

Echinops
noun

Globe thistle (Echinops ritro) — Mediterranean and West-Asian Asteraceae prized for its perfectly spherical steel-blue capitula on grey-felted stems. Echinops color refers to a fully bloomed Echinops ritro sphere: a saturated, slightly cool deep blue-violet with the matte finish of dense radiating thistle disk-flowers on a globe receptacle. Drier and steelier than Allium, with the Greek genus name meaning hedgehog-faced.

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.

#636381
Original
#5b6682
Protanopia
#5a6580
Deuteranopia
#5c686d
Tritanopia
#656565
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).
AAon White
5.78:1
The quick brown foxSample body text at normal size. The wcag minimum for body contrast is 4.5:1 (AA) or 7:1 (AAA).
AA Largeon Black
3.63:1

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
##636381
Display P3
Display P3
color(display-p3 0.3882 0.3882 0.4968)
Inside sRGBOKLCH chroma 0.047

This color sits well within the sRGB cube. P3 and sRGB share the gray axis and most desaturated tones, so a P3 display renders this identically to an sRGB display.

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