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Softened Speedwell

#666d8c
Notes

Softened Speedwell (#666D8C) 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 (229°, 16%, 47%) 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 amber. For something softer, pull in its analogous neighbors on either side of the wheel.

HEX
#666d8c
RGB
rgb(102, 109, 140)
HSL
hsl(229, 16%, 47%)
HWB
hwb(229 40% 45%)
OKLCH
oklch(54.1% 0.049 274.7)
P3
color(display-p3 0.4050 0.4266 0.5392)
HSV
hsv(229, 27%, 55%)
LAB
lab(46.52% 4.75 -17.86)
LCH
lch(46.52% 18.48 284.89)
CMYK
cmyk(27%, 22%, 0%, 45%)

Etymology

Softened
adjective

Old English sōfte, soft — past-participle of soften. As a color modifier, softened implies a hushed-and-modulated-and-eased quality where the hue carries the visual register of edge-eased-and-tone-modulated softened-color treatment. Sits at the hushed-and-soft end of the grid, parallel to muffled and gentle in usage.

Speedwell
noun

Veronica chamaedrys, the small-flowered creeping speedwell of European hedgerows and lawn margins — named speedwell in folk Latin for its old reputation as a wound-healing herb. The color refers to a fresh speedwell flower: a saturated, slightly violet-shifted bright blue with the matte finish of a small four-petaled bloom. Cooler than periwinkle, warmer than cornflower, with the wildflower weight of a plant most often noticed by accident in a lawn.

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.

#666d8c
Original
#64708d
Protanopia
#616d8b
Deuteranopia
#5c7377
Tritanopia
#6e6e6e
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
5.08:1
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
4.13:1

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
##666D8C
Display P3
Display P3
color(display-p3 0.4050 0.4266 0.5392)
Inside sRGBOKLCH chroma 0.049

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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