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Quieting Plavi

#404b66
Notes

Quieting Plavi (#404B66) is a deep azure 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 (223°, 23%, 33%) places it in the muted band at a dark lightness. It works well as a headline, icon, or deep background in an otherwise light layout, pairing cleanly with cream, bone, and warm neutrals. 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
#404b66
RGB
rgb(64, 75, 102)
HSL
hsl(223, 23%, 33%)
HWB
hwb(223 25% 60%)
OKLCH
oklch(41.5% 0.048 267.2)
P3
color(display-p3 0.2593 0.2928 0.3914)
HSV
hsv(223, 37%, 40%)
LAB
lab(31.99% 3.00 -17.14)
LCH
lch(31.99% 17.41 279.94)
CMYK
cmyk(37%, 26%, 0%, 60%)

Etymology

Quieting
adjective

Latin quiētus, quiet — present-participle of quiet. As a color modifier, quieting implies a hushed-and-soothing-and-calming quality where the hue carries the visual register of gradually-calming-and-quieting ambient-environment color-treatment. Sits at the hushed-and-soft end of the grid, parallel to softening and muting in usage.

Plavi
noun

The Serbo-Croatian word for blue — used across Bosnia, Croatia, Serbia, and Montenegro for the saturated deep blue of Adriatic water and traditional folk-embroidery. The color refers to plavi embroidery thread on Croatian čilim rug: a saturated, slightly cool deep blue with the matte finish of dyed wool thread.

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.

#404b66
Original
#424d67
Protanopia
#3f4a65
Deuteranopia
#355054
Tritanopia
#4b4b4b
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
8.69:1
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
2.42:1

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
##404B66
Display P3
Display P3
color(display-p3 0.2593 0.2928 0.3914)
Inside sRGBOKLCH chroma 0.048

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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