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Curbed Konpeki

#425168
Notes

Curbed Konpeki (#425168) 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 (216°, 22%, 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
#425168
RGB
rgb(66, 81, 104)
HSL
hsl(216, 22%, 33%)
HWB
hwb(216 26% 59%)
OKLCH
oklch(43.2% 0.043 258.8)
P3
color(display-p3 0.2704 0.3159 0.4001)
HSV
hsv(216, 37%, 41%)
LAB
lab(34.07% 0.41 -15.19)
LCH
lch(34.07% 15.20 271.53)
CMYK
cmyk(37%, 22%, 0%, 59%)

Etymology

Curbed
adjective

Old French courbe, curb / bend — past-participle of curb. As a color modifier, curbed implies a hushed-and-bridled-and-restrained quality where the hue carries the visual register of intentionally-restrained-and-bridled color-amplitude limitation. Sits at the hushed-and-restrained end of the grid, parallel to bridled and restrained in usage.

Konpeki
noun

Japanese konpeki (紺碧) — the saturated deep azure of clear ocean and sky. The compound combines kon (deep blue) and heki (jade-blue), naming a color deeper than aozora and brighter than ruri. The color refers to konpeki-painted Edo-period folding screens: a saturated, slightly cool deep blue with the matte finish of pigment in tempera.

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.

#425168
Original
#495269
Protanopia
#454e67
Deuteranopia
#365659
Tritanopia
#4f4f4f
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
8.05:1
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
2.61:1

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
##425168
Display P3
Display P3
color(display-p3 0.2704 0.3159 0.4001)
Inside sRGBOKLCH chroma 0.043

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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