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Healthful Powder

#10588b
Notes

Healthful Powder (#10588B) is a deep azure with a jewel character. It carries the deep, saturated richness of a gemstone. Authoritative and slightly formal, it works well for type and heavy UI elements. Its HSL profile (205°, 79%, 30%) places it in the highly saturated band at a dark lightness. Best used in small doses, like logos, CTAs, focus rings, or highlight text, where its saturation becomes a feature rather than noise. For a confident two-color system, pair it with its complementary orange. For something softer, pull in its analogous neighbors on either side of the wheel.

HEX
#10588b
RGB
rgb(16, 88, 139)
HSL
hsl(205, 79%, 30%)
HWB
hwb(205 6% 45%)
OKLCH
oklch(44.6% 0.107 246.0)
P3
color(display-p3 0.1584 0.3398 0.5294)
HSV
hsv(205, 88%, 55%)
LAB
lab(35.89% -1.30 -34.14)
LCH
lch(35.89% 34.17 267.82)
CMYK
cmyk(88%, 37%, 0%, 45%)

Etymology

Healthful
adjective

Old English hǣlth, health — adjectival suffix -ful. As a color modifier, healthful implies a clear-and-vital-and-wholesome quality where the hue carries the visual register of fresh-air-and-sunlight outdoor health-promoting environment. Sits at the crisp-and-wholesome end of the grid, parallel to salubrious and wholesome in usage.

Powder
noun

Talc — magnesium silicate ground to fine particles for personal hygiene since the nineteenth century. Powder blue refers to the pale, slightly green-shifted blue of mid-century Robin's-egg talc tins and the quilted cotton of newborn-boy nurseries: a soft, very pale blue with the matte finish of micron-scale particles. Lighter than periwinkle, warmer than ice, with the postwar consumer-goods association of a color tied to bath salts and powder rooms.

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.

#10588b
Original
#405a8d
Protanopia
#2e508a
Deuteranopia
#00646b
Tritanopia
#4c4c4c
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
7.52:1
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
2.79:1

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
##10588B
Display P3
Display P3
color(display-p3 0.1584 0.3398 0.5294)
P3 has subtle headroomOKLCH chroma 0.107

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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