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Fortified Powder

#0589ed
Notes

Fortified Powder (#0589ED) is a true azure with a neon character. It sits at the high-saturation edge of its family. Use it sparingly, as signage, accent, or highlight against darker surfaces. Its HSL profile (206°, 96%, 47%) places it in the highly saturated band at a mid 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
#0589ed
RGB
rgb(5, 137, 237)
HSL
hsl(206, 96%, 47%)
HWB
hwb(206 2% 7%)
OKLCH
oklch(62.3% 0.178 250.8)
P3
color(display-p3 0.2366 0.5290 0.9009)
HSV
hsv(206, 98%, 93%)
LAB
lab(56.12% 6.42 -58.69)
LCH
lch(56.12% 59.04 276.24)
CMYK
cmyk(98%, 42%, 0%, 7%)

Etymology

Fortified
adjective

Latin fortificāre, to make strong — past-participle of fortify. As a color modifier, fortified implies a saturated-and-strengthened-and-defensive quality, the deep-rich color of Vauban-style military-fortification stone-and-earth rampart-and-bastion architecture. Sits at the bold-and-fortified end of the grid, parallel to bastioned and armored.

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.

#0589ed
Original
#5590f1
Protanopia
#2a7eeb
Deuteranopia
#00a1af
Tritanopia
#747474
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).
AA Largeon White
3.62:1
The quick brown foxSample body text at normal size. The wcag minimum for body contrast is 4.5:1 (AA) or 7:1 (AAA).
AAon Black
5.81:1

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
##0589ED
Display P3
Display P3
color(display-p3 0.2366 0.5290 0.9009)
P3 has subtle headroomOKLCH chroma 0.178

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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