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Steadfast Vega Sapphire

#3639a4
Notes

Steadfast Vega Sapphire (#3639A4) 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 (238°, 50%, 43%) places it in the balanced 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 yellow. For something softer, pull in its analogous neighbors on either side of the wheel.

HEX
#3639a4
RGB
rgb(54, 57, 164)
HSL
hsl(238, 50%, 43%)
HWB
hwb(238 21% 36%)
OKLCH
oklch(41.4% 0.168 275.0)
HSV
hsv(238, 67%, 64%)
LAB
lab(30.38% 33.63 -58.13)
LCH
lch(30.38% 67.16 300.05)
CMYK
cmyk(67%, 65%, 0%, 36%)

Etymology

Steadfast
adjective

Old English stede-fæst, fixed in place — sharing root with German stetig. As a color modifier, steadfast implies a saturated-and-unwavering quality where the hue maintains its visual character without modulation. Sits at the bold-and-firm end of the grid, parallel to unwavering and firm in usage.

Vega
modifier

Arabic al-nasr-al-wāqi', the-falling-eagle. As a color modifier, vega implies a brilliant-blue-white-and-summer-zenith quality, the visual register of Lyra-constellation-and-northern-summer-Vega hand-brilliant-blue-white-and-summer-zenith Lyra-constellation-and-northern-summer-and-Bortle-1-sky vega-and-brilliant-blue-white-and-summer-zenith surfaces under Lyra-constellation-and-northern-summer-and-Bortle-1-sky July-and-August-northern-zenith deep-sky-light. Sits at the modifier-and-cosmic end of the grid, parallel to deneb and altair in usage.

Sapphire
noun

An iron-and-titanium-bearing corundum — the same mineral as ruby, hardness 9 on the Mohs scale, mined for two millennia from Sri Lanka, Burma, Madagascar, and the Cashmere mines of British India. The color refers to a fine Kashmir-cut sapphire: a saturated, slightly violet-shifted deep blue with the gem's signature internal velvet — a quality of light scattering in the stone that faceted glass cannot replicate. Cooler than cobalt, deeper than azure.

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

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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.

#3639a4
Original
#004ca7
Protanopia
#0043a2
Deuteranopia
#005569
Tritanopia
#404040
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
9.22:1
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
2.28:1

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