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Sonorous Jupiter Royal

#374eea
Notes

Sonorous Jupiter Royal (#374EEA) is a true blue with a vibrant character. It holds its own as a focal accent, carrying visual weight without tipping into neon territory. Its HSL profile (232°, 81%, 57%) 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 amber. For something softer, pull in its analogous neighbors on either side of the wheel.

HEX
#374eea
RGB
rgb(55, 78, 234)
HSL
hsl(232, 81%, 57%)
HWB
hwb(232 22% 8%)
OKLCH
oklch(51.4% 0.234 269.3)
P3
color(display-p3 0.2347 0.3034 0.8836)
HSV
hsv(232, 76%, 92%)
LAB
lab(41.53% 45.12 -80.65)
LCH
lch(41.53% 92.42 299.22)
CMYK
cmyk(76%, 67%, 0%, 8%)

Etymology

Sonorous
adjective

Latin sonōrus, resounding — derived from sonus (sound). As a color modifier, sonorous implies a saturated-and-richly-vibrating quality where the hue carries the deep-resonance visual register of a cathedral-organ-pipe low-note. Sits at the bold-and-resonant end of the grid, parallel to resonant and deep in usage.

Jupiter
modifier

Latin Iuppiter, Roman-king-of-gods-and-fifth-planet. As a color modifier, jupiter implies a Roman-king-of-gods-and-fifth-planet-and-gas-giant quality, the visual register of Roman-Jupiter-Optimus-Maximus-and-Galileo-moons hand-Roman-king-of-gods-and-fifth-planet-and-gas-giant Roman-Jupiter-Optimus-Maximus-and-Galileo-moons-and-Great-Red-Spot jupiter-and-Roman-king-of-gods surfaces under Roman-Jupiter-Optimus-Maximus-and-Galileo-moons-and-Great-Red-Spot Capitoline-Hill-and-Galilean-moon-discovery king-of-planets-light. Sits at the modifier-and-zodiac end of the grid, parallel to venus and saturn in usage.

Royal
noun

The blue of European royal court dress and regalia from the late seventeenth century forward — the color of British peers' robes, French royal sashes, the lining of the crown-jewel cases. The color refers to a saturated, slightly violet-shifted blue with the matte finish of velvet or melton wool dyed to maximum intensity: deeper than cornflower, warmer than ultramarine, with the heraldic weight of a color reserved for monarchs and the official Crown.

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.

#374eea
Original
#006bef
Protanopia
#0059e7
Deuteranopia
#007896
Tritanopia
#545454
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).
AAon White
6.10:1
The quick brown foxSample body text at normal size. The wcag minimum for body contrast is 4.5:1 (AA) or 7:1 (AAA).
AA Largeon Black
3.44:1

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
##374EEA
Display P3
Display P3
color(display-p3 0.2347 0.3034 0.8836)
P3 has visible headroomOKLCH chroma 0.234

This color is chromatic enough that authoring it as P3 native (instead of clamping to sRGB) gives a perceptibly more saturated render on wide-gamut displays — modern Macs, iPhones, iPads, and most recent OLED laptops.

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