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Confident Rocky

#3759db
Notes

Confident Rocky (#3759DB) 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 (228°, 69%, 54%) 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 amber. For something softer, pull in its analogous neighbors on either side of the wheel.

HEX
#3759db
RGB
rgb(55, 89, 219)
HSL
hsl(228, 69%, 54%)
HWB
hwb(228 22% 14%)
OKLCH
oklch(52.0% 0.202 267.5)
P3
color(display-p3 0.2457 0.3455 0.8283)
HSV
hsv(228, 75%, 86%)
LAB
lab(42.87% 33.02 -69.94)
LCH
lch(42.87% 77.35 295.27)
CMYK
cmyk(75%, 59%, 0%, 14%)

Etymology

Confident
adjective

A late-Latin participle, confidens, trusting — borrowed into English in the sixteenth century. As a color modifier, confident implies saturation combined with poise: a confident red doesn't try too hard, just sits at the level of its hue without overreaching. Sits in the bold-bucket center near bold and resolute.

Rocky
noun

The North American mountain range — and the saturated deep blue of Rocky Mountain alpine lakes (Bear Lake, Sapphire Lake, Lake Louise) at high altitude. Rocky refers to Sapphire Lake in Montana's Glacier National Park: a saturated, slightly cool deep blue with the optical clarity of glacier-fed alpine lake.

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.

#3759db
Original
#006ddf
Protanopia
#005ed8
Deuteranopia
#007a91
Tritanopia
#5b5b5b
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
5.81:1
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
3.61:1

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
##3759DB
Display P3
Display P3
color(display-p3 0.2457 0.3455 0.8283)
P3 has visible headroomOKLCH chroma 0.202

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.

Related Colors

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