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Open Bergen

#42b3dc
Notes

Open Bergen (#42B3DC) is a true cyan with a vibrant character. It holds its own as a focal accent, carrying visual weight without tipping into neon territory. Its HSL profile (196°, 69%, 56%) 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 orange. For something softer, pull in its analogous neighbors on either side of the wheel.

HEX
#42b3dc
RGB
rgb(66, 179, 220)
HSL
hsl(196, 69%, 56%)
HWB
hwb(196 26% 14%)
OKLCH
oklch(72.0% 0.116 226.2)
P3
color(display-p3 0.3883 0.6927 0.8463)
HSV
hsv(196, 70%, 86%)
LAB
lab(68.43% -18.73 -29.86)
LCH
lch(68.43% 35.25 237.91)
CMYK
cmyk(70%, 19%, 0%, 14%)

Etymology

Open
adjective

Old English open, unobstructed — used as a color modifier since the eighteenth century for hues that read as airy or uncrowded. Open blue, open green: moderate saturation combined with optical spaciousness, the slight visual breath of a hue that doesn't crowd the surface it covers. Sits at the crisp-bucket center alongside clear.

Bergen
noun

The Norwegian fjord-town on the Bryggen harbor — and the saturated deep blue of Bergen's Vågen harbor and the surrounding Hardangerfjord water. Bergen color refers to Bergen harbor at clear-day midday: a saturated, slightly cool deep blue with the optical depth of glacier-fed coastal water.

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.

#42b3dc
Original
#9db0de
Protanopia
#88a0dc
Deuteranopia
#00bfc0
Tritanopia
#9e9e9e
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).
Failon White
2.41:1
The quick brown foxSample body text at normal size. The wcag minimum for body contrast is 4.5:1 (AA) or 7:1 (AAA).
AAAon Black
8.71:1

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
##42B3DC
Display P3
Display P3
color(display-p3 0.3883 0.6927 0.8463)
P3 has subtle headroomOKLCH chroma 0.116

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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