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Straightforward Frost

#55dad2
Notes

Straightforward Frost (#55DAD2) is a true cyan with a cool character. It leans cool, sitting on the blue, green, and violet side of the wheel. Quiet and dependable, a fit for product UI and data visualization. Its HSL profile (176°, 64%, 59%) 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 red. For something softer, pull in its analogous neighbors on either side of the wheel.

HEX
#55dad2
RGB
rgb(85, 218, 210)
HSL
hsl(176, 64%, 59%)
HWB
hwb(176 33% 15%)
OKLCH
oklch(81.4% 0.116 189.6)
P3
color(display-p3 0.4836 0.8439 0.8205)
HSV
hsv(176, 61%, 85%)
LAB
lab(80.02% -37.81 -6.87)
LCH
lch(80.02% 38.43 190.30)
CMYK
cmyk(61%, 0%, 4%, 15%)

Etymology

Straightforward
adjective

English compound straight + forward — sharing root with German geradeaus. As a color modifier, straightforward implies a clear-and-direct-and-unencumbered quality where the hue carries the visual register of clear-aim-and-uncomplicated character. Sits at the crisp-and-honest end of the grid, parallel to candid and direct in usage.

Frost
noun

The ice crystals that condense from atmospheric moisture onto cold surfaces — windowpanes, leaves, the windshield of a parked car at dawn. The color is barely a color: a very pale, slightly green-shifted blue with the optical brightness of micron-scale crystals scattering light. Lighter than glacier, warmer than ice, with the agricultural-calendar weight of a phenomenon that defines the growing season.

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.

#55dad2
Original
#cecfd2
Protanopia
#bac0d3
Deuteranopia
#00dfd7
Tritanopia
#bdbdbd
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
1.70:1
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
12.35:1

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
##55DAD2
Display P3
Display P3
color(display-p3 0.4836 0.8439 0.8205)
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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