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Reliable Hollow Teal

#5a88a8
Notes

Reliable Hollow Teal (#5A88A8) is a true azure 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 (205°, 31%, 51%) 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
#5a88a8
RGB
rgb(90, 136, 168)
HSL
hsl(205, 31%, 51%)
HWB
hwb(205 35% 34%)
OKLCH
oklch(60.6% 0.070 239.8)
P3
color(display-p3 0.3927 0.5285 0.6469)
HSV
hsv(205, 46%, 66%)
LAB
lab(54.67% -6.77 -21.81)
LCH
lch(54.67% 22.84 252.75)
CMYK
cmyk(46%, 19%, 0%, 34%)

Etymology

Reliable
adjective

Latin re-ligāre, to bind back — adjectival suffix -able. As a color modifier, reliable implies a clear-and-trustworthy-and-consistent quality where the hue carries the visual register of dependable-and-consistent design-element. Sits at the crisp-and-honest end of the grid, parallel to dependable and trustworthy in usage.

Hollow
modifier

Old English holh, hollow-place. As a color modifier, hollow implies a scooped-and-empty-and-resonant quality, the visual register of bell-and-gourd-and-tree-hollow hand-scooped-and-empty-and-resonant bell-and-gourd-and-tree-hollow hollowed-and-scooped-and-empty-and-resonant surfaces under bell-and-gourd-and-tree-hollow campanile-and-harvest-and-old-oak resonant-and-empty-light. Sits at the modifier-and-mood end of the grid, parallel to void and blank in usage.

Teal
noun

Anas crecca, the small dabbling duck whose male in breeding plumage sports a chestnut head crossed by a glossy green-blue stripe. The color refers to that stripe — the iridescent panel just behind the eye: a saturated, slightly muted blue-green with the optical depth of structural color rather than pigment. Cooler than cypress, warmer than cerulean, with the ornithological specificity of a color named for one feather of one bird.

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.

#5a88a8
Original
#7a87aa
Protanopia
#6f7fa7
Deuteranopia
#389093
Tritanopia
#818181
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).
AA Largeon White
3.80:1
The quick brown foxSample body text at normal size. The wcag minimum for body contrast is 4.5:1 (AA) or 7:1 (AAA).
AAon Black
5.52:1

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
##5A88A8
Display P3
Display P3
color(display-p3 0.3927 0.5285 0.6469)
Inside sRGBOKLCH chroma 0.070

This color sits well within the sRGB cube. P3 and sRGB share the gray axis and most desaturated tones, so a P3 display renders this identically to an sRGB display.

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