Grim Bottomless
Grim Bottomless (#081B1D) is a deep 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 (186°, 57%, 7%) places it in the balanced band at a dark lightness. It works well as a headline, icon, or deep background in an otherwise light layout, pairing cleanly with cream, bone, and warm neutrals. 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.
Etymology
Old English grimm, fierce / fierce-faced — sharing root with German grimm and Old Norse grimmr. As a color modifier, grim implies a deep-and-cool-and-comfortless-formal quality, the dark cool-gray of Norwegian-fjord mid-winter atmospheric-overcast light. Sits at the deep-and-cool end of the grid, parallel to bleak and stern in atmospheric register.
A descriptor for water deep enough that the bottom isn't visible from above — particularly cenote sinkholes, deep ocean trenches, and Caribbean blue holes. Bottomless color refers to the Great Blue Hole of Belize seen from above: a saturated, slightly cool very deep blue with the optical depth of unfathomably deep 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 exploreHarmonies
Accessibility
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.
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.
Wide gamut
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.
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.