Cooling Graphite
Cooling Graphite (#3C4E57) is a deep azure with an earthy character. It leans grounded and natural, the kind of color that plays well with wood, clay, linen, and warm neutrals. Its HSL profile (200°, 18%, 29%) places it in the muted 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 orange. For something softer, pull in its analogous neighbors on either side of the wheel.
Etymology
Old English cōl, cool — present-participle of cool. As a color modifier, cooling implies a hushed-and-tone-reducing-and-cooling quality where the hue carries the visual register of evening-dusk gradually-cooling atmospheric-light color-temperature shift. Sits at the hushed-and-soft end of the grid, parallel to softening and quieting in usage.
A crystalline allotrope of carbon — the same element as diamond but with a layered structure that gives it a metallic luster, lubricity, and the property of leaving black traces on paper. Mined principally in Sri Lanka and Mozambique. The color refers to a freshly sharpened pencil tip: a deep, slightly muted gray-black with the slight metallic shine of layered crystalline carbon. Warmer than charcoal, lighter than ink.
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.