#0F282FBlack Box (#0F282F) is a very dark, muted sky blue with an OKLCH hue of 219°, lightness 0.26 and chroma 0.033. It sits on the cool side of the color wheel. In practice it behaves as a grounding tone — suited to text, outlines, and shadowed surfaces.
| HEX | #0F282F |
|---|---|
| RGB | rgb(15, 40, 47) |
| HSL | hsl(193, 52%, 12%) |
| HSV | hsv(193, 68%, 18%) |
| CMYK | cmyk(68%, 15%, 0%, 82%) |
| CIE Lab | lab(14.5 -7.1 -7.5) |
| OKLCH | oklch(0.260 0.033 219) |
Under warm 2700K interior light Black Box shifts subtly: leans toward blue-green; in north-facing or shaded light it shifts subtly: leans toward blue. Overall drift across common illuminants is small (max ΔE ≈ 0.8), so it is a lighting-stable choice.
#14272b — ΔE 0.8, shifts subtly: leans toward blue-green#12282e — ΔE 0.4, is virtually unchanged#0f282f — ΔE 0.0, is virtually unchanged#0f2830 — ΔE 0.2, shifts subtly: leans toward blueTest Black Box in the color lighting simulator — sweep it through daylight, warm 2700K light, 4000K LED, and shade alongside the rest of your palette.
Against white it measures 15.39:1 and against black 1.36:1, so white text is the stronger pairing. That pairing passes WCAG AA for body text. Avoid black text on this color entirely.
One color explored: close hues with real lightness and chroma structure, so the palette is the anchor through value rather than a set of colors.
#96a6ab · #6f8187 · #495e64 · #263d44 · #0f282f · #000408
The anchor's neighbours on the wheel — everything shares an undertone, so the chord carries color without anything having to be muted to get along.
#637d5c · #466e54 · #275e4d · #004e48 · #003b3f · #0f282f
The mid-gap pairing — sage and mustard, terracotta and olive. A foil rotated 40–65° toward warm or cool: too far to be kin, too near to argue, carried by temperature and a deliberate value offset.
#a7b0cc · #679cab · #6472a1 · #286170 · #363c51 · #0f282f
One deliberately opposed voice — a single restrained counterpoint across the wheel, or temperature against temperature where the anchor is too muted to carry a loud opposite.
#afc6cd · #c08775 · #46636c · #334348 · #0f282f · #000e14
The anchor as the only color in the room. True neutrals or complement-warmed near-neutrals let it stay dominant.
#f9f0ed · #a6b3b6 · #77716f · #303d41 · #0f282f · #140e0c
This color as a ground rather than a subject — its own restraint held across a narrow value band, carrying one saturated voice from the opposite temperature.
#e9f4f7 · #c0cdd1 · #93a1a6 · #0f282f · #00090f · #ef6739
The same quiet ground carrying one bright gold voice — the high-energy pairing a cool or muted anchor cannot reach through its own temperature.
#e9f4f7 · #c0cdd1 · #93a1a6 · #0f282f · #00090f · #ecbd4d
The opposite hue on the perceptual wheel, tempered to field strength — warm/cool tension without vibration.
#ffede8 · #d3a495 · #996352 · #572e21 · #0f282f · #001319
The complement's two neighbours instead of the complement itself — strong contrast with a lower clash risk.
#ffede8 · #d3a1a8 · #906a40 · #562c34 · #0f282f · #1a0c00
Three hues spaced evenly around the wheel; the anchor leads and the other two are held at supporting strength.
#fdecf7 · #caa2bd · #7e733d · #433b0d · #0f282f · #1a0815
Two complementary pairs offset by 90° — the richest chord, kept usable by a strict lightness hierarchy.
#f6eefe · #bba6ce · #996352 · #30411b · #0f282f · #1d0904
#30464D · #53666C · #77888D · #9DACB0 · #C5D1D4
#0C2229 · #091D23 · #06181D · #041317 · #030E11
#15272D · #1A262A · #1E2628
As a deep tone it works for grounding elements — text, outlines, and shadowed surfaces — rather than open fields. In palettes it pairs most predictably with its tonal ramp and analogous neighbors; reserve the complementary hue for small, deliberate contrast.