#010203Black Hole (#010203) is a near-black neutral with an OKLCH hue of 241°, lightness 0.08 and chroma 0.008. In practice it behaves as a grounding tone — suited to text, outlines, and shadowed surfaces.
| HEX | #010203 |
|---|---|
| RGB | rgb(1, 2, 3) |
| HSL | hsl(210, 50%, 1%) |
| HSV | hsv(210, 67%, 1%) |
| CMYK | cmyk(67%, 33%, 0%, 99%) |
| CIE Lab | lab(0.5 -0.1 -0.5) |
| OKLCH | oklch(0.082 0.008 241) |
Under warm 2700K interior light Black Hole is virtually unchanged; in north-facing or shaded light it is virtually unchanged. Overall drift across common illuminants is small (max ΔE ≈ 0), so it is a lighting-stable choice.
#010203 — ΔE 0.0, is virtually unchanged#010203 — ΔE 0.0, is virtually unchanged#010203 — ΔE 0.0, is virtually unchanged#010203 — ΔE 0.0, is virtually unchangedTest Black Hole 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 20.77:1 and against black 1.01:1, 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.
#999c9d · #747779 · #505356 · #303335 · #121518 · #010203
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.
#234d39 · #003d33 · #002b2b · #001b1f · #000c13 · #010203
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.
#9995b1 · #5a809c · #605685 · #204762 · #2a263a · #010203
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.
#d5a781 · #5c6c78 · #384e5e · #1a3141 · #0b161d · #010203
The anchor as the only color in the room. True neutrals or complement-warmed near-neutrals let it stay dominant.
#f7f0eb · #aab3bb · #7a7571 · #374148 · #140f0b · #010203
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.
#f0f2f4 · #ccced0 · #35383b · #15181a · #010203 · #f29a46
The opposite hue on the perceptual wheel, tempered to field strength — warm/cool tension without vibration.
#feefe3 · #cfaa8c · #976c47 · #583719 · #01121f · #010203
The complement's two neighbours instead of the complement itself — strong contrast with a lower clash risk.
#feefe3 · #d6a49b · #877540 · #5d322b · #160f00 · #010203
Three hues spaced evenly around the wheel; the anchor leads and the other two are held at supporting strength.
#ffecf1 · #d3a3b0 · #707d4a · #3b451b · #1d080f · #010203
Two complementary pairs offset by 90° — the richest chord, kept usable by a strict lightness hierarchy.
#fbedf9 · #c9a5c4 · #976c47 · #24492e · #1b0b01 · #010203
#2b2c2d · #565657 · #808181 · #aaabab · #d5d5d5
#010203 · #010102 · #010102 · #000101 · #000001
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.