#6B7F81Blue Blood (#6B7F81) is a grey neutral with an OKLCH hue of 204°, lightness 0.58 and chroma 0.024. In practice it behaves as a mid-weight working color for secondary surfaces and editorial blocks.
| HEX | #6B7F81 |
|---|---|
| RGB | rgb(107, 127, 129) |
| HSL | hsl(185, 9%, 46%) |
| HSV | hsv(185, 17%, 51%) |
| CMYK | cmyk(17%, 2%, 0%, 49%) |
| CIE Lab | lab(51.7 -6.8 -3.5) |
| OKLCH | oklch(0.581 0.024 204) |
Under warm 2700K interior light Blue Blood shifts only faintly, with no single dominant change; in north-facing or shaded light it shifts subtly: takes on a sky blue cast. Overall drift across common illuminants is small (max ΔE ≈ 1.5), so it is a lighting-stable choice.
#727c78 — ΔE 1.5, shifts only faintly, with no single dominant change#70807e — ΔE 0.9, is virtually unchanged#6b7f81 — ΔE 0.0, is virtually unchanged#6b8083 — ΔE 0.4, shifts subtly: takes on a sky blue castTest Blue Blood 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 4.22:1 and against black 4.98:1, so black text is the stronger pairing. That pairing passes WCAG AA for body text.
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.
#c5d5d7 · #9caeb0 · #6b7f81 · #526466 · #324243 · #152224
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.
#79ab9a · #5a9a94 · #6b7f81 · #357385 · #325e77 · #304a67
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.
#98bae8 · #8a9ab0 · #6b7f81 · #2a686e · #0d4c51 · #1b2a3d
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.
#cfe7ea · #a0c6ca · #8ca0a2 · #6b7f81 · #804a46 · #244346
The anchor as the only color in the room. True neutrals or complement-warmed near-neutrals let it stay dominant.
#f9efee · #8b989a · #6b7f81 · #655f5e · #1d2a2c · #020101
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.
#ebf4f4 · #c2cbcc · #6b7f81 · #192728 · #000607 · #e34f4f
The same quiet ground carrying one bright gold voice — the high-energy pairing a cool or muted anchor cannot reach through its own temperature.
#ebf4f4 · #c2cbcc · #6b7f81 · #192728 · #000607 · #eebc4d
The opposite hue on the perceptual wheel, tempered to field strength — warm/cool tension without vibration.
#ffedeb · #b88884 · #6b7f81 · #864f4c · #421918 · #000304
The complement's two neighbours instead of the complement itself — strong contrast with a lower clash risk.
#ffedeb · #b48798 · #6b7f81 · #825536 · #3f192a · #110300
Three hues spaced evenly around the wheel; the anchor leads and the other two are held at supporting strength.
#faedfb · #a889ab · #6b7f81 · #755d2a · #352500 · #030004
Two complementary pairs offset by 90° — the richest chord, kept usable by a strict lightness hierarchy.
#f2efff · #978fb8 · #6b7f81 · #864f4c · #282b00 · #050000
#809294 · #95A5A7 · #ACB9BA · #C2CDCE · #D9E2E2
#57696B · #445355 · #313F40 · #202B2D · #0F191A
Its moderate chroma lets it work in mid-size areas — upholstery, secondary UI surfaces, editorial blocks — without overwhelming neighbors. In palettes it pairs most predictably with its tonal ramp and analogous neighbors; reserve the complementary hue for small, deliberate contrast.