#49747FHydro (#49747F) is a mid-tone, muted sky blue with an OKLCH hue of 216°, lightness 0.53 and chroma 0.051. It sits on the cool side of the color wheel. In practice it behaves as a mid-weight working color for secondary surfaces and editorial blocks.
| HEX | #49747F |
|---|---|
| RGB | rgb(73, 116, 127) |
| HSL | hsl(192, 27%, 39%) |
| HSV | hsv(192, 43%, 50%) |
| CMYK | cmyk(43%, 9%, 0%, 50%) |
| CIE Lab | lab(46.2 -11.8 -10.7) |
| OKLCH | oklch(0.532 0.051 216) |
Under warm 2700K interior light Hydro shifts subtly: leans toward blue-green; in north-facing or shaded light it is virtually unchanged. Overall drift across common illuminants is small (max ΔE ≈ 1.4), so it is a lighting-stable choice.
#517177 — ΔE 1.4, shifts subtly: leans toward blue-green#4e757c — ΔE 0.8, shifts subtly: leans toward blue-green#49747f — ΔE 0.0, is virtually unchanged#487581 — ΔE 0.4, is virtually unchangedTest Hydro 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 5.14:1 and against black 4.09:1, so white 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.
#a7c8d1 · #7ca2ac · #49747f · #315963 · #123740 · #00181f
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.
#669c93 · #498a8d · #49747f · #2d627c · #2d4e6c · #2b3a5a
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.
#94a7d8 · #8089a1 · #49747f · #1d5966 · #003d49 · #151c31
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.
#b7d8e1 · #bc8273 · #49747f · #405155 · #14363e · #07191e
The anchor as the only color in the room. True neutrals or complement-warmed near-neutrals let it stay dominant.
#f9efed · #7d898c · #49747f · #575150 · #182427 · #030101
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.
#e4f5fa · #baced3 · #49747f · #0a2b32 · #00080c · #ec5f39
The same quiet ground carrying one bright gold voice — the high-energy pairing a cool or muted anchor cannot reach through its own temperature.
#e4f5fa · #baced3 · #49747f · #0a2b32 · #00080c · #ecbd4d
The opposite hue on the perceptual wheel, tempered to field strength — warm/cool tension without vibration.
#d8dbb6 · #94c9bc · #cd9a60 · #49747f · #68413b · #05120f
The complement's two neighbours instead of the complement itself — strong contrast with a lower clash risk.
#ffede9 · #a77881 · #49747f · #6f4a22 · #3a121d · #120500
Three hues spaced evenly around the wheel; the anchor leads and the other two are held at supporting strength.
#fcecf8 · #9e7995 · #49747f · #60531c · #2a2100 · #030003
Two complementary pairs offset by 90° — the richest chord, kept usable by a strict lightness hierarchy.
#f5eefe · #8f7ea4 · #49747f · #774335 · #1a2700 · #050000
#638993 · #7D9EA7 · #98B4BB · #B3CAD0 · #CFE1E6
#39606A · #2A4D56 · #1C3B42 · #0D2930 · #02191E
#52727B · #5A7177 · #616F73
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.