#3A4A63Silent Sea (#3A4A63) is a dark, muted blue with an OKLCH hue of 259°, lightness 0.41 and chroma 0.047. 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 | #3A4A63 |
|---|---|
| RGB | rgb(58, 74, 99) |
| HSL | hsl(217, 26%, 31%) |
| HSV | hsv(217, 41%, 39%) |
| CMYK | cmyk(41%, 25%, 0%, 61%) |
| CIE Lab | lab(31.1 0.8 -16.6) |
| OKLCH | oklch(0.406 0.047 259) |
Under warm 2700K interior light Silent Sea shifts subtly: leans toward purple; in north-facing or shaded light it is virtually unchanged. Overall drift across common illuminants is small (max ΔE ≈ 1.3), so it is a lighting-stable choice.
#3f485c — ΔE 1.3, shifts subtly: leans toward purple#3d4b61 — ΔE 0.7, is virtually unchanged#3a4a63 — ΔE 0.0, is virtually unchanged#3a4a64 — ΔE 0.2, is virtually unchangedTest Silent Sea 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 8.98:1 and against black 2.34:1, 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.
#8d9bb1 · #67768d · #3a4a63 · #243248 · #081426 · #000008
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.
#447285 · #375e7c · #3a4a63 · #2f365d · #2b2447 · #231331
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.
#a999b4 · #9175a3 · #6c5f75 · #3a4a63 · #1b2f4f · #051632
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.
#debf8d · #7b899f · #606875 · #3a4a63 · #202d42 · #0c131f
The anchor as the only color in the room. True neutrals or complement-warmed near-neutrals let it stay dominant.
#f6f1ea · #a2a8b1 · #65625d · #3a4a63 · #2c323b · #020100
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.
#ebf2fe · #c1cad8 · #3a4a63 · #1a2537 · #000414 · #f4b94d
The opposite hue on the perceptual wheel, tempered to field strength — warm/cool tension without vibration.
#faf0e1 · #bca37d · #795d2d · #3a4a63 · #432d02 · #000007
The complement's two neighbours instead of the complement itself — strong contrast with a lower clash risk.
#faf0e1 · #c79d86 · #656630 · #3a4a63 · #4b2712 · #020200
Three hues spaced evenly around the wheel; the anchor leads and the other two are held at supporting strength.
#ffedec · #ca9898 · #4c6d43 · #3a4a63 · #203919 · #0a0001
Two complementary pairs offset by 90° — the richest chord, kept usable by a strict lightness hierarchy.
#feecf4 · #c598ad · #795d2d · #3a4a63 · #003c2c · #100600
#55647B · #727F94 · #909CAE · #AFB9C8 · #CFD7E3
#2F3E54 · #253246 · #1B2638 · #121B2A · #09111E
#3D4A5E · #414A58 · #444A53
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.