#83AFBCOpen Seas (#83AFBC) is a light, muted sky blue with an OKLCH hue of 218°, lightness 0.73 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 | #83AFBC |
|---|---|
| RGB | rgb(131, 175, 188) |
| HSL | hsl(194, 30%, 63%) |
| HSV | hsv(194, 30%, 74%) |
| CMYK | cmyk(30%, 7%, 0%, 26%) |
| CIE Lab | lab(68.8 -11.6 -11.4) |
| OKLCH | oklch(0.727 0.051 218) |
Under warm 2700K interior light Open Seas shifts subtly: leans toward blue-green, loses intensity; in north-facing or shaded light it shifts subtly: leans toward blue. Overall drift across common illuminants is small (max ΔE ≈ 1.9), so it is a lighting-stable choice.
#8dabb0 — ΔE 1.9, shifts subtly: leans toward blue-green, loses intensity#8ab0b8 — ΔE 1.1, shifts subtly: leans toward blue-green#83afbc — ΔE 0.0, is virtually unchanged#82b0bf — ΔE 0.4, shifts subtly: leans toward blueTest Open Seas 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 2.38:1 and against black 8.82:1, so black text is the stronger pairing. That pairing passes WCAG AA for body text. Avoid white 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.
#ddf7ff · #a9d1dd · #83afbc · #5d848f · #3d5f69 · #1e3d46
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.
#a2dad2 · #85c7cc · #83afbc · #689cb9 · #6586a8 · #617093
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.
#83afbc · #7f88a0 · #3c7483 · #3f4c78 · #003c49 · #151b30
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.
#d1f4ff · #bacdd3 · #83afbc · #ad7564 · #4d6b74 · #374b50
The anchor as the only color in the room. True neutrals or complement-warmed near-neutrals let it stay dominant.
#f9f0ed · #83afbc · #828e91 · #585250 · #182428 · #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.
#e5f5fa · #bbced4 · #83afbc · #0d2d35 · #000a0f · #ef6539
The same quiet ground carrying one bright gold voice — the high-energy pairing a cool or muted anchor cannot reach through its own temperature.
#e5f5fa · #bbced4 · #83afbc · #0d2d35 · #000a0f · #ecbd4d
The opposite hue on the perceptual wheel, tempered to field strength — warm/cool tension without vibration.
#ced7b2 · #83afbc · #9f6e37 · #4f5a7d · #43292c · #04100f
The complement's two neighbours instead of the complement itself — strong contrast with a lower clash risk.
#ffede8 · #83afbc · #ac7c84 · #6f4b21 · #3b131c · #130600
Three hues spaced evenly around the wheel; the anchor leads and the other two are held at supporting strength.
#fdecf7 · #83afbc · #a47d98 · #5f541d · #292200 · #040002
Two complementary pairs offset by 90° — the richest chord, kept usable by a strict lightness hierarchy.
#f6eefe · #83afbc · #9582a8 · #774435 · #192701 · #050000
#94BBC6 · #A5C7D1 · #B7D3DB · #C8DFE6 · #DAEBF1
#68909B · #4E727C · #36555E · #1F3A41 · #092027
#8BADB7 · #93ACB3 · #9BAAAE
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.