#88DDDDCold Blue (#88DDDD) is a very light, soft blue-green with an OKLCH hue of 196°, lightness 0.84 and chroma 0.083. 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 | #88DDDD |
|---|---|
| RGB | rgb(136, 221, 221) |
| HSL | hsl(180, 56%, 70%) |
| HSV | hsv(180, 38%, 87%) |
| CMYK | cmyk(38%, 0%, 0%, 13%) |
| CIE Lab | lab(83 -25.7 -8.1) |
| OKLCH | oklch(0.844 0.083 196) |
Under warm 2700K interior light Cold Blue shifts subtly: leans toward green, loses intensity; in north-facing or shaded light it shifts subtly: leans toward sky blue. Overall drift across common illuminants is small (max ΔE ≈ 2.3), so it is a lighting-stable choice.
#98d8cf — ΔE 2.3, shifts subtly: leans toward green, loses intensity#92ded9 — ΔE 1.2, shifts subtly: leans toward green#88dddd — ΔE 0.0, is virtually unchanged#87dee0 — ΔE 0.4, shifts subtly: leans toward sky blueTest Cold Blue 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 1.56:1 and against black 13.43:1, 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.
#c4ffff · #88dddd · #64b1b1 · #448a8a · #236465 · #004142
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.
#e2f6ff · #a5ecfb · #88dddd · #80c9ba · #7cb49a · #799f7d
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.
#88dddd · #98afc5 · #569b9b · #47749e · #1a5f5f · #253b4f
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.
#def5f5 · #88dddd · #b7767a · #47706f · #2c5050 · #1a3131
The anchor as the only color in the room. True neutrals or complement-warmed near-neutrals let it stay dominant.
#88dddd · #b6acad · #707e7d · #4e4848 · #122121 · #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.
#fbeeef · #d4c5c6 · #a99999 · #322020 · #0e0203 · #88dddd
The opposite hue on the perceptual wheel, tempered to field strength — warm/cool tension without vibration.
#e4ecc6 · #88dddd · #8bc38d · #d65696 · #4c3655 · #1c061e
The complement's two neighbours instead of the complement itself — strong contrast with a lower clash risk.
#88dddd · #bea9aa · #976b83 · #6d3a20 · #330d25 · #110200
Three hues spaced evenly around the wheel; the anchor leads and the other two are held at supporting strength.
#88dddd · #b5abba · #8a6f95 · #634206 · #2b1900 · #030005
Two complementary pairs offset by 90° — the richest chord, kept usable by a strict lightness hierarchy.
#88dddd · #adadbf · #7675a0 · #6f353a · #211f00 · #0b0001
#99E2E2 · #A9E7E7 · #B8ECEB · #C7F1F0 · #D6F6F5
#68B5B5 · #4A8F8F · #2C6B6B · #0C4949 · #002828
#99DAD9 · #A8D6D6 · #B6D2D2
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.