#0066FFBlue Ribbon (#0066FF) is a mid-tone, vivid blue with an OKLCH hue of 261°, lightness 0.56 and chroma 0.241. It sits on the cool side of the color wheel. In practice it behaves as an accent color: strong in focal moments, dominant over large fields.
| HEX | #0066FF |
|---|---|
| RGB | rgb(0, 102, 255) |
| HSL | hsl(216, 100%, 50%) |
| HSV | hsv(216, 100%, 100%) |
| CMYK | cmyk(100%, 60%, 0%, 0%) |
| CIE Lab | lab(47.9 35.2 -82) |
| OKLCH | oklch(0.563 0.241 261) |
Under warm 2700K interior light Blue Ribbon shifts noticeably: leans toward purple, loses intensity; in north-facing or shaded light it is virtually unchanged. Overall drift across common illuminants is small (max ΔE ≈ 2.6), so it is a lighting-stable choice.
#2966f0 — ΔE 2.6, shifts noticeably: leans toward purple, loses intensity#1b68fb — ΔE 1.1, shifts only faintly, with no single dominant change#0066ff — ΔE 0.0, is virtually unchanged#0066ff — ΔE 0.0, is virtually unchangedTest Blue Ribbon 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 4.83:1 and against black 4.34:1, 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.
#afcdff · #6ea3ff · #0066ff · #004fca · #003187 · #00154a
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.
#00a8db · #008ede · #0066ff · #4d46df · #5e29b7 · #60098c
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.
#d88eff · #ad7cc8 · #0066ff · #004dc6 · #00358f · #3a0051
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.
#fcb600 · #7d97c3 · #0066ff · #28539f · #0f3476 · #041b44
The anchor as the only color in the room. True neutrals or complement-warmed near-neutrals let it stay dominant.
#fef0d9 · #8091ae · #0066ff · #645a4b · #152542 · #110700
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.
#f7f1e6 · #d2cbbf · #aaa294 · #392f1e · #180e00 · #0066ff
The opposite hue on the perceptual wheel, tempered to field strength — warm/cool tension without vibration.
#c9e1c1 · #c5c136 · #0066ff · #5356a0 · #2d3d2b · #041017
The complement's two neighbours instead of the complement itself — strong contrast with a lower clash risk.
#fff0d6 · #df6a00 · #0066ff · #5f6000 · #401800 · #040300
Three hues spaced evenly around the wheel; the anchor leads and the other two are held at supporting strength.
#ffedec · #ef515b · #0066ff · #176f00 · #032f00 · #180001
Two complementary pairs offset by 90° — the richest chord, kept usable by a strict lightness hierarchy.
#ffecf4 · #e2539f · #0066ff · #785500 · #002e22 · #110700
#3C83FF · #639CFF · #87B3FF · #ABCAFF · #CDE0FF
#0053D5 · #0042AD · #003186 · #002062 · #001041
#2C6EE2 · #4473C6 · #5876A9
Its chroma is high enough to carry accents, calls to action, and focal moments; large fields of it will dominate a composition. In palettes it pairs most predictably with its tonal ramp and analogous neighbors; reserve the complementary hue for small, deliberate contrast.