#4CA8E0High Blue (#4CA8E0) is a light, soft sky blue with an OKLCH hue of 239°, lightness 0.7 and chroma 0.12. 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 | #4CA8E0 |
|---|---|
| RGB | rgb(76, 168, 224) |
| HSL | hsl(203, 70%, 59%) |
| HSV | hsv(203, 66%, 88%) |
| CMYK | cmyk(66%, 25%, 0%, 12%) |
| CIE Lab | lab(65.7 -10 -36.3) |
| OKLCH | oklch(0.700 0.120 239) |
Under warm 2700K interior light High Blue shifts subtly: loses intensity; in north-facing or shaded light it is virtually unchanged. Overall drift across common illuminants is small (max ΔE ≈ 2.3), so it is a lighting-stable choice.
#5ea5d2 — ΔE 2.3, shifts subtly: loses intensity#57a9dc — ΔE 1.1, shifts only faintly, with no single dominant change#4ca8e0 — ΔE 0.0, is virtually unchanged#4aa9e3 — ΔE 0.5, is virtually unchangedTest High 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 2.63:1 and against black 7.98:1, 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.
#e5f4ff · #8fd2ff · #4ca8e0 · #2d85b7 · #00608c · #003c5b
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.
#74d5e2 · #59c0e2 · #4ca8e0 · #5b8ece · #6376b7 · #65609c
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.
#bdb8e2 · #4ca8e0 · #3d88b6 · #6455a2 · #004d72 · #2e274c
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.
#cae9ff · #acc5d6 · #4ca8e0 · #b16929 · #3c627c · #2a4353
The anchor as the only color in the room. True neutrals or complement-warmed near-neutrals let it stay dominant.
#fbefe7 · #4ca8e0 · #768590 · #554d48 · #13222c · #030100
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.
#faf0e8 · #d6c9c0 · #ad9f95 · #3c2c20 · #1a0b01 · #4ca8e0
The opposite hue on the perceptual wheel, tempered to field strength — warm/cool tension without vibration.
#d5dbb5 · #4ca8e0 · #7f85ba · #b14f1f · #482c33 · #07092f
The complement's two neighbours instead of the complement itself — strong contrast with a lower clash risk.
#ffeee2 · #4ca8e0 · #b56c62 · #624b00 · #450000 · #0d0600
Three hues spaced evenly around the wheel; the anchor leads and the other two are held at supporting strength.
#ffecf1 · #4ca8e0 · #b16a82 · #4a5600 · #1d2300 · #0e0003
Two complementary pairs offset by 90° — the richest chord, kept usable by a strict lightness hierarchy.
#ffeafd · #4ca8e0 · #a36ea0 · #773e00 · #00290a · #180600
#68B6E7 · #82C3EF · #9AD1F6 · #B2DEFC · #CEEBFF
#358ABC · #1D6D99 · #005178 · #003753 · #001E31
#63A7D2 · #76A5C5 · #86A3B7
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.