#4B57DBWarm Blue (#4B57DB) is a mid-tone, saturated blue with an OKLCH hue of 273°, lightness 0.53 and chroma 0.199. 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 | #4B57DB |
|---|---|
| RGB | rgb(75, 87, 219) |
| HSL | hsl(235, 67%, 58%) |
| HSV | hsv(235, 66%, 86%) |
| CMYK | cmyk(66%, 60%, 0%, 14%) |
| CIE Lab | lab(43.4 36.8 -69) |
| OKLCH | oklch(0.527 0.199 273) |
Under warm 2700K interior light Warm Blue shifts subtly: leans toward purple, loses intensity; in north-facing or shaded light it is virtually unchanged. Overall drift across common illuminants is small (max ΔE ≈ 2.3), so it is a lighting-stable choice.
#5357ce — ΔE 2.3, shifts subtly: leans toward purple, loses intensity#5059d7 — ΔE 1.1, shifts only faintly, with no single dominant change#4b57db — ΔE 0.0, is virtually unchanged#4a57de — ΔE 0.5, is virtually unchangedTest Warm 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 5.7:1 and against black 3.69:1, 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.
#abbcff · #798eff · #4b57db · #363cb6 · #1e1386 · #0a0048
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.
#0097e1 · #2b79e3 · #4b57db · #5d3cb8 · #602390 · #5b0968
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.
#e373e9 · #a773a9 · #4b57db · #363ea9 · #212084 · #330037
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.
#e9c000 · #7f89b0 · #4b57db · #3a4587 · #212861 · #0c1034
The anchor as the only color in the room. True neutrals or complement-warmed near-neutrals let it stay dominant.
#f8f2dd · #7d849e · #4b57db · #565244 · #1a1f38 · #070400
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.
#f5f2e6 · #cfcbbe · #a5a192 · #322d1a · #110b00 · #4b57db
The opposite hue on the perceptual wheel, tempered to field strength — warm/cool tension without vibration.
#fff2c5 · #9f8200 · #4b57db · #625000 · #2a2000 · #010011
The complement's two neighbours instead of the complement itself — strong contrast with a lower clash risk.
#fff2c5 · #bf6f00 · #4b57db · #465b00 · #341a00 · #010400
Three hues spaced evenly around the wheel; the anchor leads and the other two are held at supporting strength.
#ffede9 · #d35a40 · #4b57db · #006332 · #002a11 · #080000
Two complementary pairs offset by 90° — the richest chord, kept usable by a strict lightness hierarchy.
#ffecf0 · #d0547b · #4b57db · #625000 · #002823 · #0a0500
#6173E7 · #7A8DF3 · #94A7FE · #B2C1FF · #D2DBFF
#3C45BC · #2E349F · #212382 · #161166 · #0B004B
#505FC4 · #5664AD · #5D6895
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.