Red Stop `#FF2222`

Red Stop (#FF2222) is a mid-tone, vivid red with an OKLCH hue of 28°, lightness 0.64 and chroma 0.247. It sits on the warm side of the color wheel. In practice it behaves as an accent color: strong in focal moments, dominant over large fields.

Color values

HEX	`#FF2222`
RGB	`rgb(255, 34, 34)`
HSL	`hsl(0, 100%, 57%)`
HSV	`hsv(0, 87%, 100%)`
CMYK	`cmyk(0%, 87%, 87%, 0%)`
CIE Lab	`lab(54.6 76.9 57.2)`
OKLCH	`oklch(0.638 0.247 28)`

How Red Stop behaves under real light

Under warm 2700K interior light Red Stop is virtually unchanged; in north-facing or shaded light it is virtually unchanged. Overall drift across common illuminants is small (max ΔE ≈ 0.7), so it is a lighting-stable choice.

Warm interior (2700K incandescent / warm LED): → #ff151b — ΔE 0.7, is virtually unchanged
Neutral LED (4000K task and retail lighting): → #ff1d1f — ΔE 0.3, is virtually unchanged
Daylight (6500K standard daylight (reference)): → #ff2222 — ΔE 0.0, is virtually unchanged
Blue-sky shade (cool daylight (~10000K proxy)): → #ff2323 — ΔE 0.1, is virtually unchanged

Test Red Stop in the color lighting simulator — sweep it through daylight, warm 2700K light, 4000K LED, and shade alongside the rest of your palette.

Contrast & accessibility

Against white it measures 3.82:1 and against black 5.5:1, so black text is the stronger pairing. That pairing passes WCAG AA for body text.

Colors that go with Red Stop

Tonal

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.

#ffdad5 · #ff9e91 · #ff2222 · #d4000d · #960006 · #5d0001

Analogous

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.

#ff910a · #ff6801 · #ff2222 · #df0654 · #bc036c · #960b78

Shifted

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.

#d3a144 · #ff2222 · #cc1617 · #6c4b00 · #6e0003 · #2c1b00

Contrast

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.

#00ddf4 · #ff2222 · #915a53 · #87241d · #600204 · #330000

Quiet Support

The anchor as the only color in the room. True neutrals or complement-warmed near-neutrals let it stay dominant.

#d8f9fe · #c59c96 · #ff2222 · #5f7679 · #48221e · #000304

Bright Accent

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.

#e6f5f7 · #bccdd0 · #8ea1a4 · #0f2a2e · #00070a · #ff2222

Complementary

The opposite hue on the perceptual wheel, tempered to field strength — warm/cool tension without vibration.

#dbd9b3 · #42cff9 · #ff2222 · #9e6485 · #30405c · #041223

Split-complementary

The complement's two neighbours instead of the complement itself — strong contrast with a lower clash risk.

#d6f9ff · #00c2a7 · #ff2222 · #0079af · #00382f · #00050f

Triadic

Three hues spaced evenly around the wheel; the anchor leads and the other two are held at supporting strength.

#d4ffd9 · #29c758 · #ff2222 · #3858fe · #110093 · #000200

Tetradic

Two complementary pairs offset by 90° — the richest chord, kept usable by a strict lightness hierarchy.

#edf9c1 · #9fb400 · #ff2222 · #00808e · #3d0075 · #000304

Tints, shades & muted variants

Tints

#FF5F52 · #FF8476 · #FFA397 · #FFBEB5 · #FFD9D3

Shades

#D8000E · #AD0008 · #840004 · #5D0001 · #390000

Muted

#EA4E42 · #D46559 · #BC766D

Using Red Stop

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.