Blood Donor `#EA1822`

Blood Donor (#EA1822) is a mid-tone, vivid red with an OKLCH hue of 27°, lightness 0.6 and chroma 0.234. 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	`#EA1822`
RGB	`rgb(234, 24, 34)`
HSL	`hsl(357, 83%, 51%)`
HSV	`hsv(357, 90%, 92%)`
CMYK	`cmyk(0%, 90%, 85%, 8%)`
CIE Lab	`lab(49.8 73.1 51.6)`
OKLCH	`oklch(0.596 0.234 27)`

How Blood Donor behaves under real light

Under warm 2700K interior light Blood Donor is virtually unchanged; in north-facing or shaded light it is virtually unchanged. Overall drift across common illuminants is small (max ΔE ≈ 0.8), so it is a lighting-stable choice.

Warm interior (2700K incandescent / warm LED): → #ea081c — ΔE 0.7, is virtually unchanged
Neutral LED (4000K task and retail lighting): → #ee121f — ΔE 0.8, is virtually unchanged
Daylight (6500K standard daylight (reference)): → #ea1822 — ΔE 0.0, is virtually unchanged
Blue-sky shade (cool daylight (~10000K proxy)): → #eb1923 — ΔE 0.2, is virtually unchanged

Test Blood Donor 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 4.51:1 and against black 4.65:1, so black text is the stronger pairing. That pairing passes WCAG AA for body text.

Colors that go with Blood Donor

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.

#ffc6bf · #ff867a · #ea1822 · #be0013 · #820008 · #4a0002

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.

#ef8400 · #ed5c00 · #ea1822 · #ca004e · #a70062 · #84006c

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.

#f5ad00 · #c4943e · #ea1822 · #b90815 · #89000a · #3d2800

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.

#00ddf2 · #c89089 · #ea1822 · #9b3c35 · #73201c · #45100e

Quiet Support

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

#daf9fd · #b5908b · #ea1822 · #54696c · #411e1a · #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 · #0f2a2d · #000709 · #ea1822

Complementary

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

#d1d6b1 · #3acaa9 · #ea1822 · #8a5b81 · #2f3e2c · #170b03

Split-complementary

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

#d5faff · #00b398 · #ea1822 · #006d9c · #003229 · #000610

Triadic

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

#d5ffd8 · #2cb74d · #ea1822 · #2b4de7 · #0b0086 · #000200

Tetradic

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

#eef9c3 · #94a500 · #ea1822 · #00727e · #36006b · #000304

Tints, shades & muted variants

Tints

#F64E46 · #FF7267 · #FF978C · #FFB7AF · #FFD5D0

Shades

#C50014 · #9F000D · #7A0007 · #570003 · #360001

Muted

#D7443D · #C25B52 · #AC6B63

Using Blood Donor

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.