redwarmCC0 survey name

Dried Blood #4B0101

Dried Blood is a dark, vivid warm color (#4B0101; HSL 0° 97% 15%). Name from the public-domain xkcd color survey (CC0), where it was contributed as “dried blood”.

Use cases: Alerts · Attention accents

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Families: Reds · Maroon Colors · Burgundy Colors

Color values

FormatValue
HEX#4B0101
RGBrgb(75, 1, 1)
HSLhsl(0, 97%, 15%)
HSVhsv(0, 99%, 29%)
OKLCHoklch(26.04% 0.105 28.9)
OKLaboklab(26.04% 0.0921 0.0508)
CMYKcmyk(0%, 98.7%, 98.7%, 70.6%)
XYZxyz(2.9184, 1.5203, 0.1685)
CIE-LABlab(12.7, 32.7, 19.5)
CIE-LCHlch(12.7, 38.1, 30.9°)
Luminance0.015 (WCAG relative)
/* Dried Blood */ --dried-blood: #4b0101; color: #4b0101; background-color: #4b0101;

Source: xkcd color survey name (public domain, CC0). CSS keyword: driedblood.

Shade scale

Perceptual 50–950 scale, interpolated in CIE-LAB. Step 500 is the base color. Edit in the shade generator →

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950

OKLCH ramp (perceptually uniform, modern CSS)

50
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950

Shades (toward black)

#440401 #3e0601 #370801 #310900 #2b0900 #250800 #1f0600 #180400 #0f0200 #000000

Tints (toward white)

#5e1d1b #723530 #844c47 #97645e #a97d77 #ba9591 #ccafab #ddc9c6 #eee4e2 #ffffff

Tones (toward gray)

#470705 #440c0a #40110e #3c1411 #391714 #351917 #301c19 #2c1e1c #271f1e #212121

Color harmonies

Complementary

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#4B0101
#014B4B
#4b0101 #014b4b

Analogous

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#4B0126
#4B0101
#4B2601
#4b0126 #4b0101 #4b2601

Triadic

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#4B0101
#014B01
#01014B
#4b0101 #014b01 #01014b

Tetradic

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#4B0101
#264B01
#014B4B
#26014B
#4b0101 #264b01 #014b4b #26014b

Square

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#4B0101
#264B01
#014B4B
#26014B
#4b0101 #264b01 #014b4b #26014b

Split Complementary

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#4B0101
#014B26
#01264B
#4b0101 #014b26 #01264b

Monochromatic

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#1E0000
#1E0000
#4B0101
#870202
#C40303
#1e0000 #1e0000 #4b0101 #870202 #c40303

Accessibility & contrast

16.10
#4B0101 on #FFFFFF
AA text ✓AA large ✓AAA text ✓UI 3:1 ✓
1.30
#4B0101 on #000000
AA text ✗AA large ✗AAA text ✗UI 3:1 ✗

Best text on dried blood

16.10
#FFFFFF text

WCAG 2.1: AA needs ≥4.5:1 for normal text, ≥3:1 for large text and UI components; AAA needs ≥7:1 / ≥4.5:1. Open the contrast checker →

Color blindness preview

Simulation using the Machado et al. (2009) physiological model, severity 1.0. This is an approximation of perception — not a medical assessment.

Normal vision
Protanopia (red-blind)
#1B1700
Deuteranopia (green-blind)
#2D2700
Tritanopia (blue-blind)
#540002

Closest named colors

Nearest matches by CIEDE2000 perceptual distance (ΔE₀₀) across the full color database.

ColorNameΔE₀₀
Mahogany #4A01000.24
Deep Brown #4102002.51
Rosewood #65000B5.44
Dark Maroon #3C00085.77
Claret #6800186.58
Reddy Brown #6E10058.89

Colors that go with dried blood

Top matches by hue harmony, contrast and saturation compatibility.

Dirty Pink #CA7B80
5.1:1
Same hue family as dried blood (Δh 4°) — guaranteed harmony
Camel #C19A6B
6.2:1
Analogous hue (Δh ≈33°) — neighbors on the color wheel
Periwinkle #CCCCFF
10.5:1
Triadic harmony (Δh ≈120°) — balanced three-way contrast
Seafoam #7FE0B3
10.1:1
Split-complementary angle (Δh ≈152°) — strong but softer than direct complement
Aqua #00FFFF
12.8:1
Complementary hue (Δh ≈180°) — maximum hue contrast

Values computed from the sRGB color model. CMYK is the naive sRGB conversion without an ICC profile. RGB percentages may differ between color-managed applications.