redwarmCC0 survey name

Dull Red #BB3F3F

Dull Red is a mid-tone, moderately saturated warm color (#BB3F3F; HSL 0° 50% 49%). Name from the public-domain xkcd color survey (CC0), where it was contributed as “dull red”.

Use cases: Alerts · Attention accents

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Families: Reds · Rose Colors

Color values

FormatValue
HEX#BB3F3F
RGBrgb(187, 63, 63)
HSLhsl(0, 50%, 49%)
HSVhsv(0, 66%, 73%)
OKLCHoklch(54.43% 0.16 24.1)
OKLaboklab(54.43% 0.146 0.0654)
CMYKcmyk(0%, 66.3%, 66.3%, 26.7%)
XYZxyz(23.1706, 14.482, 6.2769)
CIE-LABlab(44.9, 49.8, 27.8)
CIE-LCHlch(44.9, 57.0, 29.2°)
Luminance0.145 (WCAG relative)
/* Dull Red */ --dull-red: #bb3f3f; color: #bb3f3f; background-color: #bb3f3f;

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

Shade scale

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

50
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950

OKLCH ramp (perceptually uniform, modern CSS)

50
100
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950

Shades (toward black)

#a73a39 #933533 #802f2d #6d2a28 #5b2522 #491f1d #381a18 #281412 #190c0a #000000

Tints (toward white)

#c55450 #ce6862 #d77b74 #de8e86 #e6a09a #ecb3ad #f2c6c1 #f7d9d5 #fbecea #ffffff

Tones (toward gray)

#b44643 #ad4b47 #a6514c #9f5550 #975954 #8f5d59 #87615d #7e6461 #756766 #6a6a6a

Color harmonies

Complementary

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#BB3F3F
#3FBBBB
#bb3f3f #3fbbbb

Analogous

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#BB3F7D
#BB3F3F
#BB7D3F
#bb3f7d #bb3f3f #bb7d3f

Triadic

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#BB3F3F
#3FBB3F
#3F3FBB
#bb3f3f #3fbb3f #3f3fbb

Tetradic

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#BB3F3F
#7DBB3F
#3FBBBB
#7D3FBB
#bb3f3f #7dbb3f #3fbbbb #7d3fbb

Square

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#BB3F3F
#7DBB3F
#3FBBBB
#7D3FBB
#bb3f3f #7dbb3f #3fbbbb #7d3fbb

Split Complementary

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#BB3F3F
#3FBB7D
#3F7DBB
#bb3f3f #3fbb7d #3f7dbb

Monochromatic

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#5F2020
#8D3030
#BB3F3F
#CD6A6A
#DC9898
#5f2020 #8d3030 #bb3f3f #cd6a6a #dc9898

Accessibility & contrast

5.39
#BB3F3F on #FFFFFF
AA text ✓AA large ✓AAA text ✗UI 3:1 ✓
3.90
#BB3F3F on #000000
AA text ✗AA large ✓AAA text ✗UI 3:1 ✓

Best text on dull red

5.39
#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)
#60593E
Deuteranopia (green-blind)
#7F743B
Tritanopia (blue-blind)
#CD2040

Closest named colors

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

ColorNameΔE₀₀
Dusty Red #B9484E3.71
Cardinal #C41E3A4.74
Lipstick Red #C0022F6.10
Crimson #DC143C6.17
Faded Red #D3494E6.18
Firebrick #B222226.63

Colors that go with dull red

Top matches by hue harmony, contrast and saturation compatibility.

Maroon #800000
2.0:1
Same hue family as dull red (Δh 0°) — guaranteed harmony
Beige #F5F5DC
4.9:1
Warm/cool bridge (Δh 60°) — adds depth without tension
Light Mint #B6FFBB
4.6:1
Triadic harmony (Δh ≈124°) — balanced three-way contrast
Light Aquamarine #7BFDC7
4.3:1
Split-complementary angle (Δh ≈155°) — strong but softer than direct complement
Aqua #00FFFF
4.3:1
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.