Recognised as Colour

#B1001D

#B1001D
Red
Dark
Nearest: Firebrick

#B1001D is a red with RGB values 177, 0, 29 and HSL 350°, 100%, 35%. It is a dark colour, so white text on it reaches 7.3:1 contrast (AAA for normal text). The nearest named colour is Firebrick.

Colour values

#B1001D#B1001D

HEX#B1001D

RGBrgb(177, 0, 29)

RGB (0–1)0.6941, 0, 0.1137

RGB percentages69.4%, 0%, 11.4%

HSLhsl(350.2, 100%, 34.7%)

HSV / HSBhsv(350.2, 100%, 69.4%)

CMYK0%, 100%, 83.6%, 30.6%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer11,599,901

CSS custom property--colour: #B1001D;

Brightness & contrast

Relative luminance0.09436WCAG 2.x, 0 is black and 1 is white

Perceived brightness97.3 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 7.27:1

Contrast with white7.27:1WCAG normal text: AAA

Contrast with black2.89:1WCAG normal text: Fail

Greyscale equivalent#282828

Inverted#4EFFE2

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#48401Bno red cones; affects about 1% of men; ΔE 65.9 from the original

Deuteranopia#6F6313no green cones; the most common form, about 1% of men; ΔE 66.1 from the original

Tritanopia#C40011no blue cones; rare, and affects men and women equally; ΔE 12.5 from the original

Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning

Contrast with white, large text7.27:1WCAG large text: AAA

Contrast with black, large text2.89:1WCAG large text: Fail

Named colours

Firebrick · ΔE 5.9 Dark red · ΔE 13.9 Brown · ΔE 13.9 Crimson · ΔE 14.7 Maroon · ΔE 17.4 Tomato · ΔE 26.9

Nearest named CSS colourFirebrick (#B22222)ΔE 5.93, clearly different but related

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

base +30°+90°+120°+180°+210°+240°+270°+330°

Complementary#00B194

Analogous#B10076, #B13B00

Triadic#1DB100, #001DB1

Split complementary#00B13B, #0076B1

Tetradic#76B100, #00B194, #3B00B1

Tints, shades & saturation

+40%+30%+20%+10%base -10%-20%-30%-40%

Lighter +40%#FF7E93

Lighter +30%#FF4B68

Lighter +20%#FF183E

Lighter +10%#E40025

Darker −10%#7E0015

Darker −20%#4B000C

Darker −30%#180004

Darker −40%#000000

More saturated +25%#B1001D

Less saturated −25%#9B162C

Channel breakdown

R177

B29

Red177 (69.4%)

Green0 (0%)

Blue29 (11.4%)

Hue350.17°

Saturation (HSL)100%

Lightness34.71%

Dominant channelRed

Hex per channelR B1 · G 00 · B 1D

Keep nerding

Every link below is a page Nerdulator can generate from what it already knows about this value.

#B1001D

Colour values

Brightness & contrast

Colour vision & accessibility

Named colours

Colour harmonies

Tints, shades & saturation

Channel breakdown

Keep nerding

Harmonies

Lighter and darker

Similar named colours

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