Recognised as Colour

#900B0B

#900B0B
Red
Dark
Nearest: Dark red

#900B0B is a red with RGB values 144, 11, 11 and HSL 0°, 86%, 30%. It is a dark colour, so white text on it reaches 9.4:1 contrast (AAA for normal text). The nearest named colour is Dark red.

Colour values

#900B0B#900B0B

HEX#900B0B

RGBrgb(144, 11, 11)

RGB (0–1)0.5647, 0.0431, 0.0431

RGB percentages56.5%, 4.3%, 4.3%

HSLhsl(0, 85.8%, 30.4%)

HSV / HSBhsv(0, 92.4%, 56.5%)

CMYK0%, 92.4%, 92.4%, 43.5%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer9,440,011

CSS custom property--colour: #900B0B;

Brightness & contrast

Relative luminance0.06193WCAG 2.x, 0 is black and 1 is white

Perceived brightness79.3 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 9.38:1

Contrast with white9.38:1WCAG normal text: AAA

Contrast with black2.24:1WCAG normal text: Fail

Greyscale equivalent#272727

Inverted#6FF4F4

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#3C3408no red cones; affects about 1% of men; ΔE 54.8 from the original

Deuteranopia#5B5000no green cones; the most common form, about 1% of men; ΔE 54.7 from the original

Tritanopia#A0000Fno blue cones; rare, and affects men and women equally; ΔE 7 from the original

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

Contrast with white, large text9.38:1WCAG large text: AAA

Contrast with black, large text2.24:1WCAG large text: Fail

Named colours

Dark red · ΔE 3.2 Maroon · ΔE 5.2 Firebrick · ΔE 10.6 Brown · ΔE 11.2 Saddle brown · ΔE 25.6 Sienna · ΔE 25.7

Nearest named CSS colourDark red (#8B0000)ΔE 3.15, a close match

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#0B9090

Analogous#900B4E, #904E0B

Triadic#0B900B, #0B0B90

Split complementary#0B904E, #0B4E90

Tetradic#4E900B, #0B9090, #4E0B90

Tints, shades & saturation

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

Lighter +40%#F47373

Lighter +30%#F14343

Lighter +20%#ED1414

Lighter +10%#BF0F0F

Darker −10%#610707

Darker −20%#310404

Darker −30%#020000

Darker −40%#000000

More saturated +25%#9B0000

Less saturated −25%#7D1E1E

Channel breakdown

R144

G11

B11

Red144 (56.5%)

Green11 (4.3%)

Blue11 (4.3%)

Hue0°

Saturation (HSL)85.81%

Lightness30.39%

Dominant channelRed

Hex per channelR 90 · G 0B · B 0B

Keep nerding

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

#900B0B

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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