Colour

#A40015

#A40015
Red
Dark
Nearest: Firebrick

#A40015 is a red with RGB values 164, 0, 21 and HSL 352°, 100%, 32%. It is a dark colour, so white text on it reaches 8.1:1 contrast (AAA for normal text). The nearest named colour is Firebrick.

Colour values

#A40015#A40015

HEX#A40015

RGBrgb(164, 0, 21)

RGB (0–1)0.6431, 0, 0.0824

RGB percentages64.3%, 0%, 8.2%

HSLhsl(352.3, 100%, 32.2%)

HSV / HSBhsv(352.3, 100%, 64.3%)

CMYK0%, 100%, 87.2%, 35.7%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer10,747,925

CSS custom property--colour: #A40015;

Brightness & contrast

Relative luminance0.07947WCAG 2.x, 0 is black and 1 is white

Perceived brightness90 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 8.11:1

Contrast with white8.11:1WCAG normal text: AAA

Contrast with black2.59:1WCAG normal text: Fail

Greyscale equivalent#242424

Inverted#5BFFEA

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#423B13no red cones; affects about 1% of men; ΔE 62.8 from the original

Deuteranopia#675B09no green cones; the most common form, about 1% of men; ΔE 62.1 from the original

Tritanopia#B5000Dno blue cones; rare, and affects men and women equally; ΔE 9.9 from the original

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

Contrast with white, large text8.11:1WCAG large text: AAA

Contrast with black, large text2.59:1WCAG large text: Fail

Named colours

Firebrick · ΔE 5.7 Dark red · ΔE 9.3 Brown · ΔE 12.2 Maroon · ΔE 12.9 Crimson · ΔE 19.2 Indian red · ΔE 28.8

Nearest named CSS colourFirebrick (#B22222)ΔE 5.71, clearly different but related

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#00A48F

Analogous#A40067, #A43D00

Triadic#15A400, #0015A4

Split complementary#00A43D, #0067A4

Tetradic#67A400, #00A48F, #3D00A4

Tints, shades & saturation

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

Lighter +40%#FF7183

Lighter +30%#FF3E57

Lighter +20%#FF0B2A

Lighter +10%#D7001C

Darker −10%#71000E

Darker −20%#3E0008

Darker −30%#0B0001

Darker −40%#000000

More saturated +25%#A40015

Less saturated −25%#901424

Channel breakdown

R164

B21

Red164 (64.3%)

Green0 (0%)

Blue21 (8.2%)

Hue352.32°

Saturation (HSL)100%

Lightness32.16%

Dominant channelRed

Hex per channelR A4 · G 00 · B 15

Keep nerding

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

#A40015

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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