Colour

#A4000A

#A4000A
Red
Dark
Nearest: Firebrick

#A4000A is a red with RGB values 164, 0, 10 and HSL 356°, 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

#A4000A#A4000A

HEX#A4000A

RGBrgb(164, 0, 10)

RGB (0–1)0.6431, 0, 0.0392

RGB percentages64.3%, 0%, 3.9%

HSLhsl(356.3, 100%, 32.2%)

HSV / HSBhsv(356.3, 100%, 64.3%)

CMYK0%, 100%, 93.9%, 35.7%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer10,747,914

CSS custom property--colour: #A4000A;

Brightness & contrast

Relative luminance0.07914WCAG 2.x, 0 is black and 1 is white

Perceived brightness89.7 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 8.13:1

Contrast with white8.13:1WCAG normal text: AAA

Contrast with black2.58:1WCAG normal text: Fail

Greyscale equivalent#242424

Inverted#5BFFF5

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#433A06no red cones; affects about 1% of men; ΔE 62.2 from the original

Deuteranopia#675B00no green cones; the most common form, about 1% of men; ΔE 62.1 from the original

Tritanopia#B60009no blue cones; rare, and affects men and women equally; ΔE 7.7 from the original

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

Contrast with white, large text8.13:1WCAG large text: AAA

Contrast with black, large text2.58:1WCAG large text: Fail

Named colours

Firebrick · ΔE 8.4 Dark red · ΔE 9.2 Maroon · ΔE 14 Brown · ΔE 16 Crimson · ΔE 21.4 Tomato · ΔE 28.5

Nearest named CSS colourFirebrick (#B22222)ΔE 8.4, clearly different but related

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#00A49A

Analogous#A4005C, #A44800

Triadic#0AA400, #000AA4

Split complementary#00A448, #005CA4

Tetradic#5CA400, #00A49A, #4800A4

Tints, shades & saturation

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

Lighter +40%#FF717A

Lighter +30%#FF3E4A

Lighter +20%#FF0B1A

Lighter +10%#D7000D

Darker −10%#710007

Darker −20%#3E0004

Darker −30%#0B0001

Darker −40%#000000

More saturated +25%#A4000A

Less saturated −25%#90141C

Channel breakdown

R164

B10

Red164 (64.3%)

Green0 (0%)

Blue10 (3.9%)

Hue356.34°

Saturation (HSL)100%

Lightness32.16%

Dominant channelRed

Hex per channelR A4 · G 00 · B 0A

Keep nerding

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

#A4000A

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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