Colour

#A50017

#A50017
Red
Dark
Nearest: Firebrick

#A50017 is a red with RGB values 165, 0, 23 and HSL 352°, 100%, 32%. It is a dark colour, so white text on it reaches 8:1 contrast (AAA for normal text). The nearest named colour is Firebrick.

Colour values

#A50017#A50017

HEX#A50017

RGBrgb(165, 0, 23)

RGB (0–1)0.6471, 0, 0.0902

RGB percentages64.7%, 0%, 9%

HSLhsl(351.6, 100%, 32.4%)

HSV / HSBhsv(351.6, 100%, 64.7%)

CMYK0%, 100%, 86.1%, 35.3%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer10,813,463

CSS custom property--colour: #A50017;

Brightness & contrast

Relative luminance0.08061WCAG 2.x, 0 is black and 1 is white

Perceived brightness90.6 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 8.04:1

Contrast with white8.04:1WCAG normal text: AAA

Contrast with black2.61:1WCAG normal text: Fail

Greyscale equivalent#252525

Inverted#5AFFE8

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#433B15no red cones; affects about 1% of men; ΔE 62.5 from the original

Deuteranopia#675B0Dno green cones; the most common form, about 1% of men; ΔE 62.3 from the original

Tritanopia#B7000Eno blue cones; rare, and affects men and women equally; ΔE 10.8 from the original

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

Contrast with white, large text8.04:1WCAG large text: AAA

Contrast with black, large text2.61:1WCAG large text: Fail

Named colours

Firebrick · ΔE 5.5 Dark red · ΔE 9.9 Brown · ΔE 11.8 Maroon · ΔE 13.3 Crimson · ΔE 18.7 Indian red · ΔE 28.3

Nearest named CSS colourFirebrick (#B22222)ΔE 5.5, clearly different but related

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#00A58E

Analogous#A5006A, #A53B00

Triadic#17A500, #0017A5

Split complementary#00A53B, #006AA5

Tetradic#6AA500, #00A58E, #3B00A5

Tints, shades & saturation

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

Lighter +40%#FF7286

Lighter +30%#FF3F5A

Lighter +20%#FF0C2E

Lighter +10%#D8001E

Darker −10%#720010

Darker −20%#3F0009

Darker −30%#0C0002

Darker −40%#000000

More saturated +25%#A50017

Less saturated −25%#901526

Channel breakdown

R165

B23

Red165 (64.7%)

Green0 (0%)

Blue23 (9%)

Hue351.64°

Saturation (HSL)100%

Lightness32.35%

Dominant channelRed

Hex per channelR A5 · G 00 · B 17

Keep nerding

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

#A50017

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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