Colour

#FF3131

#FF3131
Red
Dark
Nearest: Red

#FF3131 is a red with RGB values 255, 49, 49 and HSL 0°, 100%, 60%. It is a dark colour, so black text on it reaches 5.7:1 contrast (AA for normal text). The nearest named colour is Red.

Colour values

#FF3131#FF3131

HEX#FF3131

RGBrgb(255, 49, 49)

RGB (0–1)1, 0.1922, 0.1922

RGB percentages100%, 19.2%, 19.2%

HSLhsl(0, 100%, 59.6%)

HSV / HSBhsv(0, 80.8%, 100%)

CMYK0%, 80.8%, 80.8%, 0%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer16,724,273

CSS custom property--colour: #FF3131;

Brightness & contrast

Relative luminance0.23678WCAG 2.x, 0 is black and 1 is white

Perceived brightness145.3 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundBlackcontrast 5.74:1

Contrast with white3.66:1WCAG normal text: Fail

Contrast with black5.74:1WCAG normal text: AA

Greyscale equivalent#5D5D5D

Inverted#00CECE

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#75692Eno red cones; affects about 1% of men; ΔE 80.1 from the original

Deuteranopia#A79526no green cones; the most common form, about 1% of men; ΔE 79.9 from the original

Tritanopia#FF0035no blue cones; rare, and affects men and women equally; ΔE 8.3 from the original

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

Contrast with white, large text3.66:1WCAG large text: AA

Contrast with black, large text5.74:1WCAG large text: AAA

Named colours

Red · ΔE 17.3 Tomato · ΔE 18.2 Orange red · ΔE 19.1 Crimson · ΔE 19.8 Firebrick · ΔE 28.1 Coral · ΔE 31.2

Nearest named CSS colourRed (#FF0000)ΔE 17.34, a distinctly different colour

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#31FFFF

Analogous#FF3198, #FF9831

Triadic#31FF31, #3131FF

Split complementary#31FF98, #3198FF

Tetradic#98FF31, #31FFFF, #9831FF

Tints, shades & saturation

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

Lighter +40%#FFFDFD

Lighter +30%#FFCACA

Lighter +20%#FF9797

Lighter +10%#FF6464

Darker −10%#FD0000

Darker −20%#CA0000

Darker −30%#970000

Darker −40%#640000

More saturated +25%#FF3131

Less saturated −25%#E54B4B

Channel breakdown

R255

G49

B49

Red255 (100%)

Green49 (19.2%)

Blue49 (19.2%)

Hue0°

Saturation (HSL)100%

Lightness59.61%

Dominant channelRed

Hex per channelR FF · G 31 · B 31

Keep nerding

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

#FF3131

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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