Colour

#FF1511

#FF1511
Red
Dark
Nearest: Red

#FF1511 is a red with RGB values 255, 21, 17 and HSL 1°, 100%, 53%. It is a dark colour, so black text on it reaches 5.4:1 contrast (AA for normal text). The nearest named colour is Red.

Colour values

#FF1511#FF1511

HEX#FF1511

RGBrgb(255, 21, 17)

RGB (0–1)1, 0.0824, 0.0667

RGB percentages100%, 8.2%, 6.7%

HSLhsl(1, 100%, 53.3%)

HSV / HSBhsv(1, 93.3%, 100%)

CMYK0%, 91.8%, 93.3%, 0%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer16,717,073

CSS custom property--colour: #FF1511;

Brightness & contrast

Relative luminance0.21837WCAG 2.x, 0 is black and 1 is white

Perceived brightness140.5 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundBlackcontrast 5.37:1

Contrast with white3.91:1WCAG normal text: Fail

Contrast with black5.37:1WCAG normal text: AA

Greyscale equivalent#464646

Inverted#00EAEE

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#6F6205no red cones; affects about 1% of men; ΔE 85.2 from the original

Deuteranopia#A49200no green cones; the most common form, about 1% of men; ΔE 84.8 from the original

Tritanopia#FF001Cno blue cones; rare, and affects men and women equally; ΔE 4.7 from the original

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

Contrast with white, large text3.91:1WCAG large text: AA

Contrast with black, large text5.37:1WCAG large text: AAA

Named colours

Red · ΔE 4.3 Orange red · ΔE 12.8 Tomato · ΔE 27.9 Crimson · ΔE 31.3 Firebrick · ΔE 37.2 Coral · ΔE 39.1

Nearest named CSS colourRed (#FF0000)ΔE 4.35, a close match

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#11FBFF

Analogous#FF1184, #FF8C11

Triadic#11FF15, #1511FF

Split complementary#11FF8C, #1184FF

Tetradic#84FF11, #11FBFF, #8C11FF

Tints, shades & saturation

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

Lighter +40%#FFDEDD

Lighter +30%#FFABAA

Lighter +20%#FF7977

Lighter +10%#FF4744

Darker −10%#DD0400

Darker −20%#AA0300

Darker −30%#770200

Darker −40%#440100

More saturated +25%#FF1511

Less saturated −25%#E1322F

Channel breakdown

R255

G21

B17

Red255 (100%)

Green21 (8.2%)

Blue17 (6.7%)

Hue1.01°

Saturation (HSL)100%

Lightness53.33%

Dominant channelRed

Hex per channelR FF · G 15 · B 11

Keep nerding

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#FF1511

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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