Recognised as Colour

#F3311A

#F3311A
Red
Dark
Nearest: Orange red

#F3311A is a red with RGB values 243, 49, 26 and HSL 6°, 90%, 53%. It is a dark colour, so black text on it reaches 5.3:1 contrast (AA for normal text). The nearest named colour is Orange red.

Colour values

#F3311A#F3311A

HEX#F3311A

RGBrgb(243, 49, 26)

RGB (0–1)0.9529, 0.1922, 0.102

RGB percentages95.3%, 19.2%, 10.2%

HSLhsl(6.4, 90%, 52.7%)

HSV / HSBhsv(6.4, 89.3%, 95.3%)

CMYK0%, 79.8%, 89.3%, 4.7%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer15,937,818

CSS custom property--colour: #F3311A;

Brightness & contrast

Relative luminance0.21326WCAG 2.x, 0 is black and 1 is white

Perceived brightness138.4 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundBlackcontrast 5.27:1

Contrast with white3.99:1WCAG normal text: Fail

Contrast with black5.27:1WCAG normal text: AA

Greyscale equivalent#595959

Inverted#0CCEE5

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#726412no red cones; affects about 1% of men; ΔE 76 from the original

Deuteranopia#A08E02no green cones; the most common form, about 1% of men; ΔE 76.3 from the original

Tritanopia#FF002Fno blue cones; rare, and affects men and women equally; ΔE 13.4 from the original

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

Contrast with white, large text3.99:1WCAG large text: AA

Contrast with black, large text5.27:1WCAG large text: AAA

Named colours

Orange red · ΔE 11.5 Red · ΔE 13 Tomato · ΔE 19.6 Crimson · ΔE 25.7 Firebrick · ΔE 29.1 Coral · ΔE 30.7

Nearest named CSS colourOrange red (#FF4500)ΔE 11.54, a distinctly different colour

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#1ADCF3

Analogous#F31A70, #F39D1A

Triadic#1AF331, #311AF3

Split complementary#1AF39D, #1A70F3

Tetradic#70F31A, #1ADCF3, #9D1AF3

Tints, shades & saturation

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

Lighter +40%#FDDFDC

Lighter +30%#FBB4AB

Lighter +20%#F8887B

Lighter +10%#F65D4A

Darker −10%#CF200B

Darker −20%#9F1808

Darker −30%#6E1106

Darker −40%#3E0903

More saturated +25%#FF280E

Less saturated −25%#D54938

Channel breakdown

R243

G49

B26

Red243 (95.3%)

Green49 (19.2%)

Blue26 (10.2%)

Hue6.36°

Saturation (HSL)90.04%

Lightness52.75%

Dominant channelRed

Hex per channelR F3 · G 31 · B 1A

Keep nerding

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

#F3311A

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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