Colour

#EF3400

#EF3400
Red
Dark
Nearest: Orange red

#EF3400 is a red with RGB values 239, 52, 0 and HSL 13°, 100%, 47%. It is a dark colour, so black text on it reaches 5.2:1 contrast (AA for normal text). The nearest named colour is Orange red.

Colour values

#EF3400#EF3400

HEX#EF3400

RGBrgb(239, 52, 0)

RGB (0–1)0.9373, 0.2039, 0

RGB percentages93.7%, 20.4%, 0%

HSLhsl(13.1, 100%, 46.9%)

HSV / HSBhsv(13.1, 100%, 93.7%)

CMYK0%, 78.2%, 100%, 6.3%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer15,676,416

CSS custom property--colour: #EF3400;

Brightness & contrast

Relative luminance0.20807WCAG 2.x, 0 is black and 1 is white

Perceived brightness136.6 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundBlackcontrast 5.16:1

Contrast with white4.07:1WCAG normal text: Fail

Contrast with black5.16:1WCAG normal text: AA

Greyscale equivalent#585858

Inverted#10CBFF

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#726300no red cones; affects about 1% of men; ΔE 74.2 from the original

Deuteranopia#9F8D00no green cones; the most common form, about 1% of men; ΔE 74.1 from the original

Tritanopia#FF002Eno blue cones; rare, and affects men and women equally; ΔE 19.2 from the original

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

Contrast with white, large text4.07:1WCAG large text: AA

Contrast with black, large text5.16:1WCAG large text: AAA

Named colours

Orange red · ΔE 6.2 Red · ΔE 12.1 Tomato · ΔE 23.3 Crimson · ΔE 32.1 Coral · ΔE 32.3 Chocolate · ΔE 32.4

Nearest named CSS colourOrange red (#FF4500)ΔE 6.22, clearly different but related

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#00BBEF

Analogous#EF0044, #EFAC00

Triadic#00EF34, #3400EF

Split complementary#00EFAC, #0043EF

Tetradic#43EF00, #00BBEF, #AC00EF

Tints, shades & saturation

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

Lighter +40%#FFCBBC

Lighter +30%#FFA389

Lighter +20%#FF7B56

Lighter +10%#FF5323

Darker −10%#BC2900

Darker −20%#891E00

Darker −30%#561300

Darker −40%#230800

More saturated +25%#EF3400

Less saturated −25%#D1451E

Channel breakdown

R239

G52

Red239 (93.7%)

Green52 (20.4%)

Blue0 (0%)

Hue13.05°

Saturation (HSL)100%

Lightness46.86%

Dominant channelRed

Hex per channelR EF · G 34 · B 00

Keep nerding

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#EF3400

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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