Colour

#EF003D

#EF003D
Red
Dark
Nearest: Crimson

#EF003D is a red with RGB values 239, 0, 61 and HSL 345°, 100%, 47%. It is a dark colour, so black text on it reaches 4.7:1 contrast (AA for normal text). The nearest named colour is Crimson.

Colour values

#EF003D#EF003D

HEX#EF003D

RGBrgb(239, 0, 61)

RGB (0–1)0.9373, 0, 0.2392

RGB percentages93.7%, 0%, 23.9%

HSLhsl(344.7, 100%, 46.9%)

HSV / HSBhsv(344.7, 100%, 93.7%)

CMYK0%, 100%, 74.5%, 6.3%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer15,663,165

CSS custom property--colour: #EF003D;

Brightness & contrast

Relative luminance0.18688WCAG 2.x, 0 is black and 1 is white

Perceived brightness132.3 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundBlackcontrast 4.74:1

Contrast with white4.43:1WCAG normal text: Fail

Contrast with black4.74:1WCAG normal text: AA

Greyscale equivalent#373737

Inverted#10FFC2

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#625B3Cno red cones; affects about 1% of men; ΔE 82.8 from the original

Deuteranopia#968735no green cones; the most common form, about 1% of men; ΔE 82.4 from the original

Tritanopia#FF0025no blue cones; rare, and affects men and women equally; ΔE 17.6 from the original

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

Contrast with white, large text4.43:1WCAG large text: AA

Contrast with black, large text4.74:1WCAG large text: AAA

Named colours

Crimson · ΔE 8.4 Firebrick · ΔE 24.2 Tomato · ΔE 24.4 Red · ΔE 29.7 Brown · ΔE 31.3 Orange red · ΔE 33.4

Nearest named CSS colourCrimson (#DC143C)ΔE 8.36, clearly different but related

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#00EFB2

Analogous#EF00B4, #EF3B00

Triadic#3DEF00, #003DEF

Split complementary#00EF3B, #00B4EF

Tetradic#B4EF00, #00EFB2, #3B00EF

Tints, shades & saturation

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

Lighter +40%#FFBCCD

Lighter +30%#FF89A7

Lighter +20%#FF5681

Lighter +10%#FF235B

Darker −10%#BC0030

Darker −20%#890023

Darker −30%#560016

Darker −40%#230009

More saturated +25%#EF003D

Less saturated −25%#D11E4C

Channel breakdown

R239

B61

Red239 (93.7%)

Green0 (0%)

Blue61 (23.9%)

Hue344.69°

Saturation (HSL)100%

Lightness46.86%

Dominant channelRed

Hex per channelR EF · G 00 · B 3D

Keep nerding

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#EF003D

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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