Recognised as Colour

#EF0023

#EF0023
Red
Dark
Nearest: Red

#EF0023 is a red with RGB values 239, 0, 35 and HSL 351°, 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 Red.

Colour values

#EF0023#EF0023

HEX#EF0023

RGBrgb(239, 0, 35)

RGB (0–1)0.9373, 0, 0.1373

RGB percentages93.7%, 0%, 13.7%

HSLhsl(351.2, 100%, 46.9%)

HSV / HSBhsv(351.2, 100%, 93.7%)

CMYK0%, 100%, 85.4%, 6.3%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer15,663,139

CSS custom property--colour: #EF0023;

Brightness & contrast

Relative luminance0.18472WCAG 2.x, 0 is black and 1 is white

Perceived brightness131.2 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundBlackcontrast 4.69:1

Contrast with white4.47:1WCAG normal text: Fail

Contrast with black4.69:1WCAG normal text: AA

Greyscale equivalent#353535

Inverted#10FFDC

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#645920no red cones; affects about 1% of men; ΔE 82.7 from the original

Deuteranopia#988712no green cones; the most common form, about 1% of men; ΔE 82.3 from the original

Tritanopia#FF0018no blue cones; rare, and affects men and women equally; ΔE 10 from the original

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

Contrast with white, large text4.47:1WCAG large text: AA

Contrast with black, large text4.69:1WCAG large text: AAA

Named colours

Red · ΔE 16.1 Crimson · ΔE 19.3 Orange red · ΔE 20.7 Tomato · ΔE 23 Firebrick · ΔE 27.4 Dark red · ΔE 35.4

Nearest named CSS colourRed (#FF0000)ΔE 16.12, a distinctly different colour

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#00EFCC

Analogous#EF009B, #EF5500

Triadic#23EF00, #0023EF

Split complementary#00EF55, #009BEF

Tetradic#9AEF00, #00EFCC, #5400EF

Tints, shades & saturation

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

Lighter +40%#FFBCC6

Lighter +30%#FF899A

Lighter +20%#FF566F

Lighter +10%#FF2343

Darker −10%#BC001C

Darker −20%#890014

Darker −30%#56000D

Darker −40%#230005

More saturated +25%#EF0023

Less saturated −25%#D11E38

Channel breakdown

R239

B35

Red239 (93.7%)

Green0 (0%)

Blue35 (13.7%)

Hue351.21°

Saturation (HSL)100%

Lightness46.86%

Dominant channelRed

Hex per channelR EF · G 00 · B 23

Keep nerding

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

#EF0023

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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