Recognised as Colour

#EF1100

#EF1100
Red
Dark
Nearest: Red

#EF1100 is a red with RGB values 239, 17, 0 and HSL 4°, 100%, 47%. It is a dark colour, so black text on it reaches 4.8:1 contrast (AA for normal text). The nearest named colour is Red.

Colour values

#EF1100#EF1100

HEX#EF1100

RGBrgb(239, 17, 0)

RGB (0–1)0.9373, 0.0667, 0

RGB percentages93.7%, 6.7%, 0%

HSLhsl(4.3, 100%, 46.9%)

HSV / HSBhsv(4.3, 100%, 93.7%)

CMYK0%, 92.9%, 100%, 6.3%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer15,667,456

CSS custom property--colour: #EF1100;

Brightness & contrast

Relative luminance0.18752WCAG 2.x, 0 is black and 1 is white

Perceived brightness131.3 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundBlackcontrast 4.75:1

Contrast with white4.42:1WCAG normal text: Fail

Contrast with black4.75:1WCAG normal text: AA

Greyscale equivalent#3F3F3F

Inverted#10EEFF

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#685A00no red cones; affects about 1% of men; ΔE 81 from the original

Deuteranopia#9A8800no green cones; the most common form, about 1% of men; ΔE 80.3 from the original

Tritanopia#FF0016no blue cones; rare, and affects men and women equally; ΔE 6.8 from the original

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

Contrast with white, large text4.42:1WCAG large text: AA

Contrast with black, large text4.75:1WCAG large text: AAA

Named colours

Red · ΔE 6.7 Orange red · ΔE 11.2 Tomato · ΔE 27.3 Crimson · ΔE 31 Firebrick · ΔE 34.5 Coral · ΔE 37.9

Nearest named CSS colourRed (#FF0000)ΔE 6.67, clearly different but related

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#00DEEF

Analogous#EF0066, #EF8800

Triadic#00EF11, #1100EF

Split complementary#00EF89, #0066EF

Tetradic#67EF00, #00DEEF, #8900EF

Tints, shades & saturation

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

Lighter +40%#FFC1BC

Lighter +30%#FF9189

Lighter +20%#FF6256

Lighter +10%#FF3323

Darker −10%#BC0D00

Darker −20%#890A00

Darker −30%#560600

Darker −40%#230200

More saturated +25%#EF1100

Less saturated −25%#D12B1E

Channel breakdown

R239

G17

Red239 (93.7%)

Green17 (6.7%)

Blue0 (0%)

Hue4.27°

Saturation (HSL)100%

Lightness46.86%

Dominant channelRed

Hex per channelR EF · G 11 · B 00

Keep nerding

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

#EF1100

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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