Recognised as Colour

#E40307

#E40307
Red
Dark
Nearest: Red

#E40307 is a red with RGB values 228, 3, 7 and HSL 359°, 97%, 45%. It is a dark colour, so white text on it reaches 4.9:1 contrast (AA for normal text). The nearest named colour is Red.

Colour values

#E40307#E40307

HEX#E40307

RGBrgb(228, 3, 7)

RGB (0–1)0.8941, 0.0118, 0.0275

RGB percentages89.4%, 1.2%, 2.7%

HSLhsl(358.9, 97.4%, 45.3%)

HSV / HSBhsv(358.9, 98.7%, 89.4%)

CMYK0%, 98.7%, 96.9%, 10.6%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer14,942,983

CSS custom property--colour: #E40307;

Brightness & contrast

Relative luminance0.16574WCAG 2.x, 0 is black and 1 is white

Perceived brightness124.7 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 4.87:1

Contrast with white4.87:1WCAG normal text: AA

Contrast with black4.31:1WCAG normal text: Fail

Greyscale equivalent#333333

Inverted#1BFCF8

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#615500no red cones; affects about 1% of men; ΔE 79.5 from the original

Deuteranopia#918100no green cones; the most common form, about 1% of men; ΔE 79.2 from the original

Tritanopia#FC000Fno blue cones; rare, and affects men and women equally; ΔE 8.4 from the original

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

Contrast with white, large text4.87:1WCAG large text: AAA

Contrast with black, large text4.31:1WCAG large text: AA

Named colours

Red · ΔE 11.4 Orange red · ΔE 14.6 Tomato · ΔE 25.1 Crimson · ΔE 26.3 Firebrick · ΔE 29.5 Dark red · ΔE 35.1

Nearest named CSS colourRed (#FF0000)ΔE 11.42, a distinctly different colour

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#03E4E0

Analogous#E40377, #E47003

Triadic#07E403, #0307E4

Split complementary#03E46F, #0377E4

Tetradic#77E403, #03E4E0, #7003E4

Tints, shades & saturation

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

Lighter +40%#FEB5B6

Lighter +30%#FD8385

Lighter +20%#FD5053

Lighter +10%#FC1E22

Darker −10%#B20205

Darker −20%#7F0204

Darker −30%#4D0102

Darker −40%#1B0001

More saturated +25%#E70004

Less saturated −25%#C72023

Channel breakdown

R228

Red228 (89.4%)

Green3 (1.2%)

Blue7 (2.7%)

Hue358.93°

Saturation (HSL)97.4%

Lightness45.29%

Dominant channelRed

Hex per channelR E4 · G 03 · B 07

Keep nerding

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

#E40307

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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