Recognised as Colour

#E40504

#E40504
Red
Dark
Nearest: Red

#E40504 is a red with RGB values 228, 5, 4 and HSL 0°, 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

#E40504#E40504

HEX#E40504

RGBrgb(228, 5, 4)

RGB (0–1)0.8941, 0.0196, 0.0157

RGB percentages89.4%, 2%, 1.6%

HSLhsl(0.3, 96.6%, 45.5%)

HSV / HSBhsv(0.3, 98.2%, 89.4%)

CMYK0%, 97.8%, 98.2%, 10.6%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer14,943,492

CSS custom property--colour: #E40504;

Brightness & contrast

Relative luminance0.16611WCAG 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 4.86:1

Contrast with white4.86:1WCAG normal text: AA

Contrast with black4.32:1WCAG normal text: Fail

Greyscale equivalent#343434

Inverted#1BFAFB

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

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

Deuteranopia#928100no green cones; the most common form, about 1% of men; ΔE 78.5 from the original

Tritanopia#FC0010no blue cones; rare, and affects men and women equally; ΔE 8.2 from the original

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

Contrast with white, large text4.86:1WCAG large text: AAA

Contrast with black, large text4.32:1WCAG large text: AA

Named colours

Red · ΔE 11 Orange red · ΔE 14 Tomato · ΔE 25.4 Crimson · ΔE 27.1 Firebrick · ΔE 30 Dark red · ΔE 35.4

Nearest named CSS colourRed (#FF0000)ΔE 10.97, a distinctly different colour

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#04E3E4

Analogous#E40473, #E47504

Triadic#04E405, #0504E4

Split complementary#04E475, #0473E4

Tetradic#73E404, #04E3E4, #7504E4

Tints, shades & saturation

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

Lighter +40%#FEB7B6

Lighter +30%#FD8584

Lighter +20%#FC5352

Lighter +10%#FB2120

Darker −10%#B20403

Darker −20%#800302

Darker −30%#4E0201

Darker −40%#1C0100

More saturated +25%#E80100

Less saturated −25%#C72221

Channel breakdown

R228

Red228 (89.4%)

Green5 (2%)

Blue4 (1.6%)

Hue0.27°

Saturation (HSL)96.55%

Lightness45.49%

Dominant channelRed

Hex per channelR E4 · G 05 · B 04

Keep nerding

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

#E40504

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

Nerdulate something else