Colour

#FF0400

#FF0400
Red
Dark
Nearest: Red

#FF0400 is a red with RGB values 255, 4, 0 and HSL 1°, 100%, 50%. It is a dark colour, so black text on it reaches 5.3:1 contrast (AA for normal text). The nearest named colour is Red.

Colour values

#FF0400#FF0400

HEX#FF0400

RGBrgb(255, 4, 0)

RGB (0–1)1, 0.0157, 0

RGB percentages100%, 1.6%, 0%

HSLhsl(0.9, 100%, 50%)

HSV / HSBhsv(0.9, 100%, 100%)

CMYK0%, 98.4%, 100%, 0%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer16,712,704

CSS custom property--colour: #FF0400;

Brightness & contrast

Relative luminance0.21347WCAG 2.x, 0 is black and 1 is white

Perceived brightness139.5 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundBlackcontrast 5.27:1

Contrast with white3.99:1WCAG normal text: Fail

Contrast with black5.27:1WCAG normal text: AA

Greyscale equivalent#393939

Inverted#00FBFF

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#6D5F00no red cones; affects about 1% of men; ΔE 86.7 from the original

Deuteranopia#A39000no green cones; the most common form, about 1% of men; ΔE 85.5 from the original

Tritanopia#FF0011no blue cones; rare, and affects men and women equally; ΔE 4.4 from the original

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

Contrast with white, large text3.99:1WCAG large text: AA

Contrast with black, large text5.27:1WCAG large text: AAA

Named colours

Red · ΔE 0.3 Orange red · ΔE 12.9 Tomato · ΔE 31.5 Crimson · ΔE 35.4 Firebrick · ΔE 40.6 Coral · ΔE 42.1

Nearest named CSS colourRed (#FF0000)ΔE 0.29, indistinguishable to the eye

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#00FBFF

Analogous#FF007C, #FF8400

Triadic#00FF04, #0400FF

Split complementary#00FF84, #007BFF

Tetradic#7CFF00, #00FBFF, #8400FF

Tints, shades & saturation

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

Lighter +40%#FFCDCC

Lighter +30%#FF9B99

Lighter +20%#FF6866

Lighter +10%#FF3633

Darker −10%#CC0300

Darker −20%#990200

Darker −30%#660200

Darker −40%#330100

More saturated +25%#FF0400

Less saturated −25%#DF2320

Channel breakdown

R255

Red255 (100%)

Green4 (1.6%)

Blue0 (0%)

Hue0.94°

Saturation (HSL)100%

Lightness50%

Dominant channelRed

Hex per channelR FF · G 04 · B 00

Keep nerding

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

#FF0400

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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