Colour

#F10400

#F10400
Red
Dark
Nearest: Red

#F10400 is a red with RGB values 241, 4, 0 and HSL 1°, 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

#F10400#F10400

HEX#F10400

RGBrgb(241, 4, 0)

RGB (0–1)0.9451, 0.0157, 0

RGB percentages94.5%, 1.6%, 0%

HSLhsl(1, 100%, 47.3%)

HSV / HSBhsv(1, 100%, 94.5%)

CMYK0%, 98.3%, 100%, 5.5%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer15,795,200

CSS custom property--colour: #F10400;

Brightness & contrast

Relative luminance0.18788WCAG 2.x, 0 is black and 1 is white

Perceived brightness131.8 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundBlackcontrast 4.76:1

Contrast with white4.41:1WCAG normal text: Fail

Contrast with black4.76:1WCAG normal text: AA

Greyscale equivalent#363636

Inverted#0EFBFF

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#675A00no red cones; affects about 1% of men; ΔE 83.1 from the original

Deuteranopia#9A8800no green cones; the most common form, about 1% of men; ΔE 81.9 from the original

Tritanopia#FF0010no blue cones; rare, and affects men and women equally; ΔE 4.9 from the original

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

Contrast with white, large text4.41:1WCAG large text: AA

Contrast with black, large text4.76:1WCAG large text: AAA

Named colours

Red · ΔE 5.4 Orange red · ΔE 12.1 Tomato · ΔE 28.4 Crimson · ΔE 31.5 Firebrick · ΔE 35.6 Coral · ΔE 39.2

Nearest named CSS colourRed (#FF0000)ΔE 5.37, clearly different but related

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#00EDF1

Analogous#F10075, #F17C00

Triadic#00F104, #0400F1

Split complementary#00F17C, #0075F1

Tetradic#75F100, #00EDF1, #7C00F1

Tints, shades & saturation

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

Lighter +40%#FFBFBE

Lighter +30%#FF8D8B

Lighter +20%#FF5B58

Lighter +10%#FF2925

Darker −10%#BE0300

Darker −20%#8B0200

Darker −30%#580100

Darker −40%#250100

More saturated +25%#F10400

Less saturated −25%#D3211E

Channel breakdown

R241

Red241 (94.5%)

Green4 (1.6%)

Blue0 (0%)

Hue1°

Saturation (HSL)100%

Lightness47.25%

Dominant channelRed

Hex per channelR F1 · G 04 · B 00

Keep nerding

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#F10400

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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