Colour

#F10000

#F10000
Red
Dark
Nearest: Red

#F10000 is a red with RGB values 241, 0, 0 and HSL 0°, 100%, 47%. It is a dark colour, so black text on it reaches 4.7:1 contrast (AA for normal text). The nearest named colour is Red.

Colour values

#F10000#F10000

HEX#F10000

RGBrgb(241, 0, 0)

RGB (0–1)0.9451, 0, 0

RGB percentages94.5%, 0%, 0%

HSLhsl(0, 100%, 47.3%)

HSV / HSBhsv(0, 100%, 94.5%)

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

24-bit integer15,794,176

CSS custom property--colour: #F10000;

Brightness & contrast

Relative luminance0.18701WCAG 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 4.74:1

Contrast with white4.43:1WCAG normal text: Fail

Contrast with black4.74:1WCAG normal text: AA

Greyscale equivalent#333333

Inverted#0EFFFF

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#665900no red cones; affects about 1% of men; ΔE 83.4 from the original

Deuteranopia#9A8800no green cones; the most common form, about 1% of men; ΔE 82.2 from the original

Tritanopia#FF000Dno blue cones; rare, and affects men and women equally; ΔE 4.5 from the original

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

Contrast with white, large text4.43:1WCAG large text: AA

Contrast with black, large text4.74:1WCAG large text: AAA

Named colours

Red · ΔE 5.2 Orange red · ΔE 12.4 Tomato · ΔE 28.6 Crimson · ΔE 31.5 Firebrick · ΔE 35.7 Coral · ΔE 39.5

Nearest named CSS colourRed (#FF0000)ΔE 5.25, clearly different but related

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#00F1F1

Analogous#F10078, #F17800

Triadic#00F100, #0000F1

Split complementary#00F178, #0078F1

Tetradic#78F100, #00F1F1, #7800F1

Tints, shades & saturation

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

Lighter +40%#FFBEBE

Lighter +30%#FF8B8B

Lighter +20%#FF5858

Lighter +10%#FF2525

Darker −10%#BE0000

Darker −20%#8B0000

Darker −30%#580000

Darker −40%#250000

More saturated +25%#F10000

Less saturated −25%#D31E1E

Channel breakdown

R241

Red241 (94.5%)

Green0 (0%)

Blue0 (0%)

Hue0°

Saturation (HSL)100%

Lightness47.25%

Dominant channelRed

Hex per channelR F1 · G 00 · B 00

Keep nerding

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#F10000

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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