Colour

#CF0000

#CF0000
Red
Dark
Nearest: Red

#CF0000 is a red with RGB values 207, 0, 0 and HSL 0°, 100%, 41%. It is a dark colour, so white text on it reaches 5.7:1 contrast (AA for normal text). The nearest named colour is Red.

Colour values

#CF0000#CF0000

HEX#CF0000

RGBrgb(207, 0, 0)

RGB (0–1)0.8118, 0, 0

RGB percentages81.2%, 0%, 0%

HSLhsl(0, 100%, 40.6%)

HSV / HSBhsv(0, 100%, 81.2%)

CMYK0%, 100%, 100%, 18.8%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer13,565,952

CSS custom property--colour: #CF0000;

Brightness & contrast

Relative luminance0.13265WCAG 2.x, 0 is black and 1 is white

Perceived brightness113.2 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 5.75:1

Contrast with white5.75:1WCAG normal text: AA

Contrast with black3.65:1WCAG normal text: Fail

Greyscale equivalent#2C2C2C

Inverted#30FFFF

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#574C00no red cones; affects about 1% of men; ΔE 74.5 from the original

Deuteranopia#847400no green cones; the most common form, about 1% of men; ΔE 73.1 from the original

Tritanopia#E5000Ano blue cones; rare, and affects men and women equally; ΔE 7.4 from the original

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

Contrast with white, large text5.75:1WCAG large text: AAA

Contrast with black, large text3.65:1WCAG large text: AA

Named colours

Red · ΔE 18.2 Orange red · ΔE 18.5 Firebrick · ΔE 23.8 Crimson · ΔE 24.3 Tomato · ΔE 24.4 Dark red · ΔE 28.1

Nearest named CSS colourRed (#FF0000)ΔE 18.24, a distinctly different colour

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#00CFCF

Analogous#CF0068, #CF6800

Triadic#00CF00, #0000CF

Split complementary#00CF68, #0068CF

Tetradic#68CF00, #00CFCF, #6800CF

Tints, shades & saturation

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

Lighter +40%#FF9C9C

Lighter +30%#FF6969

Lighter +20%#FF3636

Lighter +10%#FF0303

Darker −10%#9C0000

Darker −20%#690000

Darker −30%#360000

Darker −40%#030000

More saturated +25%#CF0000

Less saturated −25%#B51A1A

Channel breakdown

R207

Red207 (81.2%)

Green0 (0%)

Blue0 (0%)

Hue0°

Saturation (HSL)100%

Lightness40.59%

Dominant channelRed

Hex per channelR CF · G 00 · B 00

Keep nerding

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#CF0000

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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