Colour

#FF0023

#FF0023
Red
Dark
Nearest: Red

#FF0023 is a red with RGB values 255, 0, 35 and HSL 352°, 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

#FF0023#FF0023

HEX#FF0023

RGBrgb(255, 0, 35)

RGB (0–1)1, 0, 0.1373

RGB percentages100%, 0%, 13.7%

HSLhsl(351.8, 100%, 50%)

HSV / HSBhsv(351.8, 100%, 100%)

CMYK0%, 100%, 86.3%, 0%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer16,711,715

CSS custom property--colour: #FF0023;

Brightness & contrast

Relative luminance0.21381WCAG 2.x, 0 is black and 1 is white

Perceived brightness139.9 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundBlackcontrast 5.28:1

Contrast with white3.98:1WCAG normal text: Fail

Contrast with black5.28:1WCAG normal text: AA

Greyscale equivalent#393939

Inverted#00FFDC

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#6C601Fno red cones; affects about 1% of men; ΔE 86.8 from the original

Deuteranopia#A2900Eno green cones; the most common form, about 1% of men; ΔE 86.5 from the original

Tritanopia#FF0019no blue cones; rare, and affects men and women equally; ΔE 4.3 from the original

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

Contrast with white, large text3.98:1WCAG large text: AA

Contrast with black, large text5.28:1WCAG large text: AAA

Named colours

Red · ΔE 11.4 Orange red · ΔE 18.7 Crimson · ΔE 25 Tomato · ΔE 26 Firebrick · ΔE 33.7 Coral · ΔE 38.7

Nearest named CSS colourRed (#FF0000)ΔE 11.38, a distinctly different colour

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#00FFDC

Analogous#FF00A3, #FF5C00

Triadic#23FF00, #0023FF

Split complementary#00FF5C, #00A3FF

Tetradic#A3FF00, #00FFDC, #5C00FF

Tints, shades & saturation

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

Lighter +40%#FFCCD3

Lighter +30%#FF99A7

Lighter +20%#FF667B

Lighter +10%#FF334F

Darker −10%#CC001C

Darker −20%#990015

Darker −30%#66000E

Darker −40%#330007

More saturated +25%#FF0023

Less saturated −25%#DF203A

Channel breakdown

R255

B35

Red255 (100%)

Green0 (0%)

Blue35 (13.7%)

Hue351.76°

Saturation (HSL)100%

Lightness50%

Dominant channelRed

Hex per channelR FF · G 00 · B 23

Keep nerding

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#FF0023

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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