Colour

#FF1523

#FF1523
Red
Dark
Nearest: Red

#FF1523 is a red with RGB values 255, 21, 35 and HSL 356°, 100%, 54%. It is a dark colour, so black text on it reaches 5.4:1 contrast (AA for normal text). The nearest named colour is Red.

Colour values

#FF1523#FF1523

HEX#FF1523

RGBrgb(255, 21, 35)

RGB (0–1)1, 0.0824, 0.1373

RGB percentages100%, 8.2%, 13.7%

HSLhsl(356.4, 100%, 54.1%)

HSV / HSBhsv(356.4, 91.8%, 100%)

CMYK0%, 91.8%, 86.3%, 0%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer16,717,091

CSS custom property--colour: #FF1523;

Brightness & contrast

Relative luminance0.21918WCAG 2.x, 0 is black and 1 is white

Perceived brightness140.9 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundBlackcontrast 5.38:1

Contrast with white3.9:1WCAG normal text: Fail

Contrast with black5.38:1WCAG normal text: AA

Greyscale equivalent#484848

Inverted#00EADC

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#6E621Fno red cones; affects about 1% of men; ΔE 85.3 from the original

Deuteranopia#A4920Fno green cones; the most common form, about 1% of men; ΔE 85 from the original

Tritanopia#FF0021no blue cones; rare, and affects men and women equally; ΔE 1.8 from the original

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

Contrast with white, large text3.9:1WCAG large text: AA

Contrast with black, large text5.38:1WCAG large text: AAA

Named colours

Red · ΔE 11 Orange red · ΔE 17.2 Tomato · ΔE 24.6 Crimson · ΔE 25 Firebrick · ΔE 33 Coral · ΔE 37.1

Nearest named CSS colourRed (#FF0000)ΔE 11.01, a distinctly different colour

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#15FFF1

Analogous#FF1598, #FF7C15

Triadic#23FF15, #1523FF

Split complementary#15FF7C, #1598FF

Tetradic#98FF15, #15FFF1, #7C15FF

Tints, shades & saturation

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

Lighter +40%#FFE1E3

Lighter +30%#FFAEB3

Lighter +20%#FF7B83

Lighter +10%#FF4853

Darker −10%#E1000D

Darker −20%#AE000A

Darker −30%#7B0007

Darker −40%#480004

More saturated +25%#FF1523

Less saturated −25%#E2323D

Channel breakdown

R255

G21

B35

Red255 (100%)

Green21 (8.2%)

Blue35 (13.7%)

Hue356.41°

Saturation (HSL)100%

Lightness54.12%

Dominant channelRed

Hex per channelR FF · G 15 · B 23

Keep nerding

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#FF1523

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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