Colour

#FF371C

#FF371C
Red
Dark
Nearest: Orange red

#FF371C is a red with RGB values 255, 55, 28 and HSL 7°, 100%, 55%. It is a dark colour, so black text on it reaches 5.8:1 contrast (AA for normal text). The nearest named colour is Orange red.

Colour values

#FF371C#FF371C

HEX#FF371C

RGBrgb(255, 55, 28)

RGB (0–1)1, 0.2157, 0.1098

RGB percentages100%, 21.6%, 11%

HSLhsl(7.1, 100%, 55.5%)

HSV / HSBhsv(7.1, 89%, 100%)

CMYK0%, 78.4%, 89%, 0%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer16,725,788

CSS custom property--colour: #FF371C;

Brightness & contrast

Relative luminance0.24076WCAG 2.x, 0 is black and 1 is white

Perceived brightness146 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundBlackcontrast 5.82:1

Contrast with white3.61:1WCAG normal text: Fail

Contrast with black5.82:1WCAG normal text: AA

Greyscale equivalent#606060

Inverted#00C8E3

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#796B13no red cones; affects about 1% of men; ΔE 78.4 from the original

Deuteranopia#A99604no green cones; the most common form, about 1% of men; ΔE 78.3 from the original

Tritanopia#FF0034no blue cones; rare, and affects men and women equally; ΔE 16.3 from the original

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

Contrast with white, large text3.61:1WCAG large text: AA

Contrast with black, large text5.82:1WCAG large text: AAA

Named colours

Orange red · ΔE 9.3 Red · ΔE 10.5 Tomato · ΔE 21.3 Crimson · ΔE 28.8 Coral · ΔE 32 Firebrick · ΔE 33.1

Nearest named CSS colourOrange red (#FF4500)ΔE 9.32, clearly different but related

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#1CE4FF

Analogous#FF1C73, #FFA81C

Triadic#1CFF37, #371CFF

Split complementary#1CFFA8, #1C73FF

Tetradic#73FF1C, #1CE4FF, #A81CFF

Tints, shades & saturation

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

Lighter +40%#FFEBE8

Lighter +30%#FFBEB5

Lighter +20%#FF9182

Lighter +10%#FF644F

Darker −10%#E81C00

Darker −20%#B51600

Darker −30%#820F00

Darker −40%#4F0900

More saturated +25%#FF371C

Less saturated −25%#E34D38

Channel breakdown

R255

G55

B28

Red255 (100%)

Green55 (21.6%)

Blue28 (11%)

Hue7.14°

Saturation (HSL)100%

Lightness55.49%

Dominant channelRed

Hex per channelR FF · G 37 · B 1C

Keep nerding

Every link below is a page Nerdulator can generate from what it already knows about this value.

#FF371C

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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