Colour

#FF310C

#FF310C
Red
Dark
Nearest: Orange red

#FF310C is a red with RGB values 255, 49, 12 and HSL 9°, 100%, 52%. It is a dark colour, so black text on it reaches 5.7:1 contrast (AA for normal text). The nearest named colour is Orange red.

Colour values

#FF310C#FF310C

HEX#FF310C

RGBrgb(255, 49, 12)

RGB (0–1)1, 0.1922, 0.0471

RGB percentages100%, 19.2%, 4.7%

HSLhsl(9.1, 100%, 52.4%)

HSV / HSBhsv(9.1, 95.3%, 100%)

CMYK0%, 80.8%, 95.3%, 0%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer16,724,236

CSS custom property--colour: #FF310C;

Brightness & contrast

Relative luminance0.23483WCAG 2.x, 0 is black and 1 is white

Perceived brightness144.5 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundBlackcontrast 5.7:1

Contrast with white3.69:1WCAG normal text: Fail

Contrast with black5.7:1WCAG normal text: AA

Greyscale equivalent#5A5A5A

Inverted#00CEF3

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#776800no red cones; affects about 1% of men; ΔE 79.7 from the original

Deuteranopia#A89500no green cones; the most common form, about 1% of men; ΔE 79.6 from the original

Tritanopia#FF002Eno blue cones; rare, and affects men and women equally; ΔE 16.7 from the original

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

Contrast with white, large text3.69:1WCAG large text: AA

Contrast with black, large text5.7:1WCAG large text: AAA

Named colours

Orange red · ΔE 7.1 Red · ΔE 7.1 Tomato · ΔE 25.6 Crimson · ΔE 33.1 Coral · ΔE 35.4 Firebrick · ΔE 36.8

Nearest named CSS colourOrange red (#FF4500)ΔE 7.06, clearly different but related

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#0CDAFF

Analogous#FF0C60, #FFAA0C

Triadic#0CFF31, #310CFF

Split complementary#0CFFAB, #0C60FF

Tetradic#61FF0C, #0CDAFF, #AB0CFF

Tints, shades & saturation

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

Lighter +40%#FFDED8

Lighter +30%#FFB3A5

Lighter +20%#FF8772

Lighter +10%#FF5C3F

Darker −10%#D82100

Darker −20%#A51900

Darker −30%#721100

Darker −40%#3F0A00

More saturated +25%#FF310C

Less saturated −25%#E1462A

Channel breakdown

R255

G49

B12

Red255 (100%)

Green49 (19.2%)

Blue12 (4.7%)

Hue9.14°

Saturation (HSL)100%

Lightness52.35%

Dominant channelRed

Hex per channelR FF · G 31 · B 0C

Keep nerding

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

#FF310C

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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