Recognised as Colour

#FF280A

#FF280A
Red
Dark
Nearest: Red

#FF280A is a red with RGB values 255, 40, 10 and HSL 7°, 100%, 52%. It is a dark colour, so black text on it reaches 5.6:1 contrast (AA for normal text). The nearest named colour is Red.

Colour values

#FF280A#FF280A

HEX#FF280A

RGBrgb(255, 40, 10)

RGB (0–1)1, 0.1569, 0.0392

RGB percentages100%, 15.7%, 3.9%

HSLhsl(7.3, 100%, 52%)

HSV / HSBhsv(7.3, 96.1%, 100%)

CMYK0%, 84.3%, 96.1%, 0%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer16,721,930

CSS custom property--colour: #FF280A;

Brightness & contrast

Relative luminance0.22799WCAG 2.x, 0 is black and 1 is white

Perceived brightness142.8 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundBlackcontrast 5.56:1

Contrast with white3.78:1WCAG normal text: Fail

Contrast with black5.56:1WCAG normal text: AA

Greyscale equivalent#545454

Inverted#00D7F5

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#746500no red cones; affects about 1% of men; ΔE 81.6 from the original

Deuteranopia#A79400no green cones; the most common form, about 1% of men; ΔE 81.5 from the original

Tritanopia#FF0027no blue cones; rare, and affects men and women equally; ΔE 12.7 from the original

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

Contrast with white, large text3.78:1WCAG large text: AA

Contrast with black, large text5.56:1WCAG large text: AAA

Named colours

Red · ΔE 5.1 Orange red · ΔE 8.9 Tomato · ΔE 27.1 Crimson · ΔE 33.2 Coral · ΔE 37.3 Firebrick · ΔE 37.6

Nearest named CSS colourRed (#FF0000)ΔE 5.12, clearly different but related

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#0AE1FF

Analogous#FF0A67, #FFA20A

Triadic#0AFF28, #280AFF

Split complementary#0AFFA3, #0A66FF

Tetradic#66FF0A, #0AE1FF, #A20AFF

Tints, shades & saturation

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

Lighter +40%#FFDBD6

Lighter +30%#FFAEA3

Lighter +20%#FF8270

Lighter +10%#FF553D

Darker −10%#D61A00

Darker −20%#A31400

Darker −30%#700E00

Darker −40%#3D0700

More saturated +25%#FF280A

Less saturated −25%#E03F29

Channel breakdown

R255

G40

B10

Red255 (100%)

Green40 (15.7%)

Blue10 (3.9%)

Hue7.35°

Saturation (HSL)100%

Lightness51.96%

Dominant channelRed

Hex per channelR FF · G 28 · B 0A

Keep nerding

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

#FF280A

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

Nerdulate something else