Colour

#FF663A

#FF663A
Red
Dark
Nearest: Tomato

#FF663A is a red with RGB values 255, 102, 58 and HSL 13°, 100%, 61%. It is a dark colour, so black text on it reaches 7.2:1 contrast (AAA for normal text). The nearest named colour is Tomato.

Colour values

#FF663A#FF663A

HEX#FF663A

RGBrgb(255, 102, 58)

RGB (0–1)1, 0.4, 0.2275

RGB percentages100%, 40%, 22.7%

HSLhsl(13.4, 100%, 61.4%)

HSV / HSBhsv(13.4, 77.3%, 100%)

CMYK0%, 60%, 77.3%, 0%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer16,737,850

CSS custom property--colour: #FF663A;

Brightness & contrast

Relative luminance0.31068WCAG 2.x, 0 is black and 1 is white

Perceived brightness161 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundBlackcontrast 7.21:1

Contrast with white2.91:1WCAG normal text: Fail

Contrast with black7.21:1WCAG normal text: AAA

Greyscale equivalent#838383

Inverted#0099C5

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#918234no red cones; affects about 1% of men; ΔE 61.6 from the original

Deuteranopia#B7A434no green cones; the most common form, about 1% of men; ΔE 62 from the original

Tritanopia#FF405Dno blue cones; rare, and affects men and women equally; ΔE 29.5 from the original

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

Contrast with white, large text2.91:1WCAG large text: Fail

Contrast with black, large text7.21:1WCAG large text: AAA

Named colours

Tomato · ΔE 7.2 Coral · ΔE 13.1 Orange red · ΔE 20.2 Chocolate · ΔE 20.4 Salmon · ΔE 27 Firebrick · ΔE 28.2

Nearest named CSS colourTomato (#FF6347)ΔE 7.17, clearly different but related

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#3AD3FF

Analogous#FF3A70, #FFC93A

Triadic#3AFF66, #663AFF

Split complementary#3AFFC8, #3A71FF

Tetradic#71FF3A, #3AD3FF, #C83AFF

Tints, shades & saturation

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

Lighter +40%#FFFFFF

Lighter +30%#FFDDD3

Lighter +20%#FFB5A0

Lighter +10%#FF8E6D

Darker −10%#FF3E07

Darker −20%#D32F00

Darker −30%#A02400

Darker −40%#6D1800

More saturated +25%#FF663A

Less saturated −25%#E67453

Channel breakdown

R255

G102

B58

Red255 (100%)

Green102 (40%)

Blue58 (22.7%)

Hue13.4°

Saturation (HSL)100%

Lightness61.37%

Dominant channelRed

Hex per channelR FF · G 66 · B 3A

Keep nerding

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

#FF663A

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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