Recognised as Colour

#FF3D37

#FF3D37
Red
Dark
Nearest: Tomato

#FF3D37 is a red with RGB values 255, 61, 55 and HSL 2°, 100%, 61%. It is a dark colour, so black text on it reaches 6:1 contrast (AA for normal text). The nearest named colour is Tomato.

Colour values

#FF3D37#FF3D37

HEX#FF3D37

RGBrgb(255, 61, 55)

RGB (0–1)1, 0.2392, 0.2157

RGB percentages100%, 23.9%, 21.6%

HSLhsl(1.8, 100%, 60.8%)

HSV / HSBhsv(1.8, 78.4%, 100%)

CMYK0%, 76.1%, 78.4%, 0%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer16,727,351

CSS custom property--colour: #FF3D37;

Brightness & contrast

Relative luminance0.24873WCAG 2.x, 0 is black and 1 is white

Perceived brightness148.2 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundBlackcontrast 5.97:1

Contrast with white3.51:1WCAG normal text: Fail

Contrast with black5.97:1WCAG normal text: AA

Greyscale equivalent#666666

Inverted#00C2C8

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#7A6E34no red cones; affects about 1% of men; ΔE 76.8 from the original

Deuteranopia#A9982Eno green cones; the most common form, about 1% of men; ΔE 77.3 from the original

Tritanopia#FF003Eno blue cones; rare, and affects men and women equally; ΔE 12.8 from the original

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

Contrast with white, large text3.51:1WCAG large text: AA

Contrast with black, large text5.97:1WCAG large text: AAA

Named colours

Tomato · ΔE 14.6 Crimson · ΔE 18.5 Orange red · ΔE 20.1 Red · ΔE 20.5 Firebrick · ΔE 26.1 Coral · ΔE 27.8

Nearest named CSS colourTomato (#FF6347)ΔE 14.56, a distinctly different colour

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#37F9FF

Analogous#FF3795, #FFA137

Triadic#37FF3D, #3D37FF

Split complementary#37FFA1, #3795FF

Tetradic#95FF37, #37F9FF, #A137FF

Tints, shades & saturation

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

Lighter +40%#FFFFFF

Lighter +30%#FFD1D0

Lighter +20%#FFA09D

Lighter +10%#FF6E6A

Darker −10%#FF0C04

Darker −20%#D00600

Darker −30%#9D0500

Darker −40%#6A0300

More saturated +25%#FF3D37

Less saturated −25%#E65550

Channel breakdown

R255

G61

B55

Red255 (100%)

Green61 (23.9%)

Blue55 (21.6%)

Hue1.8°

Saturation (HSL)100%

Lightness60.78%

Dominant channelRed

Hex per channelR FF · G 3D · B 37

Keep nerding

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

#FF3D37

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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