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Colour

#FF3F42

  • #FF3F42
  • Red
  • Dark
  • Nearest: Tomato

#FF3F42 is a red with RGB values 255, 63, 66 and HSL 359°, 100%, 62%. 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

#FF3F42#FF3F42
HEX#FF3F42
RGBrgb(255, 63, 66)
RGB (0–1)1, 0.2471, 0.2588
RGB percentages100%, 24.7%, 25.9%
HSLhsl(359.1, 100%, 62.4%)
HSV / HSBhsv(359.1, 75.3%, 100%)
CMYK0%, 75.3%, 74.1%, 0%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer16,727,874
CSS custom property--colour: #FF3F42;

Brightness & contrast

Relative luminance0.25208WCAG 2.x, 0 is black and 1 is white
Perceived brightness149.2 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 6.04:1
Contrast with white3.48:1WCAG normal text: Fail
Contrast with black6.04:1WCAG normal text: AA
Greyscale equivalent#686868
Inverted#00C0BD

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#7A6F40no red cones; affects about 1% of men; ΔE 76.1 from the original
Deuteranopia#A9983Bno green cones; the most common form, about 1% of men; ΔE 76.3 from the original
Tritanopia#FF0043no blue cones; rare, and affects men and women equally; ΔE 11.9 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text3.48:1WCAG large text: AA
Contrast with black, large text6.04:1WCAG large text: AAA

Named colours

Tomato · ΔE 14.2Crimson · ΔE 14.3Firebrick · ΔE 24.3Orange red · ΔE 25.5Red · ΔE 25.6Coral · ΔE 27.7
Nearest named CSS colourTomato (#FF6347)ΔE 14.25, a distinctly different colour
Hue familyred
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#3FFFFC
Analogous#FF3FA2, #FF9C3F
Triadic#42FF3F, #3F42FF
Split complementary#3FFF9C, #3FA2FF
Tetradic#A2FF3F, #3FFFFC, #9C3FFF

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#FFFFFF
Lighter +30%#FFD8D9
Lighter +20%#FFA5A6
Lighter +10%#FF7274
Darker −10%#FF0C10
Darker −20%#D80003
Darker −30%#A50003
Darker −40%#720002
More saturated +25%#FF3F42
Less saturated −25%#E75759

Channel breakdown

R255
G63
B66
Red255 (100%)
Green63 (24.7%)
Blue66 (25.9%)
Hue359.06°
Saturation (HSL)100%
Lightness62.35%
Dominant channelRed
Hex per channelR FF · G 3F · B 42

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Every value on this page was computed from “ff3f42” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.