Recognised as Colour

#FF183E

#FF183E
Red
Dark
Nearest: Crimson

#FF183E is a red with RGB values 255, 24, 62 and HSL 350°, 100%, 55%. It is a dark colour, so black text on it reaches 5.5:1 contrast (AA for normal text). The nearest named colour is Crimson.

Colour values

#FF183E#FF183E

HEX#FF183E

RGBrgb(255, 24, 62)

RGB (0–1)1, 0.0941, 0.2431

RGB percentages100%, 9.4%, 24.3%

HSLhsl(350.1, 100%, 54.7%)

HSV / HSBhsv(350.1, 90.6%, 100%)

CMYK0%, 90.6%, 75.7%, 0%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer16,717,886

CSS custom property--colour: #FF183E;

Brightness & contrast

Relative luminance0.22261WCAG 2.x, 0 is black and 1 is white

Perceived brightness142.2 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundBlackcontrast 5.45:1

Contrast with white3.85:1WCAG normal text: Fail

Contrast with black5.45:1WCAG normal text: AA

Greyscale equivalent#4C4C4C

Inverted#00E7C1

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#6D643Dno red cones; affects about 1% of men; ΔE 84.8 from the original

Deuteranopia#A39235no green cones; the most common form, about 1% of men; ΔE 84.4 from the original

Tritanopia#FF002Cno blue cones; rare, and affects men and women equally; ΔE 9.1 from the original

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

Contrast with white, large text3.85:1WCAG large text: AA

Contrast with black, large text5.45:1WCAG large text: AAA

Named colours

Crimson · ΔE 14.2 Tomato · ΔE 23 Red · ΔE 24.7 Firebrick · ΔE 28.2 Orange red · ΔE 28.9 Brown · ΔE 35.9

Nearest named CSS colourCrimson (#DC143C)ΔE 14.16, a distinctly different colour

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#18FFD9

Analogous#FF18B2, #FF6618

Triadic#3EFF18, #183EFF

Split complementary#18FF66, #18B2FF

Tetradic#B1FF18, #18FFD9, #6618FF

Tints, shades & saturation

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

Lighter +40%#FFE4E8

Lighter +30%#FFB1BE

Lighter +20%#FF7E93

Lighter +10%#FF4B69

Darker −10%#E40026

Darker −20%#B1001D

Darker −30%#7E0015

Darker −40%#4B000C

More saturated +25%#FF183E

Less saturated −25%#E23551

Channel breakdown

R255

G24

B62

Red255 (100%)

Green24 (9.4%)

Blue62 (24.3%)

Hue350.13°

Saturation (HSL)100%

Lightness54.71%

Dominant channelRed

Hex per channelR FF · G 18 · B 3E

Keep nerding

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

#FF183E

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