Colour

#FF001B

#FF001B
Red
Dark
Nearest: Red

#FF001B is a red with RGB values 255, 0, 27 and HSL 354°, 100%, 50%. It is a dark colour, so black text on it reaches 5.3:1 contrast (AA for normal text). The nearest named colour is Red.

Colour values

#FF001B#FF001B

HEX#FF001B

RGBrgb(255, 0, 27)

RGB (0–1)1, 0, 0.1059

RGB percentages100%, 0%, 10.6%

HSLhsl(353.6, 100%, 50%)

HSV / HSBhsv(353.6, 100%, 100%)

CMYK0%, 100%, 89.4%, 0%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer16,711,707

CSS custom property--colour: #FF001B;

Brightness & contrast

Relative luminance0.21339WCAG 2.x, 0 is black and 1 is white

Perceived brightness139.7 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundBlackcontrast 5.27:1

Contrast with white3.99:1WCAG normal text: Fail

Contrast with black5.27:1WCAG normal text: AA

Greyscale equivalent#383838

Inverted#00FFE4

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#6C5F15no red cones; affects about 1% of men; ΔE 86.6 from the original

Deuteranopia#A39000no green cones; the most common form, about 1% of men; ΔE 86 from the original

Tritanopia#FF0016no blue cones; rare, and affects men and women equally; ΔE 1.9 from the original

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

Contrast with white, large text3.99:1WCAG large text: AA

Contrast with black, large text5.27:1WCAG large text: AAA

Named colours

Red · ΔE 7.9 Orange red · ΔE 16.4 Tomato · ΔE 27.4 Crimson · ΔE 28.1 Firebrick · ΔE 35.6 Coral · ΔE 39.5

Nearest named CSS colourRed (#FF0000)ΔE 7.92, clearly different but related

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#00FFE4

Analogous#FF009B, #FF6400

Triadic#1BFF00, #001BFF

Split complementary#00FF64, #009BFF

Tetradic#9BFF00, #00FFE4, #6400FF

Tints, shades & saturation

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

Lighter +40%#FFCCD1

Lighter +30%#FF99A4

Lighter +20%#FF6676

Lighter +10%#FF3349

Darker −10%#CC0016

Darker −20%#990010

Darker −30%#66000B

Darker −40%#330005

More saturated +25%#FF001B

Less saturated −25%#DF2034

Channel breakdown

R255

B27

Red255 (100%)

Green0 (0%)

Blue27 (10.6%)

Hue353.65°

Saturation (HSL)100%

Lightness50%

Dominant channelRed

Hex per channelR FF · G 00 · B 1B

Keep nerding

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

#FF001B

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