Recognised as Colour

#FF0900

#FF0900
Red
Dark
Nearest: Red

#FF0900 is a red with RGB values 255, 9, 0 and HSL 2°, 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

#FF0900#FF0900

HEX#FF0900

RGBrgb(255, 9, 0)

RGB (0–1)1, 0.0353, 0

RGB percentages100%, 3.5%, 0%

HSLhsl(2.1, 100%, 50%)

HSV / HSBhsv(2.1, 100%, 100%)

CMYK0%, 96.5%, 100%, 0%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer16,713,984

CSS custom property--colour: #FF0900;

Brightness & contrast

Relative luminance0.21455WCAG 2.x, 0 is black and 1 is white

Perceived brightness139.6 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundBlackcontrast 5.29:1

Contrast with white3.97:1WCAG normal text: Fail

Contrast with black5.29:1WCAG normal text: AA

Greyscale equivalent#3D3D3D

Inverted#00F6FF

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#6E6000no red cones; affects about 1% of men; ΔE 86.3 from the original

Deuteranopia#A49100no green cones; the most common form, about 1% of men; ΔE 85.2 from the original

Tritanopia#FF0013no blue cones; rare, and affects men and women equally; ΔE 5.1 from the original

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

Contrast with white, large text3.97:1WCAG large text: AA

Contrast with black, large text5.29:1WCAG large text: AAA

Named colours

Red · ΔE 0.7 Orange red · ΔE 12.5 Tomato · ΔE 31.3 Crimson · ΔE 35.3 Firebrick · ΔE 40.5 Coral · ΔE 41.8

Nearest named CSS colourRed (#FF0000)ΔE 0.65, indistinguishable to the eye

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#00F6FF

Analogous#FF0077, #FF8900

Triadic#00FF09, #0900FF

Split complementary#00FF89, #0076FF

Tetradic#76FF00, #00F6FF, #8800FF

Tints, shades & saturation

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

Lighter +40%#FFCECC

Lighter +30%#FF9D99

Lighter +20%#FF6B66

Lighter +10%#FF3A33

Darker −10%#CC0700

Darker −20%#990500

Darker −30%#660400

Darker −40%#330200

More saturated +25%#FF0900

Less saturated −25%#DF2720

Channel breakdown

R255

Red255 (100%)

Green9 (3.5%)

Blue0 (0%)

Hue2.12°

Saturation (HSL)100%

Lightness50%

Dominant channelRed

Hex per channelR FF · G 09 · B 00

Keep nerding

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

#FF0900

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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