Recognised as Colour

#CB0309

#CB0309
Red
Dark
Nearest: Firebrick

#CB0309 is a red with RGB values 203, 3, 9 and HSL 358°, 97%, 40%. It is a dark colour, so white text on it reaches 5.9:1 contrast (AA for normal text). The nearest named colour is Firebrick.

Colour values

#CB0309#CB0309

HEX#CB0309

RGBrgb(203, 3, 9)

RGB (0–1)0.7961, 0.0118, 0.0353

RGB percentages79.6%, 1.2%, 3.5%

HSLhsl(358.2, 97.1%, 40.4%)

HSV / HSBhsv(358.2, 98.5%, 79.6%)

CMYK0%, 98.5%, 95.6%, 20.4%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer13,304,585

CSS custom property--colour: #CB0309;

Brightness & contrast

Relative luminance0.12781WCAG 2.x, 0 is black and 1 is white

Perceived brightness111.1 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 5.91:1

Contrast with white5.91:1WCAG normal text: AA

Contrast with black3.56:1WCAG normal text: Fail

Greyscale equivalent#2E2E2E

Inverted#34FCF6

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#554A02no red cones; affects about 1% of men; ΔE 72.6 from the original

Deuteranopia#817200no green cones; the most common form, about 1% of men; ΔE 72.2 from the original

Tritanopia#E1000Eno blue cones; rare, and affects men and women equally; ΔE 8.1 from the original

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

Contrast with white, large text5.91:1WCAG large text: AAA

Contrast with black, large text3.56:1WCAG large text: AA

Named colours

Firebrick · ΔE 19.9 Crimson · ΔE 20.9 Orange red · ΔE 21.6 Red · ΔE 21.6 Tomato · ΔE 23 Dark red · ΔE 24.9

Nearest named CSS colourFirebrick (#B22222)ΔE 19.86, a distinctly different colour

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#03CBC5

Analogous#CB036D, #CB6103

Triadic#09CB03, #0309CB

Split complementary#03CB61, #036DCB

Tetradic#6DCB03, #03CBC5, #6103CB

Tints, shades & saturation

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

Lighter +40%#FE9C9F

Lighter +30%#FD6A6F

Lighter +20%#FC383E

Lighter +10%#FB060D

Darker −10%#990207

Darker −20%#660205

Darker −30%#340102

Darker −40%#020000

More saturated +25%#CE0006

Less saturated −25%#B11D21

Channel breakdown

R203

Red203 (79.6%)

Green3 (1.2%)

Blue9 (3.5%)

Hue358.2°

Saturation (HSL)97.09%

Lightness40.39%

Dominant channelRed

Hex per channelR CB · G 03 · B 09

Keep nerding

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

#CB0309

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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