Recognised as Colour

#CD2903

#CD2903
Red
Dark
Nearest: Orange red

#CD2903 is a red with RGB values 205, 41, 3 and HSL 11°, 97%, 41%. It is a dark colour, so white text on it reaches 5.4:1 contrast (AA for normal text). The nearest named colour is Orange red.

Colour values

#CD2903#CD2903

HEX#CD2903

RGBrgb(205, 41, 3)

RGB (0–1)0.8039, 0.1608, 0.0118

RGB percentages80.4%, 16.1%, 1.2%

HSLhsl(11.3, 97.1%, 40.8%)

HSV / HSBhsv(11.3, 98.5%, 80.4%)

CMYK0%, 80%, 98.5%, 19.6%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer13,445,379

CSS custom property--colour: #CD2903;

Brightness & contrast

Relative luminance0.14572WCAG 2.x, 0 is black and 1 is white

Perceived brightness116.4 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 5.36:1

Contrast with white5.36:1WCAG normal text: AA

Contrast with black3.91:1WCAG normal text: Fail

Greyscale equivalent#494949

Inverted#32D6FC

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#605300no red cones; affects about 1% of men; ΔE 66.5 from the original

Deuteranopia#877700no green cones; the most common form, about 1% of men; ΔE 66.3 from the original

Tritanopia#E30025no blue cones; rare, and affects men and women equally; ΔE 15.8 from the original

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

Contrast with white, large text5.36:1WCAG large text: AAA

Contrast with black, large text3.91:1WCAG large text: AA

Named colours

Orange red · ΔE 18.5 Tomato · ΔE 20.5 Firebrick · ΔE 20.9 Red · ΔE 22.8 Crimson · ΔE 25.3 Dark red · ΔE 25.3

Nearest named CSS colourOrange red (#FF4500)ΔE 18.48, a distinctly different colour

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#03A7CD

Analogous#CD0342, #CD8E03

Triadic#03CD29, #2903CD

Split complementary#03CD8E, #0342CD

Tetradic#42CD03, #03A7CD, #8E03CD

Tints, shades & saturation

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

Lighter +40%#FEB09E

Lighter +30%#FD876C

Lighter +20%#FC5E3A

Lighter +10%#FB3508

Darker −10%#9B1F02

Darker −20%#681502

Darker −30%#360B01

Darker −40%#040100

More saturated +25%#D02700

Less saturated −25%#B3391D

Channel breakdown

R205

G41

Red205 (80.4%)

Green41 (16.1%)

Blue3 (1.2%)

Hue11.29°

Saturation (HSL)97.12%

Lightness40.78%

Dominant channelRed

Hex per channelR CD · G 29 · B 03

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Harmonies

Lighter and darker

Similar named colours

Also reads as

Cd2903 (chemical formula)

Formula
326,326.23 g/mol
2903 atoms

Cd2903 has a molar mass of 326,326.23 g/mol, made up of 2903 atoms across 1 element: 2903 × Cd.

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Molar mass

Molar mass326,326.23 g/mol

Total atoms per molecule2903

Distinct elements1

Mass of one molecule5.4187745 × 10^-19 g

Molecules per gram1.8454357 × 10^18

Name

NameNot in the name tablea name cannot be worked out from a formula alone: isomers share formulas, and naming depends on bonding the formula does not show

Composition by mass

Cd100%

Cadmium (Cd × 2903)326,326.23 g/mol, 100%

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Elements in this formula

Cadmium

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