Recognised as Colour

#CD3827

#CD3827
Red
Dark
Nearest: Firebrick

#CD3827 is a red with RGB values 205, 56, 39 and HSL 6°, 68%, 48%. It is a dark colour, so white text on it reaches 5:1 contrast (AA for normal text). The nearest named colour is Firebrick.

Colour values

#CD3827#CD3827

HEX#CD3827

RGBrgb(205, 56, 39)

RGB (0–1)0.8039, 0.2196, 0.1529

RGB percentages80.4%, 22%, 15.3%

HSLhsl(6.1, 68%, 47.8%)

HSV / HSBhsv(6.1, 81%, 80.4%)

CMYK0%, 72.7%, 81%, 19.6%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer13,449,255

CSS custom property--colour: #CD3827;

Brightness & contrast

Relative luminance0.15954WCAG 2.x, 0 is black and 1 is white

Perceived brightness120.7 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 5.01:1

Contrast with white5.01:1WCAG normal text: AA

Contrast with black4.19:1WCAG normal text: Fail

Greyscale equivalent#565656

Inverted#32C7D8

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#655A23no red cones; affects about 1% of men; ΔE 62.1 from the original

Deuteranopia#8A7B20no green cones; the most common form, about 1% of men; ΔE 62.2 from the original

Tritanopia#E20036no blue cones; rare, and affects men and women equally; ΔE 17.9 from the original

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

Contrast with white, large text5.01:1WCAG large text: AAA

Contrast with black, large text4.19:1WCAG large text: AA

Named colours

Firebrick · ΔE 10.4 Tomato · ΔE 15.4 Crimson · ΔE 17.4 Brown · ΔE 18.4 Dark red · ΔE 20.1 Coral · ΔE 23.8

Nearest named CSS colourFirebrick (#B22222)ΔE 10.42, a distinctly different colour

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#27BCCD

Analogous#CD2769, #CD8B27

Triadic#27CD38, #3827CD

Split complementary#27CD8B, #2769CD

Tetradic#69CD27, #27BCCD, #8B27CD

Tints, shades & saturation

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

Lighter +40%#F5CFCB

Lighter +30%#EDA8A0

Lighter +20%#E58175

Lighter +10%#DD594A

Darker −10%#A22C1F

Darker −20%#772117

Darker −30%#4C150F

Darker −40%#220906

More saturated +25%#EC2008

Less saturated −25%#AF5046

Channel breakdown

R205

G56

B39

Red205 (80.4%)

Green56 (22%)

Blue39 (15.3%)

Hue6.14°

Saturation (HSL)68.03%

Lightness47.84%

Dominant channelRed

Hex per channelR CD · G 38 · B 27

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Harmonies

Lighter and darker

Similar named colours

Also reads as

Cd3827 (chemical formula)

Formula
430,193.07 g/mol
3827 atoms

Cd3827 has a molar mass of 430,193.07 g/mol, made up of 3827 atoms across 1 element: 3827 × Cd.

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Molar mass

Molar mass430,193.07 g/mol

Total atoms per molecule3827

Distinct elements1

Mass of one molecule7.143524 × 10^-19 g

Molecules per gram1.3998693 × 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 × 3827)430,193.07 g/mol, 100%

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Elements in this formula

Cadmium

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