Recognised as Colour

#CF1B41

#CF1B41
Red
Dark
Nearest: Crimson

#CF1B41 is a red with RGB values 207, 27, 65 and HSL 347°, 77%, 46%. It is a dark colour, so white text on it reaches 5.4:1 contrast (AA for normal text). The nearest named colour is Crimson.

Colour values

#CF1B41#CF1B41

HEX#CF1B41

RGBrgb(207, 27, 65)

RGB (0–1)0.8118, 0.1059, 0.2549

RGB percentages81.2%, 10.6%, 25.5%

HSLhsl(347.3, 76.9%, 45.9%)

HSV / HSBhsv(347.3, 87%, 81.2%)

CMYK0%, 87%, 68.6%, 18.8%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer13,572,929

CSS custom property--colour: #CF1B41;

Brightness & contrast

Relative luminance0.14431WCAG 2.x, 0 is black and 1 is white

Perceived brightness117.1 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 5.4:1

Contrast with white5.4:1WCAG normal text: AA

Contrast with black3.89:1WCAG normal text: Fail

Greyscale equivalent#444444

Inverted#30E4BE

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#575241no red cones; affects about 1% of men; ΔE 70.6 from the original

Deuteranopia#83773Bno green cones; the most common form, about 1% of men; ΔE 71 from the original

Tritanopia#E4002Dno blue cones; rare, and affects men and women equally; ΔE 18.3 from the original

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

Contrast with white, large text5.4:1WCAG large text: AAA

Contrast with black, large text3.89:1WCAG large text: AA

Named colours

Crimson · ΔE 7.9 Firebrick · ΔE 16 Brown · ΔE 18.8 Indian red · ΔE 24.1 Dark red · ΔE 26.9 Tomato · ΔE 27.3

Nearest named CSS colourCrimson (#DC143C)ΔE 7.87, clearly different but related

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#1BCFA9

Analogous#CF1B9B, #CF4F1B

Triadic#41CF1B, #1B41CF

Split complementary#1BCF4F, #1B9BCF

Tetradic#9BCF1B, #1BCFA9, #4F1BCF

Tints, shades & saturation

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

Lighter +40%#F7BFCB

Lighter +30%#F192A6

Lighter +20%#EB6581

Lighter +10%#E5385D

Darker −10%#A21533

Darker −20%#750F25

Darker −30%#480917

Darker −40%#1B0308

More saturated +25%#EA0031

Less saturated −25%#B23852

Channel breakdown

R207

G27

B65

Red207 (81.2%)

Green27 (10.6%)

Blue65 (25.5%)

Hue347.33°

Saturation (HSL)76.92%

Lightness45.88%

Dominant channelRed

Hex per channelR CF · G 1B · B 41

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Harmonies

Lighter and darker

Similar named colours

Also reads as

CF1B41 (chemical formula)

Formula
474.219 g/mol
43 atoms

CF1B41 has a molar mass of 474.219 g/mol, made up of 43 atoms across 3 elements: 1 × C, 1 × F, 41 × B.

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Molar mass

Molar mass474.219 g/mol

Total atoms per molecule43

Distinct elements3

Mass of one molecule7.8745918 × 10^-22 g

Molecules per gram1.2699071 × 10^21

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

C2.5%

F4%

B93.5%

Carbon (C)12.011 g/mol, 2.533%

Fluorine (F)18.998 g/mol, 4.006%

Boron (B × 41)443.21 g/mol, 93.461%

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