Recognised as Colour

#CB1500

#CB1500
Red
Dark
Nearest: Orange red

#CB1500 is a red with RGB values 203, 21, 0 and HSL 6°, 100%, 40%. It is a dark colour, so white text on it reaches 5.8:1 contrast (AA for normal text). The nearest named colour is Orange red.

Colour values

#CB1500#CB1500

HEX#CB1500

RGBrgb(203, 21, 0)

RGB (0–1)0.7961, 0.0824, 0

RGB percentages79.6%, 8.2%, 0%

HSLhsl(6.2, 100%, 39.8%)

HSV / HSBhsv(6.2, 100%, 79.6%)

CMYK0%, 89.7%, 100%, 20.4%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer13,309,184

CSS custom property--colour: #CB1500;

Brightness & contrast

Relative luminance0.13233WCAG 2.x, 0 is black and 1 is white

Perceived brightness112.2 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 5.76:1

Contrast with white5.76:1WCAG normal text: AA

Contrast with black3.65:1WCAG normal text: Fail

Greyscale equivalent#3A3A3A

Inverted#34EAFF

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#594D00no red cones; affects about 1% of men; ΔE 70.6 from the original

Deuteranopia#837300no green cones; the most common form, about 1% of men; ΔE 69.7 from the original

Tritanopia#E10016no blue cones; rare, and affects men and women equally; ΔE 9.3 from the original

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

Contrast with white, large text5.76:1WCAG large text: AAA

Contrast with black, large text3.65:1WCAG large text: AA

Named colours

Orange red · ΔE 19 Red · ΔE 20.8 Firebrick · ΔE 21.7 Tomato · ΔE 22.9 Crimson · ΔE 24.3 Dark red · ΔE 25.8

Nearest named CSS colourOrange red (#FF4500)ΔE 19.03, a distinctly different colour

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#00B6CB

Analogous#CB0051, #CB7A00

Triadic#00CB15, #1500CB

Split complementary#00CB7B, #0050CB

Tetradic#51CB00, #00B6CB, #7B00CB

Tints, shades & saturation

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

Lighter +40%#FFA398

Lighter +30%#FF7565

Lighter +20%#FF4732

Lighter +10%#FE1A00

Darker −10%#981000

Darker −20%#650A00

Darker −30%#320500

Darker −40%#000000

More saturated +25%#CB1500

Less saturated −25%#B22919

Channel breakdown

R203

G21

Red203 (79.6%)

Green21 (8.2%)

Blue0 (0%)

Hue6.21°

Saturation (HSL)100%

Lightness39.8%

Dominant channelRed

Hex per channelR CB · G 15 · B 00

Keep nerding

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

Harmonies

Lighter and darker

Similar named colours

Also reads as

CB1500 (chemical formula)

Formula
16,227.011 g/mol
1501 atoms

CB1500 has a molar mass of 16,227.011 g/mol, made up of 1501 atoms across 2 elements: 1 × C, 1500 × B.

Open this reading on its own page →

Molar mass

Molar mass16,227.011 g/mol

Total atoms per molecule1501

Distinct elements2

Mass of one molecule2.6945586 × 10^-20 g

Molecules per gram3.711183 × 10^19

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

C0.1%

B99.9%

Carbon (C)12.011 g/mol, 0.074%

Boron (B × 1500)16,215 g/mol, 99.926%

Keep nerding

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

Elements in this formula

Nerdulate something else

Nothing in mind? Surprise me · today’s page