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Recognised as Colour

#218DC5

  • #218DC5
  • Blue
  • Dark
  • Nearest: Steel blue

#218DC5 is a blue with RGB values 33, 141, 197 and HSL 200°, 71%, 45%. It is a dark colour, so black text on it reaches 5.7:1 contrast (AA for normal text). The nearest named colour is Steel blue.

Colour values

#218DC5#218DC5
HEX#218DC5
RGBrgb(33, 141, 197)
RGB (0–1)0.1294, 0.5529, 0.7725
RGB percentages12.9%, 55.3%, 77.3%
HSLhsl(200.5, 71.3%, 45.1%)
HSV / HSBhsv(200.5, 83.2%, 77.3%)
CMYK83.2%, 28.4%, 0%, 22.7%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,198,981
CSS custom property--colour: #218DC5;

Brightness & contrast

Relative luminance0.23404WCAG 2.x, 0 is black and 1 is white
Perceived brightness128.1 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 5.68:1
Contrast with white3.7:1WCAG normal text: Fail
Contrast with black5.68:1WCAG normal text: AA
Greyscale equivalent#7A7A7A
Inverted#DE723A

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#728DC8no red cones; affects about 1% of men; ΔE 16.3 from the original
Deuteranopia#5C7EC4no green cones; the most common form, about 1% of men; ΔE 18.2 from the original
Tritanopia#009BA0no blue cones; rare, and affects men and women equally; ΔE 33.3 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text3.7:1WCAG large text: AA
Contrast with black, large text5.68:1WCAG large text: AAA

Named colours

Steel blue · ΔE 8.1Deep skyblue · ΔE 19.6Cornflower blue · ΔE 23.4Light skyblue · ΔE 25.8Light slate grey · ΔE 27.2Slate grey · ΔE 27.8
Nearest named CSS colourSteel blue (#4682B4)ΔE 8.08, clearly different but related
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#C55921
Analogous#21C5AB, #213BC5
Triadic#C5218D, #8DC521
Split complementary#C5213B, #C5AB21
Tetradic#AB21C5, #C55921, #3BC521

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#BEE2F4
Lighter +30%#92CEED
Lighter +20%#67BAE5
Lighter +10%#3BA6DE
Darker −10%#1A6E99
Darker −20%#124E6E
Darker −30%#0B2F42
Darker −40%#041016
More saturated +25%#0496E2
Less saturated −25%#3E84A8

Channel breakdown

R33
G141
B197
Red33 (12.9%)
Green141 (55.3%)
Blue197 (77.3%)
Hue200.49°
Saturation (HSL)71.3%
Lightness45.1%
Dominant channelBlue
Hex per channelR 21 · G 8D · B C5

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Every value on this page was computed from “218dc5” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.