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Recognised as Colour

#213D6E

  • #213D6E
  • Blue
  • Dark
  • Nearest: Dark slateblue

#213D6E is a blue with RGB values 33, 61, 110 and HSL 218°, 54%, 28%. It is a dark colour, so white text on it reaches 10.7:1 contrast (AAA for normal text). The nearest named colour is Dark slateblue.

Colour values

#213D6E#213D6E
HEX#213D6E
RGBrgb(33, 61, 110)
RGB (0–1)0.1294, 0.2392, 0.4314
RGB percentages12.9%, 23.9%, 43.1%
HSLhsl(218.2, 53.8%, 28%)
HSV / HSBhsv(218.2, 70%, 43.1%)
CMYK70%, 44.5%, 0%, 56.9%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,178,414
CSS custom property--colour: #213D6E;

Brightness & contrast

Relative luminance0.04787WCAG 2.x, 0 is black and 1 is white
Perceived brightness62.4 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 10.73:1
Contrast with white10.73:1WCAG normal text: AAA
Contrast with black1.96:1WCAG normal text: Fail
Greyscale equivalent#3B3B3B
Inverted#DEC291

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#264270no red cones; affects about 1% of men; ΔE 3.1 from the original
Deuteranopia#1A3B6Dno green cones; the most common form, about 1% of men; ΔE 1.4 from the original
Tritanopia#004850no blue cones; rare, and affects men and women equally; ΔE 31.7 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text10.73:1WCAG large text: AAA
Contrast with black, large text1.96:1WCAG large text: Fail

Named colours

Dark slateblue · ΔE 22.1Steel blue · ΔE 28.7Midnight blue · ΔE 32.1Dark slate grey · ΔE 34.1Slate grey · ΔE 35.3Dim grey · ΔE 37.2
Nearest named CSS colourDark slateblue (#483D8B)ΔE 22.11, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#6E5221
Analogous#21636E, #2C216E
Triadic#6E213D, #3D6E21
Split complementary#6E2C21, #646E21
Tetradic#6E2163, #6E5221, #216E2B

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#82A2D9
Lighter +30%#5A84CE
Lighter +20%#3969BC
Lighter +10%#2D5395
Darker −10%#152747
Darker −20%#091120
Darker −30%#000000
Darker −40%#000000
More saturated +25%#0F3880
Less saturated −25%#33425C

Channel breakdown

R33
G61
B110
Red33 (12.9%)
Green61 (23.9%)
Blue110 (43.1%)
Hue218.18°
Saturation (HSL)53.85%
Lightness28.04%
Dominant channelBlue
Hex per channelR 21 · G 3D · B 6E

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Every value on this page was computed from “213d6e” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.