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Recognised as Colour

#213B68

  • #213B68
  • Blue
  • Dark
  • Nearest: Dark slateblue

#213B68 is a blue with RGB values 33, 59, 104 and HSL 218°, 52%, 27%. It is a dark colour, so white text on it reaches 11.1:1 contrast (AAA for normal text). The nearest named colour is Dark slateblue.

Colour values

#213B68#213B68
HEX#213B68
RGBrgb(33, 59, 104)
RGB (0–1)0.1294, 0.2314, 0.4078
RGB percentages12.9%, 23.1%, 40.8%
HSLhsl(218, 51.8%, 26.9%)
HSV / HSBhsv(218, 68.3%, 40.8%)
CMYK68.3%, 43.3%, 0%, 59.2%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,177,896
CSS custom property--colour: #213B68;

Brightness & contrast

Relative luminance0.04451WCAG 2.x, 0 is black and 1 is white
Perceived brightness60 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 11.11:1
Contrast with white11.11:1WCAG normal text: AAA
Contrast with black1.89:1WCAG normal text: Fail
Greyscale equivalent#393939
Inverted#DEC497

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#273F6Ano red cones; affects about 1% of men; ΔE 2.3 from the original
Deuteranopia#1C3967no green cones; the most common form, about 1% of men; ΔE 1.3 from the original
Tritanopia#00454Cno blue cones; rare, and affects men and women equally; ΔE 29.8 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text11.11:1WCAG large text: AAA
Contrast with black, large text1.89:1WCAG large text: Fail

Named colours

Dark slateblue · ΔE 24.3Steel blue · ΔE 29.4Dark slate grey · ΔE 31.9Midnight blue · ΔE 33.8Slate grey · ΔE 34.5Dim grey · ΔE 35.7
Nearest named CSS colourDark slateblue (#483D8B)ΔE 24.27, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#684E21
Analogous#215F68, #2A2168
Triadic#68213B, #3B6821
Split complementary#682A21, #5F6821
Tetradic#68215F, #684E21, #21682A

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#7F9FD6
Lighter +30%#5882CA
Lighter +20%#3A67B5
Lighter +10%#2D518F
Darker −10%#152541
Darker −20%#080F1B
Darker −30%#000000
Darker −40%#000000
More saturated +25%#103679
Less saturated −25%#324057

Channel breakdown

R33
G59
B104
Red33 (12.9%)
Green59 (23.1%)
Blue104 (40.8%)
Hue218.03°
Saturation (HSL)51.82%
Lightness26.86%
Dominant channelBlue
Hex per channelR 21 · G 3B · B 68

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Every value on this page was computed from “213b68” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.