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Recognised as Colour

#153B6F

  • #153B6F
  • Blue
  • Dark
  • Nearest: Dark slateblue

#153B6F is a blue with RGB values 21, 59, 111 and HSL 215°, 68%, 26%. 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

#153B6F#153B6F
HEX#153B6F
RGBrgb(21, 59, 111)
RGB (0–1)0.0824, 0.2314, 0.4353
RGB percentages8.2%, 23.1%, 43.5%
HSLhsl(214.7, 68.2%, 25.9%)
HSV / HSBhsv(214.7, 81.1%, 43.5%)
CMYK81.1%, 46.8%, 0%, 56.5%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,391,471
CSS custom property--colour: #153B6F;

Brightness & contrast

Relative luminance0.04435WCAG 2.x, 0 is black and 1 is white
Perceived brightness59.8 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 11.13:1
Contrast with white11.13:1WCAG normal text: AAA
Contrast with black1.89:1WCAG normal text: Fail
Greyscale equivalent#373737
Inverted#EAC490

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#204071no red cones; affects about 1% of men; ΔE 3.2 from the original
Deuteranopia#0D386Eno green cones; the most common form, about 1% of men; ΔE 2 from the original
Tritanopia#00474Fno blue cones; rare, and affects men and women equally; ΔE 33.2 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text11.13:1WCAG large text: AAA
Contrast with black, large text1.89:1WCAG large text: Fail

Named colours

Dark slateblue · ΔE 21.4Steel blue · ΔE 29.6Midnight blue · ΔE 30.6Dark slate grey · ΔE 36.1Slate grey · ΔE 37.5Rebecca purple · ΔE 39
Nearest named CSS colourDark slateblue (#483D8B)ΔE 21.43, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#6F4915
Analogous#15686F, #1C156F
Triadic#6F153B, #3B6F15
Split complementary#6F1C15, #686F15
Tetradic#6F1568, #6F4915, #156F1C

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#6D9FE3
Lighter +30%#4283DB
Lighter +20%#2569C5
Lighter +10%#1D529A
Darker −10%#0D2444
Darker −20%#050D19
Darker −30%#000000
Darker −40%#000000
More saturated +25%#053880
Less saturated −25%#263E5F

Channel breakdown

R21
G59
B111
Red21 (8.2%)
Green59 (23.1%)
Blue111 (43.5%)
Hue214.67°
Saturation (HSL)68.18%
Lightness25.88%
Dominant channelBlue
Hex per channelR 15 · G 3B · B 6F

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Every value on this page was computed from “153b6f” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.