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Colour

#153A79

  • #153A79
  • Blue
  • Dark
  • Nearest: Dark slateblue

#153A79 is a blue with RGB values 21, 58, 121 and HSL 218°, 70%, 28%. It is a dark colour, so white text on it reaches 11:1 contrast (AAA for normal text). The nearest named colour is Dark slateblue.

Colour values

#153A79#153A79
HEX#153A79
RGBrgb(21, 58, 121)
RGB (0–1)0.0824, 0.2275, 0.4745
RGB percentages8.2%, 22.7%, 47.5%
HSLhsl(217.8, 70.4%, 27.8%)
HSV / HSBhsv(217.8, 82.6%, 47.5%)
CMYK82.6%, 52.1%, 0%, 52.5%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,391,225
CSS custom property--colour: #153A79;

Brightness & contrast

Relative luminance0.04566WCAG 2.x, 0 is black and 1 is white
Perceived brightness61.4 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 10.98:1
Contrast with white10.98:1WCAG normal text: AAA
Contrast with black1.91:1WCAG normal text: Fail
Greyscale equivalent#373737
Inverted#EAC586

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#13417Bno red cones; affects about 1% of men; ΔE 5.4 from the original
Deuteranopia#003878no green cones; the most common form, about 1% of men; ΔE 1.9 from the original
Tritanopia#004953no blue cones; rare, and affects men and women equally; ΔE 39.5 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text10.98:1WCAG large text: AAA
Contrast with black, large text1.91:1WCAG large text: Fail

Named colours

Dark slateblue · ΔE 15.2Midnight blue · ΔE 24.1Steel blue · ΔE 32.3Rebecca purple · ΔE 32.6Slate blue · ΔE 36.1Royal blue · ΔE 36.9
Nearest named CSS colourDark slateblue (#483D8B)ΔE 15.25, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#795415
Analogous#156C79, #221579
Triadic#79153A, #3A7915
Split complementary#792215, #6C7915
Tetradic#79156C, #795415, #157922

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#739EE7
Lighter +30%#4880DF
Lighter +20%#2464D0
Lighter +10%#1D4FA4
Darker −10%#0D254E
Darker −20%#061022
Darker −30%#000000
Darker −40%#000000
More saturated +25%#03358B
Less saturated −25%#273F67

Channel breakdown

R21
G58
B121
Red21 (8.2%)
Green58 (22.7%)
Blue121 (47.5%)
Hue217.8°
Saturation (HSL)70.42%
Lightness27.84%
Dominant channelBlue
Hex per channelR 15 · G 3A · B 79

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Every value on this page was computed from “153a79” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.