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Colour

#153C8C

  • #153C8C
  • Blue
  • Dark
  • Nearest: Dark slateblue

#153C8C is a blue with RGB values 21, 60, 140 and HSL 220°, 74%, 32%. It is a dark colour, so white text on it reaches 10.2:1 contrast (AAA for normal text). The nearest named colour is Dark slateblue.

Colour values

#153C8C#153C8C
HEX#153C8C
RGBrgb(21, 60, 140)
RGB (0–1)0.0824, 0.2353, 0.549
RGB percentages8.2%, 23.5%, 54.9%
HSLhsl(220.3, 73.9%, 31.6%)
HSV / HSBhsv(220.3, 85%, 54.9%)
CMYK85%, 57.1%, 0%, 45.1%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,391,756
CSS custom property--colour: #153C8C;

Brightness & contrast

Relative luminance0.05285WCAG 2.x, 0 is black and 1 is white
Perceived brightness66.9 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 10.21:1
Contrast with white10.21:1WCAG normal text: AAA
Contrast with black2.06:1WCAG normal text: Fail
Greyscale equivalent#393939
Inverted#EAC373

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#00478Fno red cones; affects about 1% of men; ΔE 8.9 from the original
Deuteranopia#003C8Ano green cones; the most common form, about 1% of men; ΔE 2.3 from the original
Tritanopia#00505Eno blue cones; rare, and affects men and women equally; ΔE 48.2 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text10.21:1WCAG large text: AAA
Contrast with black, large text2.06:1WCAG large text: Fail

Named colours

Dark slateblue · ΔE 10.3Midnight blue · ΔE 17.7Rebecca purple · ΔE 25Slate blue · ΔE 26.8Royal blue · ΔE 27.6Medium purple · ΔE 33.1
Nearest named CSS colourDark slateblue (#483D8B)ΔE 10.27, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#8C6515
Analogous#15788C, #29158C
Triadic#8C153C, #3C8C15
Split complementary#8C2915, #788C15
Tetradic#8C1578, #8C6515, #158C29

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#81A4EC
Lighter +30%#5584E5
Lighter +20%#2864DF
Lighter +10%#1C4FB8
Darker −10%#0E2960
Darker −20%#081633
Darker −30%#010307
Darker −40%#000000
More saturated +25%#0135A0
Less saturated −25%#294378

Channel breakdown

R21
G60
B140
Red21 (8.2%)
Green60 (23.5%)
Blue140 (54.9%)
Hue220.34°
Saturation (HSL)73.91%
Lightness31.57%
Dominant channelBlue
Hex per channelR 15 · G 3C · B 8C

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Every value on this page was computed from “153c8c” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.