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Recognised as Colour

#253F99

  • #253F99
  • Blue
  • Dark
  • Nearest: Dark slateblue

#253F99 is a blue with RGB values 37, 63, 153 and HSL 227°, 61%, 37%. It is a dark colour, so white text on it reaches 9.3:1 contrast (AAA for normal text). The nearest named colour is Dark slateblue.

Colour values

#253F99#253F99
HEX#253F99
RGBrgb(37, 63, 153)
RGB (0–1)0.1451, 0.2471, 0.6
RGB percentages14.5%, 24.7%, 60%
HSLhsl(226.6, 61.1%, 37.3%)
HSV / HSBhsv(226.6, 75.8%, 60%)
CMYK75.8%, 58.8%, 0%, 40%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,441,113
CSS custom property--colour: #253F99;

Brightness & contrast

Relative luminance0.06248WCAG 2.x, 0 is black and 1 is white
Perceived brightness73.5 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 9.33:1
Contrast with white9.33:1WCAG normal text: AAA
Contrast with black2.25:1WCAG normal text: Fail
Greyscale equivalent#404040
Inverted#DAC066

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#004C9Cno red cones; affects about 1% of men; ΔE 11.4 from the original
Deuteranopia#004297no green cones; the most common form, about 1% of men; ΔE 5.8 from the original
Tritanopia#005565no blue cones; rare, and affects men and women equally; ΔE 53.6 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text9.33:1WCAG large text: AAA
Contrast with black, large text2.25:1WCAG large text: Fail

Named colours

Dark slateblue · ΔE 10.4Midnight blue · ΔE 16.7Rebecca purple · ΔE 20.4Slate blue · ΔE 20.7Royal blue · ΔE 22.4Medium purple · ΔE 28.4
Nearest named CSS colourDark slateblue (#483D8B)ΔE 10.38, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#997F25
Analogous#257999, #452599
Triadic#99253F, #3F9925
Split complementary#994525, #799925
Tetradic#992579, #997F25, #259945

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#A2B1E8
Lighter +30%#798FDE
Lighter +20%#4F6DD5
Lighter +10%#2F50C2
Darker −10%#1B2E70
Darker −20%#111D47
Darker −30%#070C1E
Darker −40%#000000
More saturated +25%#0D32B1
Less saturated −25%#3D4C81

Channel breakdown

R37
G63
B153
Red37 (14.5%)
Green63 (24.7%)
Blue153 (60%)
Hue226.55°
Saturation (HSL)61.05%
Lightness37.25%
Dominant channelBlue
Hex per channelR 25 · G 3F · B 99

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Every value on this page was computed from “253f99” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.