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Recognised as Colour

#4257AE

  • #4257AE
  • Blue
  • Dark
  • Nearest: Dark slateblue

#4257AE is a blue with RGB values 66, 87, 174 and HSL 228°, 45%, 47%. It is a dark colour, so white text on it reaches 6.5:1 contrast (AA for normal text). The nearest named colour is Dark slateblue.

Colour values

#4257AE#4257AE
HEX#4257AE
RGBrgb(66, 87, 174)
RGB (0–1)0.2588, 0.3412, 0.6824
RGB percentages25.9%, 34.1%, 68.2%
HSLhsl(228.3, 45%, 47.1%)
HSV / HSBhsv(228.3, 62.1%, 68.2%)
CMYK62.1%, 50%, 0%, 31.8%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer4,347,822
CSS custom property--colour: #4257AE;

Brightness & contrast

Relative luminance0.11031WCAG 2.x, 0 is black and 1 is white
Perceived brightness95.9 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 6.55:1
Contrast with white6.55:1WCAG normal text: AA
Contrast with black3.21:1WCAG normal text: Fail
Greyscale equivalent#595959
Inverted#BDA851

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#2962B1no red cones; affects about 1% of men; ΔE 10.3 from the original
Deuteranopia#1159ACno green cones; the most common form, about 1% of men; ΔE 8.4 from the original
Tritanopia#006B7Ano blue cones; rare, and affects men and women equally; ΔE 52 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text6.55:1WCAG large text: AAA
Contrast with black, large text3.21:1WCAG large text: AA

Named colours

Dark slateblue · ΔE 12.9Royal blue · ΔE 19.3Slate blue · ΔE 19.3Medium purple · ΔE 23Rebecca purple · ΔE 24.2Cornflower blue · ΔE 24.6
Nearest named CSS colourDark slateblue (#483D8B)ΔE 12.88, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#AE9942
Analogous#428DAE, #6342AE
Triadic#AE4257, #57AE42
Split complementary#AE6342, #8DAE42
Tetradic#AE428D, #AE9942, #42AE63

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#CFD5ED
Lighter +30%#AAB4DF
Lighter +20%#8594D1
Lighter +10%#6073C3
Darker −10%#344589
Darker −20%#263264
Darker −30%#18203F
Darker −40%#0A0D1A
More saturated +25%#2445CC
Less saturated −25%#606990

Channel breakdown

R66
G87
B174
Red66 (25.9%)
Green87 (34.1%)
Blue174 (68.2%)
Hue228.33°
Saturation (HSL)45%
Lightness47.06%
Dominant channelBlue
Hex per channelR 42 · G 57 · B AE

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Every value on this page was computed from “4257ae” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.