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Colour

#4251A2

  • #4251A2
  • Blue
  • Dark
  • Nearest: Dark slateblue

#4251A2 is a blue with RGB values 66, 81, 162 and HSL 231°, 42%, 45%. It is a dark colour, so white text on it reaches 7.2:1 contrast (AAA for normal text). The nearest named colour is Dark slateblue.

Colour values

#4251A2#4251A2
HEX#4251A2
RGBrgb(66, 81, 162)
RGB (0–1)0.2588, 0.3176, 0.6353
RGB percentages25.9%, 31.8%, 63.5%
HSLhsl(230.6, 42.1%, 44.7%)
HSV / HSBhsv(230.6, 59.3%, 63.5%)
CMYK59.3%, 50%, 0%, 36.5%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer4,346,274
CSS custom property--colour: #4251A2;

Brightness & contrast

Relative luminance0.09652WCAG 2.x, 0 is black and 1 is white
Perceived brightness90.3 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 7.17:1
Contrast with white7.17:1WCAG normal text: AAA
Contrast with black2.93:1WCAG normal text: Fail
Greyscale equivalent#545454
Inverted#BDAE5D

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#285CA5no red cones; affects about 1% of men; ΔE 10.8 from the original
Deuteranopia#1754A0no green cones; the most common form, about 1% of men; ΔE 9.1 from the original
Tritanopia#006372no blue cones; rare, and affects men and women equally; ΔE 48.8 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text7.17:1WCAG large text: AAA
Contrast with black, large text2.93:1WCAG large text: Fail

Named colours

Dark slateblue · ΔE 9.9Slate blue · ΔE 22Royal blue · ΔE 23.2Rebecca purple · ΔE 23.9Midnight blue · ΔE 24.9Medium purple · ΔE 25.2
Nearest named CSS colourDark slateblue (#483D8B)ΔE 9.92, clearly different but related
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#A29342
Analogous#4281A2, #6342A2
Triadic#A24251, #51A242
Split complementary#A26342, #81A242
Tetradic#A24281, #A29342, #42A263

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#C8CDE8
Lighter +30%#A3ACDA
Lighter +20%#7F8BCB
Lighter +10%#5B6ABC
Darker −10%#333F7E
Darker −20%#242D5A
Darker −30%#161B35
Darker −40%#070911
More saturated +25%#253DBF
Less saturated −25%#5F6585

Channel breakdown

R66
G81
B162
Red66 (25.9%)
Green81 (31.8%)
Blue162 (63.5%)
Hue230.63°
Saturation (HSL)42.11%
Lightness44.71%
Dominant channelBlue
Hex per channelR 42 · G 51 · B A2

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Every value on this page was computed from “4251a2” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.