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Colour

#423A90

  • #423A90
  • Blue
  • Dark
  • Nearest: Dark slateblue

#423A90 is a blue with RGB values 66, 58, 144 and HSL 246°, 43%, 40%. It is a dark colour, so white text on it reaches 9.4:1 contrast (AAA for normal text). The nearest named colour is Dark slateblue.

Colour values

#423A90#423A90
HEX#423A90
RGBrgb(66, 58, 144)
RGB (0–1)0.2588, 0.2275, 0.5647
RGB percentages25.9%, 22.7%, 56.5%
HSLhsl(245.6, 42.6%, 39.6%)
HSV / HSBhsv(245.6, 59.7%, 56.5%)
CMYK54.2%, 59.7%, 0%, 43.5%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer4,340,368
CSS custom property--colour: #423A90;

Brightness & contrast

Relative luminance0.06198WCAG 2.x, 0 is black and 1 is white
Perceived brightness75.1 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 9.38:1
Contrast with white9.38:1WCAG normal text: AAA
Contrast with black2.24:1WCAG normal text: Fail
Greyscale equivalent#424242
Inverted#BDC56F

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#004993no red cones; affects about 1% of men; ΔE 17.3 from the original
Deuteranopia#00438Eno green cones; the most common form, about 1% of men; ΔE 15.2 from the original
Tritanopia#214E5Fno blue cones; rare, and affects men and women equally; ΔE 49.7 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text9.38:1WCAG large text: AAA
Contrast with black, large text2.24:1WCAG large text: Fail

Named colours

Dark slateblue · ΔE 5.2Midnight blue · ΔE 14.8Rebecca purple · ΔE 14.9Slate blue · ΔE 20.5Royal blue · ΔE 25.9Indigo · ΔE 26.1
Nearest named CSS colourDark slateblue (#483D8B)ΔE 5.18, clearly different but related
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#88903A
Analogous#3A5D90, #6D3A90
Triadic#90423A, #3A9042
Split complementary#906D3A, #5D903A
Tetradic#903A5D, #88903A, #3A906D

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#B9B5E1
Lighter +30%#9791D2
Lighter +20%#746CC4
Lighter +10%#5349B4
Darker −10%#312B6C
Darker −20%#211D47
Darker −30%#100E23
Darker −40%#000000
More saturated +25%#2D21A9
Less saturated −25%#575377

Channel breakdown

R66
G58
B144
Red66 (25.9%)
Green58 (22.7%)
Blue144 (56.5%)
Hue245.58°
Saturation (HSL)42.57%
Lightness39.61%
Dominant channelBlue
Hex per channelR 42 · G 3A · B 90

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Every value on this page was computed from “423a90” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.