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Recognised as Colour

#283A91

  • #283A91
  • Blue
  • Dark
  • Nearest: Dark slateblue

#283A91 is a blue with RGB values 40, 58, 145 and HSL 230°, 57%, 36%. It is a dark colour, so white text on it reaches 10:1 contrast (AAA for normal text). The nearest named colour is Dark slateblue.

Colour values

#283A91#283A91
HEX#283A91
RGBrgb(40, 58, 145)
RGB (0–1)0.1569, 0.2275, 0.5686
RGB percentages15.7%, 22.7%, 56.9%
HSLhsl(229.7, 56.8%, 36.3%)
HSV / HSBhsv(229.7, 72.4%, 56.9%)
CMYK72.4%, 60%, 0%, 43.1%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,636,433
CSS custom property--colour: #283A91;

Brightness & contrast

Relative luminance0.05522WCAG 2.x, 0 is black and 1 is white
Perceived brightness69.6 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 9.98:1
Contrast with white9.98:1WCAG normal text: AAA
Contrast with black2.1:1WCAG normal text: Fail
Greyscale equivalent#3C3C3C
Inverted#D7C56E

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#004794no red cones; affects about 1% of men; ΔE 11.8 from the original
Deuteranopia#003E8Fno green cones; the most common form, about 1% of men; ΔE 7.1 from the original
Tritanopia#00505Fno blue cones; rare, and affects men and women equally; ΔE 52.9 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text9.98:1WCAG large text: AAA
Contrast with black, large text2.1:1WCAG large text: Fail

Named colours

Dark slateblue · ΔE 8.8Midnight blue · ΔE 14.5Rebecca purple · ΔE 19.7Slate blue · ΔE 22.3Royal blue · ΔE 24.9Indigo · ΔE 28.9
Nearest named CSS colourDark slateblue (#483D8B)ΔE 8.77, clearly different but related
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#917F28
Analogous#286E91, #4B2891
Triadic#91283A, #3A9128
Split complementary#914B28, #6E9128
Tetradic#91286E, #917F28, #28914B

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#A0ACE5
Lighter +30%#7889DA
Lighter +20%#5066CF
Lighter +10%#334AB9
Darker −10%#1D2A69
Darker −20%#121A41
Darker −30%#070A19
Darker −40%#000000
More saturated +25%#112BA8
Less saturated −25%#3F497A

Channel breakdown

R40
G58
B145
Red40 (15.7%)
Green58 (22.7%)
Blue145 (56.9%)
Hue229.71°
Saturation (HSL)56.76%
Lightness36.27%
Dominant channelBlue
Hex per channelR 28 · G 3A · B 91

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Every value on this page was computed from “283a91” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.