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Recognised as Colour

#2A397D

  • #2A397D
  • Blue
  • Dark
  • Nearest: Dark slateblue

#2A397D is a blue with RGB values 42, 57, 125 and HSL 229°, 50%, 33%. It is a dark colour, so white text on it reaches 10.6:1 contrast (AAA for normal text). The nearest named colour is Dark slateblue.

Colour values

#2A397D#2A397D
HEX#2A397D
RGBrgb(42, 57, 125)
RGB (0–1)0.1647, 0.2235, 0.4902
RGB percentages16.5%, 22.4%, 49%
HSLhsl(229.2, 49.7%, 32.7%)
HSV / HSBhsv(229.2, 66.4%, 49%)
CMYK66.4%, 54.4%, 0%, 51%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,767,229
CSS custom property--colour: #2A397D;

Brightness & contrast

Relative luminance0.04899WCAG 2.x, 0 is black and 1 is white
Perceived brightness64.9 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 10.61:1
Contrast with white10.61:1WCAG normal text: AAA
Contrast with black1.98:1WCAG normal text: Fail
Greyscale equivalent#3B3B3B
Inverted#D5C682

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#0E427Fno red cones; affects about 1% of men; ΔE 9.5 from the original
Deuteranopia#003B7Cno green cones; the most common form, about 1% of men; ΔE 6.7 from the original
Tritanopia#004955no blue cones; rare, and affects men and women equally; ΔE 42.7 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text10.61:1WCAG large text: AAA
Contrast with black, large text1.98:1WCAG large text: Fail

Named colours

Dark slateblue · ΔE 9.8Midnight blue · ΔE 19.9Rebecca purple · ΔE 27.1Slate blue · ΔE 31.6Royal blue · ΔE 33.9Steel blue · ΔE 34.8
Nearest named CSS colourDark slateblue (#483D8B)ΔE 9.78, clearly different but related
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#7D6E2A
Analogous#2A637D, #442A7D
Triadic#7D2A39, #397D2A
Split complementary#7D442A, #637D2A
Tetradic#7D2A63, #7D6E2A, #2A7D44

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#97A3DC
Lighter +30%#7182CF
Lighter +20%#4B60C2
Lighter +10%#374AA3
Darker −10%#1D2857
Darker −20%#101631
Darker −30%#04050A
Darker −40%#000000
More saturated +25%#152C92
Less saturated −25%#3F4668

Channel breakdown

R42
G57
B125
Red42 (16.5%)
Green57 (22.4%)
Blue125 (49%)
Hue229.16°
Saturation (HSL)49.7%
Lightness32.75%
Dominant channelBlue
Hex per channelR 2A · G 39 · B 7D

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Every value on this page was computed from “2a397d” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.