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Colour

#1D397A

  • #1D397A
  • Blue
  • Dark
  • Nearest: Dark slateblue

#1D397A is a blue with RGB values 29, 57, 122 and HSL 222°, 62%, 30%. It is a dark colour, so white text on it reaches 10.9:1 contrast (AAA for normal text). The nearest named colour is Dark slateblue.

Colour values

#1D397A#1D397A
HEX#1D397A
RGBrgb(29, 57, 122)
RGB (0–1)0.1137, 0.2235, 0.4784
RGB percentages11.4%, 22.4%, 47.8%
HSLhsl(221.9, 61.6%, 29.6%)
HSV / HSBhsv(221.9, 76.2%, 47.8%)
CMYK76.2%, 53.3%, 0%, 52.2%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,915,258
CSS custom property--colour: #1D397A;

Brightness & contrast

Relative luminance0.04593WCAG 2.x, 0 is black and 1 is white
Perceived brightness62.1 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 10.95:1
Contrast with white10.95:1WCAG normal text: AAA
Contrast with black1.92:1WCAG normal text: Fail
Greyscale equivalent#383838
Inverted#E2C685

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#10417Cno red cones; affects about 1% of men; ΔE 7 from the original
Deuteranopia#003879no green cones; the most common form, about 1% of men; ΔE 3 from the original
Tritanopia#004953no blue cones; rare, and affects men and women equally; ΔE 41.4 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text10.95:1WCAG large text: AAA
Contrast with black, large text1.92:1WCAG large text: Fail

Named colours

Dark slateblue · ΔE 13.2Midnight blue · ΔE 22.2Rebecca purple · ΔE 30.5Steel blue · ΔE 33.5Slate blue · ΔE 34.4Royal blue · ΔE 35.7
Nearest named CSS colourDark slateblue (#483D8B)ΔE 13.18, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#7A5E1D
Analogous#1D677A, #301D7A
Triadic#7A1D39, #397A1D
Split complementary#7A301D, #687A1D
Tetradic#7A1D67, #7A5E1D, #1D7A2F

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#829FE1
Lighter +30%#597FD7
Lighter +20%#3160CC
Lighter +10%#274CA3
Darker −10%#132651
Darker −20%#091228
Darker −30%#000000
Darker −40%#000000
More saturated +25%#0A318D
Less saturated −25%#304167

Channel breakdown

R29
G57
B122
Red29 (11.4%)
Green57 (22.4%)
Blue122 (47.8%)
Hue221.94°
Saturation (HSL)61.59%
Lightness29.61%
Dominant channelBlue
Hex per channelR 1D · G 39 · B 7A

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Every value on this page was computed from “1d397a” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.