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Recognised as Colour

#1D358E

  • #1D358E
  • Blue
  • Dark
  • Nearest: Dark slateblue

#1D358E is a blue with RGB values 29, 53, 142 and HSL 227°, 66%, 34%. It is a dark colour, so white text on it reaches 10.8:1 contrast (AAA for normal text). The nearest named colour is Dark slateblue.

Colour values

#1D358E#1D358E
HEX#1D358E
RGBrgb(29, 53, 142)
RGB (0–1)0.1137, 0.2078, 0.5569
RGB percentages11.4%, 20.8%, 55.7%
HSLhsl(227.3, 66.1%, 33.5%)
HSV / HSBhsv(227.3, 79.6%, 55.7%)
CMYK79.6%, 62.7%, 0%, 44.3%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,914,254
CSS custom property--colour: #1D358E;

Brightness & contrast

Relative luminance0.0476WCAG 2.x, 0 is black and 1 is white
Perceived brightness64.8 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 10.76:1
Contrast with white10.76:1WCAG normal text: AAA
Contrast with black1.95:1WCAG normal text: Fail
Greyscale equivalent#363636
Inverted#E2CA71

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#004391no red cones; affects about 1% of men; ΔE 11.8 from the original
Deuteranopia#00388Cno green cones; the most common form, about 1% of men; ΔE 5.1 from the original
Tritanopia#004C5Cno blue cones; rare, and affects men and women equally; ΔE 53.6 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text10.76:1WCAG large text: AAA
Contrast with black, large text1.95:1WCAG large text: Fail

Named colours

Dark slateblue · ΔE 10.9Midnight blue · ΔE 12.4Rebecca purple · ΔE 19.8Slate blue · ΔE 23Royal blue · ΔE 25.6Indigo · ΔE 27.4
Nearest named CSS colourDark slateblue (#483D8B)ΔE 10.93, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#8E761D
Analogous#1D6D8E, #3E1D8E
Triadic#8E1D35, #358E1D
Split complementary#8E3E1D, #6E8E1D
Tetradic#8E1D6D, #8E761D, #1D8E3E

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#8FA2E8
Lighter +30%#657FDF
Lighter +20%#3A5BD7
Lighter +10%#2645B8
Darker −10%#142564
Darker −20%#0C1539
Darker −30%#03060F
Darker −40%#000000
More saturated +25%#0829A3
Less saturated −25%#324179

Channel breakdown

R29
G53
B142
Red29 (11.4%)
Green53 (20.8%)
Blue142 (55.7%)
Hue227.26°
Saturation (HSL)66.08%
Lightness33.53%
Dominant channelBlue
Hex per channelR 1D · G 35 · B 8E

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Every value on this page was computed from “1d358e” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.