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Recognised as Colour

#1D4488

  • #1D4488
  • Blue
  • Dark
  • Nearest: Dark slateblue

#1D4488 is a blue with RGB values 29, 68, 136 and HSL 218°, 65%, 32%. 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

#1D4488#1D4488
HEX#1D4488
RGBrgb(29, 68, 136)
RGB (0–1)0.1137, 0.2667, 0.5333
RGB percentages11.4%, 26.7%, 53.3%
HSLhsl(218.1, 64.8%, 32.4%)
HSV / HSBhsv(218.1, 78.7%, 53.3%)
CMYK78.7%, 50%, 0%, 46.7%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,918,088
CSS custom property--colour: #1D4488;

Brightness & contrast

Relative luminance0.06173WCAG 2.x, 0 is black and 1 is white
Perceived brightness71.2 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 9.4:1
Contrast with white9.4:1WCAG normal text: AAA
Contrast with black2.23:1WCAG normal text: Fail
Greyscale equivalent#414141
Inverted#E2BB77

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#1D4B8Bno red cones; affects about 1% of men; ΔE 4.6 from the original
Deuteranopia#004287no green cones; the most common form, about 1% of men; ΔE 2.5 from the original
Tritanopia#00545Fno blue cones; rare, and affects men and women equally; ΔE 41.7 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text9.4:1WCAG large text: AAA
Contrast with black, large text2.23:1WCAG large text: Fail

Named colours

Dark slateblue · ΔE 13.9Midnight blue · ΔE 25.2Steel blue · ΔE 29.5Rebecca purple · ΔE 31.3Slate blue · ΔE 32.6Royal blue · ΔE 32.7
Nearest named CSS colourDark slateblue (#483D8B)ΔE 13.94, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#88611D
Analogous#1D7988, #2C1D88
Triadic#881D44, #44881D
Split complementary#882C1D, #79881D
Tetradic#881D79, #88611D, #1D882C

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#8BACE6
Lighter +30%#618EDD
Lighter +20%#3770D4
Lighter +10%#2659B2
Darker −10%#142F5E
Darker −20%#0B1A34
Darker −30%#02050A
Darker −40%#000000
More saturated +25%#083E9D
Less saturated −25%#324A73

Channel breakdown

R29
G68
B136
Red29 (11.4%)
Green68 (26.7%)
Blue136 (53.3%)
Hue218.13°
Saturation (HSL)64.85%
Lightness32.35%
Dominant channelBlue
Hex per channelR 1D · G 44 · B 88

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Every value on this page was computed from “1d4488” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.