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Recognised as Colour

#1D2458

  • #1D2458
  • Blue
  • Dark
  • Nearest: Dark slateblue

#1D2458 is a blue with RGB values 29, 36, 88 and HSL 233°, 50%, 23%. It is a dark colour, so white text on it reaches 14.5:1 contrast (AAA for normal text). The nearest named colour is Dark slateblue.

Colour values

#1D2458#1D2458
HEX#1D2458
RGBrgb(29, 36, 88)
RGB (0–1)0.1137, 0.1412, 0.3451
RGB percentages11.4%, 14.1%, 34.5%
HSLhsl(232.9, 50.4%, 22.9%)
HSV / HSBhsv(232.9, 67%, 34.5%)
CMYK67%, 59.1%, 0%, 65.5%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,909,848
CSS custom property--colour: #1D2458;

Brightness & contrast

Relative luminance0.02228WCAG 2.x, 0 is black and 1 is white
Perceived brightness43.5 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 14.53:1
Contrast with white14.53:1WCAG normal text: AAA
Contrast with black1.45:1WCAG normal text: Fail
Greyscale equivalent#262626
Inverted#E2DBA7

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#012C5Ano red cones; affects about 1% of men; ΔE 9.1 from the original
Deuteranopia#002757no green cones; the most common form, about 1% of men; ΔE 6.7 from the original
Tritanopia#00303Ano blue cones; rare, and affects men and women equally; ΔE 34.2 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text14.53:1WCAG large text: AAA
Contrast with black, large text1.45:1WCAG large text: Fail

Named colours

Dark slateblue · ΔE 20.1Midnight blue · ΔE 23.6Rebecca purple · ΔE 35Black · ΔE 39.6Steel blue · ΔE 40.8Indigo · ΔE 41.9
Nearest named CSS colourDark slateblue (#483D8B)ΔE 20.12, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#58511D
Analogous#1D4158, #341D58
Triadic#581D24, #24581D
Split complementary#58341D, #41581D
Tetradic#581D41, #58511D, #1D5834

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#717CD0
Lighter +30%#4A59C4
Lighter +20%#3643A5
Lighter +10%#2A347E
Darker −10%#101432
Darker −20%#04050B
Darker −30%#000000
Darker −40%#000000
More saturated +25%#0E1967
Less saturated −25%#2C2F49

Channel breakdown

R29
G36
B88
Red29 (11.4%)
Green36 (14.1%)
Blue88 (34.5%)
Hue232.88°
Saturation (HSL)50.43%
Lightness22.94%
Dominant channelBlue
Hex per channelR 1D · G 24 · B 58

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Every value on this page was computed from “1d2458” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.