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Colour

#1B2D75

  • #1B2D75
  • Blue
  • Dark
  • Nearest: Dark slateblue

#1B2D75 is a blue with RGB values 27, 45, 117 and HSL 228°, 63%, 28%. It is a dark colour, so white text on it reaches 12.5:1 contrast (AAA for normal text). The nearest named colour is Dark slateblue.

Colour values

#1B2D75#1B2D75
HEX#1B2D75
RGBrgb(27, 45, 117)
RGB (0–1)0.1059, 0.1765, 0.4588
RGB percentages10.6%, 17.6%, 45.9%
HSLhsl(228, 62.5%, 28.2%)
HSV / HSBhsv(228, 76.9%, 45.9%)
CMYK76.9%, 61.5%, 0%, 54.1%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,781,109
CSS custom property--colour: #1B2D75;

Brightness & contrast

Relative luminance0.03394WCAG 2.x, 0 is black and 1 is white
Perceived brightness54.5 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 12.51:1
Contrast with white12.51:1WCAG normal text: AAA
Contrast with black1.68:1WCAG normal text: Fail
Greyscale equivalent#2E2E2E
Inverted#E4D28A

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#003877no red cones; affects about 1% of men; ΔE 10.3 from the original
Deuteranopia#003074no green cones; the most common form, about 1% of men; ΔE 5 from the original
Tritanopia#003F4Cno blue cones; rare, and affects men and women equally; ΔE 44.9 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text12.51:1WCAG large text: AAA
Contrast with black, large text1.68:1WCAG large text: Fail

Named colours

Dark slateblue · ΔE 11Midnight blue · ΔE 14.1Rebecca purple · ΔE 25.5Slate blue · ΔE 31.9Indigo · ΔE 32.9Royal blue · ΔE 34.7
Nearest named CSS colourDark slateblue (#483D8B)ΔE 10.98, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#75631B
Analogous#1B5A75, #361B75
Triadic#751B2D, #2D751B
Split complementary#75361B, #5A751B
Tetradic#751B5A, #75631B, #1B7536

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#7B90E1
Lighter +30%#526DD7
Lighter +20%#2E4DC8
Lighter +10%#253D9E
Darker −10%#111D4C
Darker −20%#080D22
Darker −30%#000000
Darker −40%#000000
More saturated +25%#092287
Less saturated −25%#2D3863

Channel breakdown

R27
G45
B117
Red27 (10.6%)
Green45 (17.6%)
Blue117 (45.9%)
Hue228°
Saturation (HSL)62.5%
Lightness28.24%
Dominant channelBlue
Hex per channelR 1B · G 2D · B 75

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Every value on this page was computed from “1b2d75” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.