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Colour

#1C3B7B

  • #1C3B7B
  • Blue
  • Dark
  • Nearest: Dark slateblue

#1C3B7B is a blue with RGB values 28, 59, 123 and HSL 220°, 63%, 30%. It is a dark colour, so white text on it reaches 10.7:1 contrast (AAA for normal text). The nearest named colour is Dark slateblue.

Colour values

#1C3B7B#1C3B7B
HEX#1C3B7B
RGBrgb(28, 59, 123)
RGB (0–1)0.1098, 0.2314, 0.4824
RGB percentages11%, 23.1%, 48.2%
HSLhsl(220.4, 62.9%, 29.6%)
HSV / HSBhsv(220.4, 77.2%, 48.2%)
CMYK77.2%, 52%, 0%, 51.8%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,850,235
CSS custom property--colour: #1C3B7B;

Brightness & contrast

Relative luminance0.04805WCAG 2.x, 0 is black and 1 is white
Perceived brightness63.3 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 10.71:1
Contrast with white10.71:1WCAG normal text: AAA
Contrast with black1.96:1WCAG normal text: Fail
Greyscale equivalent#393939
Inverted#E3C484

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#14437Dno red cones; affects about 1% of men; ΔE 6.7 from the original
Deuteranopia#003A7Ano green cones; the most common form, about 1% of men; ΔE 2.8 from the original
Tritanopia#004A55no blue cones; rare, and affects men and women equally; ΔE 39.7 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text10.71:1WCAG large text: AAA
Contrast with black, large text1.96:1WCAG large text: Fail

Named colours

Dark slateblue · ΔE 14.1Midnight blue · ΔE 23.5Rebecca purple · ΔE 31.5Steel blue · ΔE 32.3Slate blue · ΔE 35Royal blue · ΔE 36
Nearest named CSS colourDark slateblue (#483D8B)ΔE 14.06, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#7B5C1C
Analogous#1C6A7B, #2D1C7B
Triadic#7B1C3B, #3B7B1C
Split complementary#7B2D1C, #6A7B1C
Tetradic#7B1C6A, #7B5C1C, #1C7B2D

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#81A1E2
Lighter +30%#5781D9
Lighter +20%#2F63CE
Lighter +10%#254FA5
Darker −10%#132751
Darker −20%#091328
Darker −30%#000000
Darker −40%#000000
More saturated +25%#09348E
Less saturated −25%#2F4268

Channel breakdown

R28
G59
B123
Red28 (11%)
Green59 (23.1%)
Blue123 (48.2%)
Hue220.42°
Saturation (HSL)62.91%
Lightness29.61%
Dominant channelBlue
Hex per channelR 1C · G 3B · B 7B

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Every value on this page was computed from “1c3b7b” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.