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Recognised as Colour

#1C4FB1

  • #1C4FB1
  • Blue
  • Dark
  • Nearest: Royal blue

#1C4FB1 is a blue with RGB values 28, 79, 177 and HSL 219°, 73%, 40%. It is a dark colour, so white text on it reaches 7.5:1 contrast (AAA for normal text). The nearest named colour is Royal blue.

Colour values

#1C4FB1#1C4FB1
HEX#1C4FB1
RGBrgb(28, 79, 177)
RGB (0–1)0.1098, 0.3098, 0.6941
RGB percentages11%, 31%, 69.4%
HSLhsl(219.5, 72.7%, 40.2%)
HSV / HSBhsv(219.5, 84.2%, 69.4%)
CMYK84.2%, 55.4%, 0%, 30.6%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,855,409
CSS custom property--colour: #1C4FB1;

Brightness & contrast

Relative luminance0.09013WCAG 2.x, 0 is black and 1 is white
Perceived brightness86.4 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 7.49:1
Contrast with white7.49:1WCAG normal text: AAA
Contrast with black2.8:1WCAG normal text: Fail
Greyscale equivalent#4B4B4B
Inverted#E3B04E

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#005CB4no red cones; affects about 1% of men; ΔE 10.3 from the original
Deuteranopia#004EAFno green cones; the most common form, about 1% of men; ΔE 1.9 from the original
Tritanopia#006778no blue cones; rare, and affects men and women equally; ΔE 56.5 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text7.49:1WCAG large text: AAA
Contrast with black, large text2.8:1WCAG large text: Fail

Named colours

Royal blue · ΔE 15.5Dark slateblue · ΔE 16.4Slate blue · ΔE 17.7Midnight blue · ΔE 23.9Rebecca purple · ΔE 24.1Medium purple · ΔE 25.6
Nearest named CSS colourRoyal blue (#4169E1)ΔE 15.48, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#B17E1C
Analogous#1C99B1, #341CB1
Triadic#B11C4F, #4FB11C
Split complementary#B1341C, #99B11C
Tetradic#B11C99, #B17E1C, #1CB134

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#A8C1F1
Lighter +30%#7CA2EA
Lighter +20%#5082E3
Lighter +10%#2463DC
Darker −10%#153B85
Darker −20%#0E2859
Darker −30%#07142D
Darker −40%#000001
More saturated +25%#0247CB
Less saturated −25%#365797

Channel breakdown

R28
G79
B177
Red28 (11%)
Green79 (31%)
Blue177 (69.4%)
Hue219.46°
Saturation (HSL)72.68%
Lightness40.2%
Dominant channelBlue
Hex per channelR 1C · G 4F · B B1

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Every value on this page was computed from “1c4fb1” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.