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Recognised as Colour

#1C33AB

  • #1C33AB
  • Blue
  • Dark
  • Nearest: Navy

#1C33AB is a blue with RGB values 28, 51, 171 and HSL 230°, 72%, 39%. It is a dark colour, so white text on it reaches 9.9:1 contrast (AAA for normal text). The nearest named colour is Navy.

Colour values

#1C33AB#1C33AB
HEX#1C33AB
RGBrgb(28, 51, 171)
RGB (0–1)0.1098, 0.2, 0.6706
RGB percentages11%, 20%, 67.1%
HSLhsl(230.3, 71.9%, 39%)
HSV / HSBhsv(230.3, 83.6%, 67.1%)
CMYK83.6%, 70.2%, 0%, 32.9%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,848,235
CSS custom property--colour: #1C33AB;

Brightness & contrast

Relative luminance0.05555WCAG 2.x, 0 is black and 1 is white
Perceived brightness71.4 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 9.95:1
Contrast with white9.95:1WCAG normal text: AAA
Contrast with black2.11:1WCAG normal text: Fail
Greyscale equivalent#373737
Inverted#E3CC54

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#004AAFno red cones; affects about 1% of men; ΔE 17.6 from the original
Deuteranopia#003CA9no green cones; the most common form, about 1% of men; ΔE 8.8 from the original
Tritanopia#00556Bno blue cones; rare, and affects men and women equally; ΔE 69.3 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text9.95:1WCAG large text: AAA
Contrast with black, large text2.11:1WCAG large text: Fail

Named colours

Navy · ΔE 18.5Slate blue · ΔE 18.9Dark blue · ΔE 19.1Rebecca purple · ΔE 20.1Indigo · ΔE 20.7Midnight blue · ΔE 21.2
Nearest named CSS colourNavy (#000080)ΔE 18.46, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#AB941C
Analogous#1C7AAB, #4C1CAB
Triadic#AB1C33, #33AB1C
Split complementary#AB4C1C, #7AAB1C
Tetradic#AB1C7A, #AB941C, #1CAB4C

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#A3AFF0
Lighter +30%#7789E9
Lighter +20%#4B64E2
Lighter +10%#2340D7
Darker −10%#15267F
Darker −20%#0E1953
Darker −30%#060C28
Darker −40%#000000
More saturated +25%#0322C4
Less saturated −25%#354492

Channel breakdown

R28
G51
B171
Red28 (11%)
Green51 (20%)
Blue171 (67.1%)
Hue230.35°
Saturation (HSL)71.86%
Lightness39.02%
Dominant channelBlue
Hex per channelR 1C · G 33 · B AB

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Every value on this page was computed from “1c33ab” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.