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Colour

#040A63

  • #040A63
  • Blue
  • Dark
  • Nearest: Midnight blue

#040A63 is a blue with RGB values 4, 10, 99 and HSL 236°, 92%, 20%. It is a dark colour, so white text on it reaches 17.1:1 contrast (AAA for normal text). The nearest named colour is Midnight blue.

Colour values

#040A63#040A63
HEX#040A63
RGBrgb(4, 10, 99)
RGB (0–1)0.0157, 0.0392, 0.3882
RGB percentages1.6%, 3.9%, 38.8%
HSLhsl(236.2, 92.2%, 20.2%)
HSV / HSBhsv(236.2, 96%, 38.8%)
CMYK96%, 89.9%, 0%, 61.2%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer264,803
CSS custom property--colour: #040A63;

Brightness & contrast

Relative luminance0.01144WCAG 2.x, 0 is black and 1 is white
Perceived brightness34.4 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 17.09:1
Contrast with white17.09:1WCAG normal text: AAA
Contrast with black1.23:1WCAG normal text: Fail
Greyscale equivalent#0F0F0F
Inverted#FBF59C

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#002165no red cones; affects about 1% of men; ΔE 17.3 from the original
Deuteranopia#001762no green cones; the most common form, about 1% of men; ΔE 10 from the original
Tritanopia#002838no blue cones; rare, and affects men and women equally; ΔE 54.8 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text17.09:1WCAG large text: AAA
Contrast with black, large text1.23:1WCAG large text: Fail

Named colours

Midnight blue · ΔE 6.3Navy · ΔE 19.6Indigo · ΔE 20.5Dark slateblue · ΔE 23.8Rebecca purple · ΔE 24.6Dark blue · ΔE 24.7
Nearest named CSS colourMidnight blue (#191970)ΔE 6.34, clearly different but related
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#635D04
Analogous#043963, #2D0463
Triadic#63040A, #0A6304
Split complementary#632E04, #3A6304
Tetradic#63043A, #635D04, #04632E

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#3C48F7
Lighter +30%#0B1AF5
Lighter +20%#0814C5
Lighter +10%#060F94
Darker −10%#020532
Darker −20%#000001
Darker −30%#000000
Darker −40%#000000
More saturated +25%#000767
Less saturated −25%#111556

Channel breakdown

R4
G10
B99
Red4 (1.6%)
Green10 (3.9%)
Blue99 (38.8%)
Hue236.21°
Saturation (HSL)92.23%
Lightness20.2%
Dominant channelBlue
Hex per channelR 04 · G 0A · B 63

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Every value on this page was computed from “040a63” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.