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Recognised as Colour

#042581

  • #042581
  • Blue
  • Dark
  • Nearest: Midnight blue

#042581 is a blue with RGB values 4, 37, 129 and HSL 224°, 94%, 26%. It is a dark colour, so white text on it reaches 13.2:1 contrast (AAA for normal text). The nearest named colour is Midnight blue.

Colour values

#042581#042581
HEX#042581
RGBrgb(4, 37, 129)
RGB (0–1)0.0157, 0.1451, 0.5059
RGB percentages1.6%, 14.5%, 50.6%
HSLhsl(224.2, 94%, 26.1%)
HSV / HSBhsv(224.2, 96.9%, 50.6%)
CMYK96.9%, 71.3%, 0%, 49.4%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer271,745
CSS custom property--colour: #042581;

Brightness & contrast

Relative luminance0.02934WCAG 2.x, 0 is black and 1 is white
Perceived brightness52 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 13.23:1
Contrast with white13.23:1WCAG normal text: AAA
Contrast with black1.59:1WCAG normal text: Fail
Greyscale equivalent#252525
Inverted#FBDA7E

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#003684no red cones; affects about 1% of men; ΔE 13.5 from the original
Deuteranopia#002A7Fno green cones; the most common form, about 1% of men; ΔE 5.5 from the original
Tritanopia#003F50no blue cones; rare, and affects men and women equally; ΔE 55.8 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text13.23:1WCAG large text: AAA
Contrast with black, large text1.59:1WCAG large text: Fail

Named colours

Midnight blue · ΔE 6.5Dark slateblue · ΔE 16.5Rebecca purple · ΔE 20.3Navy · ΔE 22.4Indigo · ΔE 22.7Dark blue · ΔE 26.5
Nearest named CSS colourMidnight blue (#191970)ΔE 6.54, clearly different but related
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#816004
Analogous#046481, #210481
Triadic#810425, #258104
Split complementary#812104, #648104
Tetradic#810464, #816004, #048121

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#5782FA
Lighter +30%#265DF8
Lighter +20%#0741E4
Lighter +10%#0633B2
Darker −10%#021750
Darker −20%#01091E
Darker −30%#000000
Darker −40%#000000
More saturated +25%#002385
Less saturated −25%#152D70

Channel breakdown

R4
G37
B129
Red4 (1.6%)
Green37 (14.5%)
Blue129 (50.6%)
Hue224.16°
Saturation (HSL)93.98%
Lightness26.08%
Dominant channelBlue
Hex per channelR 04 · G 25 · B 81

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Every value on this page was computed from “hex 042581” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.