Nerdulator> put something in

Recognised as Colour

#040921

  • #040921
  • Blue
  • Dark
  • Nearest: Black

#040921 is a blue with RGB values 4, 9, 33 and HSL 230°, 78%, 7%. It is a dark colour, so white text on it reaches 19.7:1 contrast (AAA for normal text). The nearest named colour is Black.

Colour values

#040921#040921
HEX#040921
RGBrgb(4, 9, 33)
RGB (0–1)0.0157, 0.0353, 0.1294
RGB percentages1.6%, 3.5%, 12.9%
HSLhsl(229.7, 78.4%, 7.3%)
HSV / HSBhsv(229.7, 87.9%, 12.9%)
CMYK87.9%, 72.7%, 0%, 87.1%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer264,481
CSS custom property--colour: #040921;

Brightness & contrast

Relative luminance0.00331WCAG 2.x, 0 is black and 1 is white
Perceived brightness13.3 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 19.7:1
Contrast with white19.7:1WCAG normal text: AAA
Contrast with black1.07:1WCAG normal text: Fail
Greyscale equivalent#0A0A0A
Inverted#FBF6DE

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#000C22no red cones; affects about 1% of men; ΔE 2 from the original
Deuteranopia#000A21no green cones; the most common form, about 1% of men; ΔE 1.4 from the original
Tritanopia#000F13no blue cones; rare, and affects men and women equally; ΔE 13.8 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text19.7:1WCAG large text: AAA
Contrast with black, large text1.07:1WCAG large text: Fail

Named colours

Black · ΔE 15.9Dark slate grey · ΔE 34.4Dim grey · ΔE 44.3Dark slateblue · ΔE 44.5Midnight blue · ΔE 45.9Slate grey · ΔE 50.5
Nearest named CSS colourBlack (#000000)ΔE 15.91, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#211C04
Analogous#041821, #0D0421
Triadic#210409, #092104
Split complementary#210D04, #182104
Tetradic#210418, #211C04, #04210D

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#1A3BD7
Lighter +30%#152EA9
Lighter +20%#0F227C
Lighter +10%#0A154E
Darker −10%#000000
Darker −20%#000000
Darker −30%#000000
Darker −40%#000000
More saturated +25%#000625
Less saturated −25%#090C1C

Channel breakdown

R4
G9
B33
Red4 (1.6%)
Green9 (3.5%)
Blue33 (12.9%)
Hue229.66°
Saturation (HSL)78.38%
Lightness7.25%
Dominant channelBlue
Hex per channelR 04 · G 09 · B 21

Keep nerding

Every link below is a page Nerdulator can generate from what it already knows about this value.

Nerdulate something else

Nothing in mind? Surprise me · today’s page

Every value on this page was computed from “hex 040921” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.