Nerdulator> put something in

Recognised as Colour

#04051B

  • #04051B
  • Blue
  • Dark
  • Nearest: Black

#04051B is a blue with RGB values 4, 5, 27 and HSL 237°, 74%, 6%. It is a dark colour, so white text on it reaches 20.1:1 contrast (AAA for normal text). The nearest named colour is Black.

Colour values

#04051B#04051B
HEX#04051B
RGBrgb(4, 5, 27)
RGB (0–1)0.0157, 0.0196, 0.1059
RGB percentages1.6%, 2%, 10.6%
HSLhsl(237.4, 74.2%, 6.1%)
HSV / HSBhsv(237.4, 85.2%, 10.6%)
CMYK85.2%, 81.5%, 0%, 89.4%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer263,451
CSS custom property--colour: #04051B;

Brightness & contrast

Relative luminance0.00213WCAG 2.x, 0 is black and 1 is white
Perceived brightness10.1 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 20.14:1
Contrast with white20.14:1WCAG normal text: AAA
Contrast with black1.04:1WCAG normal text: Fail
Greyscale equivalent#060606
Inverted#FBFAE4

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#00081Cno red cones; affects about 1% of men; ΔE 2 from the original
Deuteranopia#00061Bno green cones; the most common form, about 1% of men; ΔE 1.4 from the original
Tritanopia#000A0Eno blue cones; rare, and affects men and women equally; ΔE 11 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text20.14:1WCAG large text: AAA
Contrast with black, large text1.04:1WCAG large text: Fail

Named colours

Black · ΔE 12.6Dark slate grey · ΔE 34.3Dim grey · ΔE 44.3Dark slateblue · ΔE 47.3Midnight blue · ΔE 48.8Slate grey · ΔE 51.3
Nearest named CSS colourBlack (#000000)ΔE 12.65, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#1B1A04
Analogous#04111B, #0E041B
Triadic#1B0405, #051B04
Split complementary#1B0E04, #111B04
Tetradic#1B0411, #1B1A04, #041B0E

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#1E26CD
Lighter +30%#181EA0
Lighter +20%#111574
Lighter +10%#0B0D47
Darker −10%#000000
Darker −20%#000000
Darker −30%#000000
Darker −40%#000000
More saturated +25%#00011F
Less saturated −25%#080917

Channel breakdown

R4
G5
B27
Red4 (1.6%)
Green5 (2%)
Blue27 (10.6%)
Hue237.39°
Saturation (HSL)74.19%
Lightness6.08%
Dominant channelBlue
Hex per channelR 04 · G 05 · B 1B

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 “04051b” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.