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Recognised as Colour

#4037CF

  • #4037CF
  • Blue
  • Dark
  • Nearest: Blue violet

#4037CF is a blue with RGB values 64, 55, 207 and HSL 244°, 61%, 51%. It is a dark colour, so white text on it reaches 7.9:1 contrast (AAA for normal text). The nearest named colour is Blue violet.

Colour values

#4037CF#4037CF
HEX#4037CF
RGBrgb(64, 55, 207)
RGB (0–1)0.251, 0.2157, 0.8118
RGB percentages25.1%, 21.6%, 81.2%
HSLhsl(243.6, 61.3%, 51.4%)
HSV / HSBhsv(243.6, 73.4%, 81.2%)
CMYK69.1%, 73.4%, 0%, 18.8%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer4,208,591
CSS custom property--colour: #4037CF;

Brightness & contrast

Relative luminance0.08327WCAG 2.x, 0 is black and 1 is white
Perceived brightness88.8 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 7.88:1
Contrast with white7.88:1WCAG normal text: AAA
Contrast with black2.67:1WCAG normal text: Fail
Greyscale equivalent#444444
Inverted#BFC830

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#0058D3no red cones; affects about 1% of men; ΔE 25 from the original
Deuteranopia#004BCCno green cones; the most common form, about 1% of men; ΔE 18.1 from the original
Tritanopia#006380no blue cones; rare, and affects men and women equally; ΔE 83.2 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text7.88:1WCAG large text: AAA
Contrast with black, large text2.67:1WCAG large text: Fail

Named colours

Blue violet · ΔE 21Dark blue · ΔE 21.4Medium slateblue · ΔE 22.7Dark orchid · ΔE 23.8Medium blue · ΔE 24.6Navy · ΔE 24.8
Nearest named CSS colourBlue violet (#8A2BE2)ΔE 21.02, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#C6CF37
Analogous#377ACF, #8C37CF
Triadic#CF4037, #37CF40
Split complementary#CF8C37, #7ACF37
Tetradic#CF377A, #C6CF37, #37CF8C

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#DDDCF6
Lighter +30%#B6B2ED
Lighter +20%#8F89E3
Lighter +10%#6760D9
Darker −10%#3029AA
Darker −20%#251F81
Darker −30%#191558
Darker −40%#0D0B2F
More saturated +25%#2518EE
Less saturated −25%#5B56B0

Channel breakdown

R64
G55
B207
Red64 (25.1%)
Green55 (21.6%)
Blue207 (81.2%)
Hue243.55°
Saturation (HSL)61.29%
Lightness51.37%
Dominant channelBlue
Hex per channelR 40 · G 37 · B CF

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Every value on this page was computed from “4037cf” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.