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Recognised as Colour

#151B37

  • #151B37
  • Blue
  • Dark
  • Nearest: Black

#151B37 is a blue with RGB values 21, 27, 55 and HSL 229°, 45%, 15%. It is a dark colour, so white text on it reaches 16.9:1 contrast (AAA for normal text). The nearest named colour is Black.

Colour values

#151B37#151B37
HEX#151B37
RGBrgb(21, 27, 55)
RGB (0–1)0.0824, 0.1059, 0.2157
RGB percentages8.2%, 10.6%, 21.6%
HSLhsl(229.4, 44.7%, 14.9%)
HSV / HSBhsv(229.4, 61.8%, 21.6%)
CMYK61.8%, 50.9%, 0%, 78.4%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,383,223
CSS custom property--colour: #151B37;

Brightness & contrast

Relative luminance0.01219WCAG 2.x, 0 is black and 1 is white
Perceived brightness30.1 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 16.88:1
Contrast with white16.88:1WCAG normal text: AAA
Contrast with black1.24:1WCAG normal text: Fail
Greyscale equivalent#1C1C1C
Inverted#EAE4C8

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#0F1E38no red cones; affects about 1% of men; ΔE 3.5 from the original
Deuteranopia#0B1B36no green cones; the most common form, about 1% of men; ΔE 3 from the original
Tritanopia#062126no blue cones; rare, and affects men and women equally; ΔE 20 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text16.88:1WCAG large text: AAA
Contrast with black, large text1.24:1WCAG large text: Fail

Named colours

Black · ΔE 23.1Dark slate grey · ΔE 31.9Dark slateblue · ΔE 35.8Midnight blue · ΔE 39.4Dim grey · ΔE 39.5Slate grey · ΔE 44
Nearest named CSS colourBlack (#000000)ΔE 23.12, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#373115
Analogous#152C37, #201537
Triadic#37151B, #1B3715
Split complementary#372015, #2C3715
Tetradic#37152C, #373115, #153720

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#596BBF
Lighter +30%#3F51A6
Lighter +20%#313F81
Lighter +10%#232D5C
Darker −10%#070912
Darker −20%#000000
Darker −30%#000000
Darker −40%#000000
More saturated +25%#0B1541
Less saturated −25%#1E212E

Channel breakdown

R21
G27
B55
Red21 (8.2%)
Green27 (10.6%)
Blue55 (21.6%)
Hue229.41°
Saturation (HSL)44.74%
Lightness14.9%
Dominant channelBlue
Hex per channelR 15 · G 1B · B 37

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Every value on this page was computed from “151b37” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.