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Recognised as Colour

#253A90

  • #253A90
  • Blue
  • Dark
  • Nearest: Dark slateblue

#253A90 is a blue with RGB values 37, 58, 144 and HSL 228°, 59%, 35%. It is a dark colour, so white text on it reaches 10.1:1 contrast (AAA for normal text). The nearest named colour is Dark slateblue.

Colour values

#253A90#253A90
HEX#253A90
RGBrgb(37, 58, 144)
RGB (0–1)0.1451, 0.2275, 0.5647
RGB percentages14.5%, 22.7%, 56.5%
HSLhsl(228.2, 59.1%, 35.5%)
HSV / HSBhsv(228.2, 74.3%, 56.5%)
CMYK74.3%, 59.7%, 0%, 43.5%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,439,824
CSS custom property--colour: #253A90;

Brightness & contrast

Relative luminance0.05433WCAG 2.x, 0 is black and 1 is white
Perceived brightness68.9 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 10.06:1
Contrast with white10.06:1WCAG normal text: AAA
Contrast with black2.09:1WCAG normal text: Fail
Greyscale equivalent#3C3C3C
Inverted#DAC56F

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#004793no red cones; affects about 1% of men; ΔE 11.6 from the original
Deuteranopia#003D8Eno green cones; the most common form, about 1% of men; ΔE 6 from the original
Tritanopia#004F5Fno blue cones; rare, and affects men and women equally; ΔE 51.4 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text10.06:1WCAG large text: AAA
Contrast with black, large text2.09:1WCAG large text: Fail

Named colours

Dark slateblue · ΔE 8.9Midnight blue · ΔE 14.7Rebecca purple · ΔE 20.4Slate blue · ΔE 23Royal blue · ΔE 25.3Indigo · ΔE 29.6
Nearest named CSS colourDark slateblue (#483D8B)ΔE 8.86, clearly different but related
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#907B25
Analogous#256F90, #462590
Triadic#90253A, #3A9025
Split complementary#904625, #709025
Tetradic#90256F, #907B25, #259046

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#9CAAE5
Lighter +30%#7387DB
Lighter +20%#4A65D1
Lighter +10%#2F4AB9
Darker −10%#1B2A67
Darker −20%#10193F
Darker −30%#060916
Darker −40%#000000
More saturated +25%#0E2CA7
Less saturated −25%#3C4879

Channel breakdown

R37
G58
B144
Red37 (14.5%)
Green58 (22.7%)
Blue144 (56.5%)
Hue228.22°
Saturation (HSL)59.12%
Lightness35.49%
Dominant channelBlue
Hex per channelR 25 · G 3A · B 90

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Every value on this page was computed from “253a90” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.