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Recognised as Colour

#30237A

  • #30237A
  • Blue
  • Dark
  • Nearest: Midnight blue

#30237A is a blue with RGB values 48, 35, 122 and HSL 249°, 55%, 31%. It is a dark colour, so white text on it reaches 12.7:1 contrast (AAA for normal text). The nearest named colour is Midnight blue.

Colour values

#30237A#30237A
HEX#30237A
RGBrgb(48, 35, 122)
RGB (0–1)0.1882, 0.1373, 0.4784
RGB percentages18.8%, 13.7%, 47.8%
HSLhsl(249, 55.4%, 30.8%)
HSV / HSBhsv(249, 71.3%, 47.8%)
CMYK60.7%, 71.3%, 0%, 52.2%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer3,154,810
CSS custom property--colour: #30237A;

Brightness & contrast

Relative luminance0.03236WCAG 2.x, 0 is black and 1 is white
Perceived brightness55.7 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 12.75:1
Contrast with white12.75:1WCAG normal text: AAA
Contrast with black1.65:1WCAG normal text: Fail
Greyscale equivalent#2C2C2C
Inverted#CFDC85

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#00357Dno red cones; affects about 1% of men; ΔE 16.9 from the original
Deuteranopia#002F78no green cones; the most common form, about 1% of men; ΔE 14.4 from the original
Tritanopia#033A4Bno blue cones; rare, and affects men and women equally; ΔE 52.8 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text12.75:1WCAG large text: AAA
Contrast with black, large text1.65:1WCAG large text: Fail

Named colours

Midnight blue · ΔE 5.5Dark slateblue · ΔE 12.8Rebecca purple · ΔE 16.1Indigo · ΔE 20.4Navy · ΔE 24.4Slate blue · ΔE 26.7
Nearest named CSS colourMidnight blue (#191970)ΔE 5.51, clearly different but related
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#6D7A23
Analogous#23427A, #5C237A
Triadic#7A3023, #237A30
Split complementary#7A5B23, #427A23
Tetradic#7A2342, #6D7A23, #237A5C

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#988BDE
Lighter +30%#7464D2
Lighter +20%#513CC7
Lighter +10%#402EA2
Darker −10%#201852
Darker −20%#110C2B
Darker −30%#010103
Darker −40%#000000
More saturated +25%#220F8E
Less saturated −25%#3E3766

Channel breakdown

R48
G35
B122
Red48 (18.8%)
Green35 (13.7%)
Blue122 (47.8%)
Hue248.97°
Saturation (HSL)55.41%
Lightness30.78%
Dominant channelBlue
Hex per channelR 30 · G 23 · B 7A

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Every value on this page was computed from “30237a” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.