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Recognised as Colour

#00257B

  • #00257B
  • Blue
  • Dark
  • Nearest: Midnight blue

#00257B is a blue with RGB values 0, 37, 123 and HSL 222°, 100%, 24%. It is a dark colour, so white text on it reaches 13.5:1 contrast (AAA for normal text). The nearest named colour is Midnight blue.

Colour values

#00257B#00257B
HEX#00257B
RGBrgb(0, 37, 123)
RGB (0–1)0, 0.1451, 0.4824
RGB percentages0%, 14.5%, 48.2%
HSLhsl(222, 100%, 24.1%)
HSV / HSBhsv(222, 100%, 48.2%)
CMYK100%, 69.9%, 0%, 51.8%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer9,595
CSS custom property--colour: #00257B;

Brightness & contrast

Relative luminance0.02753WCAG 2.x, 0 is black and 1 is white
Perceived brightness50.3 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 13.54:1
Contrast with white13.54:1WCAG normal text: AAA
Contrast with black1.55:1WCAG normal text: Fail
Greyscale equivalent#232323
Inverted#FFDA84

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#00347Eno red cones; affects about 1% of men; ΔE 11.9 from the original
Deuteranopia#002979no green cones; the most common form, about 1% of men; ΔE 4.7 from the original
Tritanopia#003D4Cno blue cones; rare, and affects men and women equally; ΔE 53.2 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text13.54:1WCAG large text: AAA
Contrast with black, large text1.55:1WCAG large text: Fail

Named colours

Midnight blue · ΔE 6.6Dark slateblue · ΔE 15.1Rebecca purple · ΔE 22.1Indigo · ΔE 25.5Navy · ΔE 25.7Slate blue · ΔE 28.8
Nearest named CSS colourMidnight blue (#191970)ΔE 6.55, clearly different but related
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#7B5600
Analogous#00627B, #19007B
Triadic#7B0025, #257B00
Split complementary#7B1800, #637B00
Tetradic#7B0062, #7B5600, #007B18

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#487FFF
Lighter +30%#155BFF
Lighter +20%#0044E1
Lighter +10%#0034AE
Darker −10%#001648
Darker −20%#000615
Darker −30%#000000
Darker −40%#000000
More saturated +25%#00257B
Less saturated −25%#0F2B6C

Channel breakdown

R0
G37
B123
Red0 (0%)
Green37 (14.5%)
Blue123 (48.2%)
Hue221.95°
Saturation (HSL)100%
Lightness24.12%
Dominant channelBlue
Hex per channelR 00 · G 25 · B 7B

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Every value on this page was computed from “00257b” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.