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Recognised as Colour

#030057

  • #030057
  • Blue
  • Dark
  • Nearest: Midnight blue

#030057 is a blue with RGB values 3, 0, 87 and HSL 242°, 100%, 17%. It is a dark colour, so white text on it reaches 18.4:1 contrast (AAA for normal text). The nearest named colour is Midnight blue.

Colour values

#030057#030057
HEX#030057
RGBrgb(3, 0, 87)
RGB (0–1)0.0118, 0, 0.3412
RGB percentages1.2%, 0%, 34.1%
HSLhsl(242.1, 100%, 17.1%)
HSV / HSBhsv(242.1, 100%, 34.1%)
CMYK96.6%, 100%, 0%, 65.9%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer196,695
CSS custom property--colour: #030057;

Brightness & contrast

Relative luminance0.00707WCAG 2.x, 0 is black and 1 is white
Perceived brightness29.4 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 18.4:1
Contrast with white18.4:1WCAG normal text: AAA
Contrast with black1.14:1WCAG normal text: Fail
Greyscale equivalent#070707
Inverted#FCFFA8

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#001959no red cones; affects about 1% of men; ΔE 18.2 from the original
Deuteranopia#000F56no green cones; the most common form, about 1% of men; ΔE 11.1 from the original
Tritanopia#001F2Fno blue cones; rare, and affects men and women equally; ΔE 53.2 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text18.4:1WCAG large text: AAA
Contrast with black, large text1.14:1WCAG large text: Fail

Named colours

Midnight blue · ΔE 10.3Navy · ΔE 20.9Indigo · ΔE 21.8Dark blue · ΔE 26.2Dark slateblue · ΔE 27.1Rebecca purple · ΔE 27.5
Nearest named CSS colourMidnight blue (#191970)ΔE 10.31, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#545700
Analogous#002857, #2E0057
Triadic#570300, #005703
Split complementary#572F00, #285700
Tetradic#570029, #545700, #00572F

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#2C24FF
Lighter +30%#0800F0
Lighter +20%#0700BD
Lighter +10%#05008A
Darker −10%#010024
Darker −20%#000000
Darker −30%#000000
Darker −40%#000000
More saturated +25%#030057
Less saturated −25%#0D0B4C

Channel breakdown

R3
G0
B87
Red3 (1.2%)
Green0 (0%)
Blue87 (34.1%)
Hue242.07°
Saturation (HSL)100%
Lightness17.06%
Dominant channelBlue
Hex per channelR 03 · G 00 · B 57

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Every value on this page was computed from “hex 030057” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.