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Recognised as Colour

#25303B

  • #25303B
  • Blue
  • Dark
  • Nearest: Dark slate grey

#25303B is a blue with RGB values 37, 48, 59 and HSL 210°, 23%, 19%. It is a dark colour, so white text on it reaches 13.4:1 contrast (AAA for normal text). The nearest named colour is Dark slate grey.

Colour values

#25303B#25303B
HEX#25303B
RGBrgb(37, 48, 59)
RGB (0–1)0.1451, 0.1882, 0.2314
RGB percentages14.5%, 18.8%, 23.1%
HSLhsl(210, 22.9%, 18.8%)
HSV / HSBhsv(210, 37.3%, 23.1%)
CMYK37.3%, 18.6%, 0%, 76.9%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,437,179
CSS custom property--colour: #25303B;

Brightness & contrast

Relative luminance0.02823WCAG 2.x, 0 is black and 1 is white
Perceived brightness46.5 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 13.42:1
Contrast with white13.42:1WCAG normal text: AAA
Contrast with black1.56:1WCAG normal text: Fail
Greyscale equivalent#2E2E2E
Inverted#DACFC4

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#2C303Cno red cones; affects about 1% of men; ΔE 3 from the original
Deuteranopia#292E3Bno green cones; the most common form, about 1% of men; ΔE 2.9 from the original
Tritanopia#1E3334no blue cones; rare, and affects men and women equally; ΔE 8.4 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text13.42:1WCAG large text: AAA
Contrast with black, large text1.56:1WCAG large text: Fail

Named colours

Dark slate grey · ΔE 16.5Black · ΔE 21.1Dim grey · ΔE 26.5Slate grey · ΔE 33.6Gray · ΔE 35.3Light slate grey · ΔE 36.7
Nearest named CSS colourDark slate grey (#2F4F4F)ΔE 16.47, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#3B3025
Analogous#253B3B, #25253B
Triadic#3B2530, #303B25
Split complementary#3B2525, #3B3B25
Tetradic#3B253B, #3B3025, #253B25

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#7E96AE
Lighter +30%#607D99
Lighter +20%#4C637A
Lighter +10%#394A5A
Darker −10%#11171C
Darker −20%#000000
Darker −30%#000000
Darker −40%#000000
More saturated +25%#193047
Less saturated −25%#303030

Channel breakdown

R37
G48
B59
Red37 (14.5%)
Green48 (18.8%)
Blue59 (23.1%)
Hue210°
Saturation (HSL)22.92%
Lightness18.82%
Dominant channelBlue
Hex per channelR 25 · G 30 · B 3B

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Every value on this page was computed from “25303b” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.