Nerdulator> put something in

Recognised as Colour

#21556E

  • #21556E
  • Cyan
  • Dark
  • Nearest: Dark slate grey

#21556E is a cyan with RGB values 33, 85, 110 and HSL 199°, 54%, 28%. It is a dark colour, so white text on it reaches 8.1:1 contrast (AAA for normal text). The nearest named colour is Dark slate grey.

Colour values

#21556E#21556E
HEX#21556E
RGBrgb(33, 85, 110)
RGB (0–1)0.1294, 0.3333, 0.4314
RGB percentages12.9%, 33.3%, 43.1%
HSLhsl(199.5, 53.8%, 28%)
HSV / HSBhsv(199.5, 70%, 43.1%)
CMYK70%, 22.7%, 0%, 56.9%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,184,558
CSS custom property--colour: #21556E;

Brightness & contrast

Relative luminance0.07946WCAG 2.x, 0 is black and 1 is white
Perceived brightness77.1 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 8.11:1
Contrast with white8.11:1WCAG normal text: AAA
Contrast with black2.59:1WCAG normal text: Fail
Greyscale equivalent#4C4C4C
Inverted#DEAA91

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#49546Fno red cones; affects about 1% of men; ΔE 11.8 from the original
Deuteranopia#3E4C6Eno green cones; the most common form, about 1% of men; ΔE 13 from the original
Tritanopia#005C5Dno blue cones; rare, and affects men and women equally; ΔE 18.5 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text8.11:1WCAG large text: AAA
Contrast with black, large text2.59:1WCAG large text: Fail

Named colours

Dark slate grey · ΔE 16.2Slate grey · ΔE 21.9Steel blue · ΔE 23Dim grey · ΔE 23.7Light slate grey · ΔE 24.4Teal · ΔE 27.2
Nearest named CSS colourDark slate grey (#2F4F4F)ΔE 16.22, a distinctly different colour
Hue familycyan
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#6E3A21
Analogous#216E60, #212F6E
Triadic#6E2155, #556E21
Split complementary#6E212F, #6E6121
Tetradic#60216E, #6E3A21, #2E6E21

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#82BDD9
Lighter +30%#5AA8CE
Lighter +20%#3992BC
Lighter +10%#2D7395
Darker −10%#153747
Darker −20%#091820
Darker −30%#000000
Darker −40%#000000
More saturated +25%#0F5B80
Less saturated −25%#334F5C

Channel breakdown

R33
G85
B110
Red33 (12.9%)
Green85 (33.3%)
Blue110 (43.1%)
Hue199.48°
Saturation (HSL)53.85%
Lightness28.04%
Dominant channelBlue
Hex per channelR 21 · G 55 · B 6E

Keep nerding

Every link below is a page Nerdulator can generate from what it already knows about this value.

Nerdulate something else

Nothing in mind? Surprise me · today’s page

Every value on this page was computed from “21556e” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.