#1B3286#1B3286

#1B3286 is a dark, vivid blue. Relative luminance 0.042; OKLCH L 35.8% C 0.143 H 266.9°. Best body text is #FFFFFF at 11.37:1 contrast (WCAG AA passes).

Color values

HEX	#1B3286
RGB	rgb(27, 50, 134)
HSL	hsl(227, 66%, 32%)
HSV	hsv(227, 80%, 53%)
CMYK	cmyk(79.9%, 62.7%, 0%, 47.5%)
CIE-LAB	lab(24.43, 23.63, -49.50)
CIE-LCH	lch(24.43, 54.85, 295.52°)
OKLab	oklab(35.76% -0.0077 -0.1431)
OKLCH	oklch(35.76% 0.143 266.9)
XYZ	xyz(5.8942, 4.2348, 23.0564)
Luminance	0.0423 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B3286 #866F1B

analogous

#1B6886 #1B3286 #3A1B86

triadic

#1B3286 #861B32 #32861B

tetradic

#1B3286 #861B68 #866F1B #1B863A

square

#1B3286 #861B68 #866F1B #1B863A

split-complementary

#1B3286 #863A1B #68861B

monochromatic

#060C20 #111F53 #1B3286 #2545B9 #4263D9

Accessibility & contrast

On white

11.37

#1B3286 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.85

#1B3286 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B3286

11.37:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B3286	#FFFFFF	#000000	##FFFFFF
##1B3286	1.00	11.37	1.85	11.37
#FFFFFF	11.37	1.00	21.00	1.00
#000000	1.85	21.00	1.00	21.00
##FFFFFF	11.37	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003F89

Deuteranopia (green-blind)

#003584

Tritanopia (blue-blind)

#004857

Achromatopsia (no color)

#3A3A3A

Design tokens & code

CSS

--color: #1b3286;
/* rgb */ color: rgb(27, 50, 134);
/* oklch */ color: oklch(35.8% 0.143 266.9);

Tailwind

colors: {
  custom: {
    50: '#6a69aa',
    500: '#1b3286',
    950: '#000000',
  },
}

SCSS

$custom: #1b3286;
$custom-light: #6a69aa;
$custom-dark: #000000;

JSON

{
  "hex": "#1b3286",
  "rgb": {
    "r": 27,
    "g": 50,
    "b": 134
  },
  "hsl": {
    "h": 227.103,
    "s": 66.46,
    "l": 31.569
  },
  "oklch": {
    "l": 0.35756,
    "c": 0.14329,
    "h": 266.9
  },
  "luminance": 0.04235
}

Semantic roles & 50–950 ramp

primary

#1B3286

secondary

#B9A044

accent

#C53EE9

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#080610

muted

#7A7A7F

Preview Lab

Preview with #1B3286

Body copy rendered with the generated semantic roles for this colour.

Preview Lab → · Contrast checker → · Palette generator →