#1B3485#1B3485

#1B3485 is a dark, vivid blue. Relative luminance 0.044; OKLCH L 36.1% C 0.139 H 266.2°. Best body text is #FFFFFF at 11.19:1 contrast (WCAG AA passes).

Color values

HEX	#1B3485
RGB	rgb(27, 52, 133)
HSL	hsl(226, 66%, 31%)
HSV	hsv(226, 80%, 52%)
CMYK	cmyk(79.7%, 60.9%, 0%, 47.8%)
CIE-LAB	lab(24.90, 21.84, -48.12)
CIE-LCH	lch(24.90, 52.84, 294.41°)
OKLab	oklab(36.07% -0.0091 -0.139)
OKLCH	oklch(36.07% 0.139 266.2)
XYZ	xyz(5.9121, 4.3818, 22.7199)
Luminance	0.0438 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B3485 #856C1B

analogous

#1B6985 #1B3485 #371B85

triadic

#1B3485 #851B34 #34851B

tetradic

#1B3485 #851B69 #856C1B #1B8537

square

#1B3485 #851B69 #856C1B #1B8537

split-complementary

#1B3485 #85371B #69851B

monochromatic

#060C1F #112052 #1B3485 #2548B8 #4265D9

Accessibility & contrast

On white

11.19

#1B3485 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.88

#1B3485 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B3485

11.19:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B3485	#FFFFFF	#000000	##FFFFFF
##1B3485	1.00	11.19	1.88	11.19
#FFFFFF	11.19	1.00	21.00	1.00
#000000	1.88	21.00	1.00	21.00
##FFFFFF	11.19	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004088

Deuteranopia (green-blind)

#003683

Tritanopia (blue-blind)

#004957

Achromatopsia (no color)

#3B3B3B

Design tokens & code

CSS

--color: #1b3485;
/* rgb */ color: rgb(27, 52, 133);
/* oklch */ color: oklch(36.1% 0.139 266.2);

Tailwind

colors: {
  custom: {
    50: '#6a6ba9',
    500: '#1b3485',
    950: '#000000',
  },
}

SCSS

$custom: #1b3485;
$custom-light: #6a6ba9;
$custom-dark: #000000;

JSON

{
  "hex": "#1b3485",
  "rgb": {
    "r": 27,
    "g": 52,
    "b": 133
  },
  "hsl": {
    "h": 225.849,
    "s": 66.25,
    "l": 31.373
  },
  "oklch": {
    "l": 0.36073,
    "c": 0.13931,
    "h": 266.2
  },
  "luminance": 0.04382
}

Semantic roles & 50–950 ramp

primary

#1B3485

secondary

#B89D44

accent

#C13FE9

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#070610

muted

#7A7A7F

Preview Lab

Preview with #1B3485

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

Preview Lab → · Contrast checker → · Palette generator →