#1B3085#1B3085

#1B3085 is a dark, vivid blue. Relative luminance 0.040; OKLCH L 35.3% C 0.144 H 267.5°. Best body text is #FFFFFF at 11.62:1 contrast (WCAG AA passes).

Color values

HEX	#1B3085
RGB	rgb(27, 48, 133)
HSL	hsl(228, 66%, 31%)
HSV	hsv(228, 80%, 52%)
CMYK	cmyk(79.7%, 63.9%, 0%, 47.8%)
CIE-LAB	lab(23.80, 24.62, -49.90)
CIE-LCH	lch(23.80, 55.64, 296.26°)
OKLab	oklab(35.26% -0.0064 -0.1443)
OKLCH	oklch(35.26% 0.144 267.5)
XYZ	xyz(5.7411, 4.0397, 22.6629)
Luminance	0.0404 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B3085 #85701B

analogous

#1B6585 #1B3085 #3B1B85

triadic

#1B3085 #851B30 #30851B

tetradic

#1B3085 #851B65 #85701B #1B853B

square

#1B3085 #851B65 #85701B #1B853B

split-complementary

#1B3085 #853B1B #65851B

monochromatic

#060B1F #111E52 #1B3085 #2542B8 #4260D9

Accessibility & contrast

On white

11.62

#1B3085 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.81

#1B3085 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B3085

11.62:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B3085	#FFFFFF	#000000	##FFFFFF
##1B3085	1.00	11.62	1.81	11.62
#FFFFFF	11.62	1.00	21.00	1.00
#000000	1.81	21.00	1.00	21.00
##FFFFFF	11.62	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003E88

Deuteranopia (green-blind)

#003483

Tritanopia (blue-blind)

#004655

Achromatopsia (no color)

#393939

Design tokens & code

CSS

--color: #1b3085;
/* rgb */ color: rgb(27, 48, 133);
/* oklch */ color: oklch(35.3% 0.144 267.5);

Tailwind

colors: {
  custom: {
    50: '#6a68a9',
    500: '#1b3085',
    950: '#000000',
  },
}

SCSS

$custom: #1b3085;
$custom-light: #6a68a9;
$custom-dark: #000000;

JSON

{
  "hex": "#1b3085",
  "rgb": {
    "r": 27,
    "g": 48,
    "b": 133
  },
  "hsl": {
    "h": 228.113,
    "s": 66.25,
    "l": 31.373
  },
  "oklch": {
    "l": 0.3526,
    "c": 0.14444,
    "h": 267.5
  },
  "luminance": 0.0404
}

Semantic roles & 50–950 ramp

primary

#1B3085

secondary

#B8A144

accent

#C73FE9

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#070610

muted

#7A7A7F

Preview Lab

Preview with #1B3085

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

Preview Lab → · Contrast checker → · Palette generator →