#1B4285#1B4285

#1B4285 is a dark, vivid blue. Relative luminance 0.058; OKLCH L 39.1% C 0.121 H 260.5°. Best body text is #FFFFFF at 9.70:1 contrast (WCAG AA passes).

Color values

HEX	#1B4285
RGB	rgb(27, 66, 133)
HSL	hsl(218, 66%, 31%)
HSV	hsv(218, 80%, 52%)
CMYK	cmyk(79.7%, 50.4%, 0%, 47.8%)
CIE-LAB	lab(28.96, 12.06, -41.53)
CIE-LCH	lch(28.96, 43.24, 286.19°)
OKLab	oklab(39.15% -0.02 -0.1194)
OKLCH	oklch(39.15% 0.121 260.5)
XYZ	xyz(6.6323, 5.8221, 22.9600)
Luminance	0.0582 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B4285 #855E1B

analogous

#1B7785 #1B4285 #291B85

triadic

#1B4285 #851B42 #42851B

tetradic

#1B4285 #851B77 #855E1B #1B8529

square

#1B4285 #851B77 #855E1B #1B8529

split-complementary

#1B4285 #85291B #77851B

monochromatic

#06101F #112952 #1B4285 #255BB8 #4279D9

Accessibility & contrast

On white

9.70

#1B4285 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.16

#1B4285 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B4285

9.70:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B4285	#FFFFFF	#000000	##FFFFFF
##1B4285	1.00	9.70	2.16	9.70
#FFFFFF	9.70	1.00	21.00	1.00
#000000	2.16	21.00	1.00	21.00
##FFFFFF	9.70	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1B4987

Deuteranopia (green-blind)

#004084

Tritanopia (blue-blind)

#00525D

Achromatopsia (no color)

#444444

Design tokens & code

CSS

--color: #1b4285;
/* rgb */ color: rgb(27, 66, 133);
/* oklch */ color: oklch(39.1% 0.121 260.5);

Tailwind

colors: {
  custom: {
    50: '#6975a9',
    500: '#1b4285',
    950: '#000000',
  },
}

SCSS

$custom: #1b4285;
$custom-light: #6975a9;
$custom-dark: #000000;

JSON

{
  "hex": "#1b4285",
  "rgb": {
    "r": 27,
    "g": 66,
    "b": 133
  },
  "hsl": {
    "h": 217.925,
    "s": 66.25,
    "l": 31.373
  },
  "oklch": {
    "l": 0.3915,
    "c": 0.12104,
    "h": 260.5
  },
  "luminance": 0.05823
}

Semantic roles & 50–950 ramp

primary

#1B4285

secondary

#B88D44

accent

#AA3FE9

background

#F6F7FA

surface

#ECEDF4

border

#C7C8CE

text

#070810

muted

#7A7B7F

Preview Lab

Preview with #1B4285

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

Preview Lab → · Contrast checker → · Palette generator →