#1B4287#1B4287

#1B4287 is a dark, vivid blue. Relative luminance 0.059; OKLCH L 39.3% C 0.124 H 260.8°. Best body text is #FFFFFF at 9.65:1 contrast (WCAG AA passes).

Color values

HEX	#1B4287
RGB	rgb(27, 66, 135)
HSL	hsl(218, 67%, 32%)
HSV	hsv(218, 80%, 53%)
CMYK	cmyk(80%, 51.1%, 0%, 47.1%)
CIE-LAB	lab(29.10, 12.87, -42.54)
CIE-LCH	lch(29.10, 44.44, 286.84°)
OKLab	oklab(39.31% -0.0197 -0.1223)
OKLCH	oklch(39.31% 0.124 260.8)
XYZ	xyz(6.7718, 5.8779, 23.6946)
Luminance	0.0588 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B4287 #87601B

analogous

#1B7887 #1B4287 #2A1B87

triadic

#1B4287 #871B42 #42871B

tetradic

#1B4287 #871B78 #87601B #1B872A

square

#1B4287 #871B78 #87601B #1B872A

split-complementary

#1B4287 #872A1B #78871B

monochromatic

#071021 #112954 #1B4287 #255BBA #4379D9

Accessibility & contrast

On white

9.65

#1B4287 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.18

#1B4287 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B4287

9.65:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B4287	#FFFFFF	#000000	##FFFFFF
##1B4287	1.00	9.65	2.18	9.65
#FFFFFF	9.65	1.00	21.00	1.00
#000000	2.18	21.00	1.00	21.00
##FFFFFF	9.65	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#184A8A

Deuteranopia (green-blind)

#004086

Tritanopia (blue-blind)

#00535E

Achromatopsia (no color)

#454545

Design tokens & code

CSS

--color: #1b4287;
/* rgb */ color: rgb(27, 66, 135);
/* oklch */ color: oklch(39.3% 0.124 260.8);

Tailwind

colors: {
  custom: {
    50: '#6975aa',
    500: '#1b4287',
    950: '#000000',
  },
}

SCSS

$custom: #1b4287;
$custom-light: #6975aa;
$custom-dark: #000000;

JSON

{
  "hex": "#1b4287",
  "rgb": {
    "r": 27,
    "g": 66,
    "b": 135
  },
  "hsl": {
    "h": 218.333,
    "s": 66.667,
    "l": 31.765
  },
  "oklch": {
    "l": 0.39306,
    "c": 0.12392,
    "h": 260.8
  },
  "luminance": 0.05879
}

Semantic roles & 50–950 ramp

primary

#1B4287

secondary

#BA8F44

accent

#AC3EEA

background

#F6F7FA

surface

#ECEDF4

border

#C7C8CE

text

#070810

muted

#7A7B7F

Preview Lab

Preview with #1B4287

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

Preview Lab → · Contrast checker → · Palette generator →