#1B4088#1B4088

#1B4088 is a dark, vivid blue. Relative luminance 0.057; OKLCH L 38.9% C 0.128 H 261.9°. Best body text is #FFFFFF at 9.83:1 contrast (WCAG AA passes).

Color values

HEX	#1B4088
RGB	rgb(27, 64, 136)
HSL	hsl(220, 67%, 32%)
HSV	hsv(220, 80%, 53%)
CMYK	cmyk(80.1%, 52.9%, 0%, 46.7%)
CIE-LAB	lab(28.58, 14.67, -44.00)
CIE-LCH	lch(28.58, 46.38, 288.44°)
OKLab	oklab(38.93% -0.018 -0.1267)
OKLCH	oklch(38.93% 0.128 261.9)
XYZ	xyz(6.7277, 5.6766, 24.0289)
Luminance	0.0568 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B4088 #88631B

analogous

#1B7788 #1B4088 #2D1B88

triadic

#1B4088 #881B40 #40881B

tetradic

#1B4088 #881B77 #88631B #1B882D

square

#1B4088 #881B77 #88631B #1B882D

split-complementary

#1B4088 #882D1B #77881B

monochromatic

#071022 #112855 #1B4088 #2558BB #4477DA

Accessibility & contrast

On white

9.83

#1B4088 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.14

#1B4088 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B4088

9.83:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B4088	#FFFFFF	#000000	##FFFFFF
##1B4088	1.00	9.83	2.14	9.83
#FFFFFF	9.83	1.00	21.00	1.00
#000000	2.14	21.00	1.00	21.00
##FFFFFF	9.83	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#10498B

Deuteranopia (green-blind)

#003F87

Tritanopia (blue-blind)

#00515D

Achromatopsia (no color)

#434343

Design tokens & code

CSS

--color: #1b4088;
/* rgb */ color: rgb(27, 64, 136);
/* oklch */ color: oklch(38.9% 0.128 261.9);

Tailwind

colors: {
  custom: {
    50: '#6a74ab',
    500: '#1b4088',
    950: '#000000',
  },
}

SCSS

$custom: #1b4088;
$custom-light: #6a74ab;
$custom-dark: #000000;

JSON

{
  "hex": "#1b4088",
  "rgb": {
    "r": 27,
    "g": 64,
    "b": 136
  },
  "hsl": {
    "h": 219.633,
    "s": 66.871,
    "l": 31.961
  },
  "oklch": {
    "l": 0.38931,
    "c": 0.12795,
    "h": 261.9
  },
  "luminance": 0.05677
}

Semantic roles & 50–950 ramp

primary

#1B4088

secondary

#BB9344

accent

#AF3EEA

background

#F6F7FA

surface

#ECEDF4

border

#C7C8CE

text

#070810

muted

#7A7B7F

Preview Lab

Preview with #1B4088

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

Preview Lab → · Contrast checker → · Palette generator →