#1B4BA5#1B4BA5

#1B4BA5 is a dark, vivid blue. Relative luminance 0.080; OKLCH L 43.7% C 0.155 H 261.5°. Best body text is #FFFFFF at 8.09:1 contrast (WCAG AA passes).

Color values

HEX	#1B4BA5
RGB	rgb(27, 75, 165)
HSL	hsl(219, 72%, 38%)
HSV	hsv(219, 84%, 65%)
CMYK	cmyk(83.6%, 54.5%, 0%, 35.3%)
CIE-LAB	lab(33.94, 18.85, -52.97)
CIE-LCH	lch(33.94, 56.23, 289.58°)
OKLab	oklab(43.7% -0.0228 -0.1529)
OKLCH	oklch(43.7% 0.155 261.5)
XYZ	xyz(9.7571, 7.9806, 36.6162)
Luminance	0.0798 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B4BA5 #A5751B

analogous

#1B90A5 #1B4BA5 #301BA5

triadic

#1B4BA5 #A51B4B #4BA51B

tetradic

#1B4BA5 #A51B90 #A5751B #1BA530

square

#1B4BA5 #A51B90 #A5751B #1BA530

split-complementary

#1B4BA5 #A5301B #90A51B

monochromatic

#0A1B3C #123370 #1B4BA5 #2463DA #5788E3

Accessibility & contrast

On white

8.09

#1B4BA5 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.60

#1B4BA5 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B4BA5

8.09:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B4BA5	#FFFFFF	#000000	##FFFFFF
##1B4BA5	1.00	8.09	2.60	8.09
#FFFFFF	8.09	1.00	21.00	1.00
#000000	2.60	21.00	1.00	21.00
##FFFFFF	8.09	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0056A8

Deuteranopia (green-blind)

#004AA3

Tritanopia (blue-blind)

#006170

Achromatopsia (no color)

#505050

Design tokens & code

CSS

--color: #1b4ba5;
/* rgb */ color: rgb(27, 75, 165);
/* oklch */ color: oklch(43.7% 0.155 261.5);

Tailwind

colors: {
  custom: {
    50: '#707cc0',
    500: '#1b4ba5',
    950: '#000000',
  },
}

SCSS

$custom: #1b4ba5;
$custom-light: #707cc0;
$custom-dark: #000000;

JSON

{
  "hex": "#1b4ba5",
  "rgb": {
    "r": 27,
    "g": 75,
    "b": 165
  },
  "hsl": {
    "h": 219.13,
    "s": 71.875,
    "l": 37.647
  },
  "oklch": {
    "l": 0.437,
    "c": 0.15456,
    "h": 261.5
  },
  "luminance": 0.07982
}

Semantic roles & 50–950 ramp

primary

#1B4BA5

secondary

#C79F55

accent

#B039EF

background

#F7F7FB

surface

#EDEEF7

border

#C8C9D0

text

#090912

muted

#7B7B81

Preview Lab

Preview with #1B4BA5

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

Preview Lab → · Contrast checker → · Palette generator →