#1B4AA0#1B4AA0

#1B4AA0 is a dark, vivid blue. Relative luminance 0.077; OKLCH L 43.1% C 0.149 H 261.2°. Best body text is #FFFFFF at 8.29:1 contrast (WCAG AA passes).

Color values

HEX	#1B4AA0
RGB	rgb(27, 74, 160)
HSL	hsl(219, 71%, 37%)
HSV	hsv(219, 83%, 63%)
CMYK	cmyk(83.1%, 53.7%, 0%, 37.3%)
CIE-LAB	lab(33.28, 17.52, -51.04)
CIE-LCH	lch(33.28, 53.97, 288.94°)
OKLab	oklab(43.08% -0.0227 -0.1472)
OKLCH	oklch(43.08% 0.149 261.2)
XYZ	xyz(9.2436, 7.6675, 34.2437)
Luminance	0.0767 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B4AA0 #A0711B

analogous

#1B8DA0 #1B4AA0 #2F1BA0

triadic

#1B4AA0 #A01B4A #4AA01B

tetradic

#1B4AA0 #A01B8D #A0711B #1BA02F

square

#1B4AA0 #A01B8D #A0711B #1BA02F

split-complementary

#1B4AA0 #A02F1B #8DA01B

monochromatic

#091A37 #12326C #1B4AA0 #2462D4 #5386E2

Accessibility & contrast

On white

8.29

#1B4AA0 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.53

#1B4AA0 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B4AA0

8.29:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B4AA0	#FFFFFF	#000000	##FFFFFF
##1B4AA0	1.00	8.29	2.53	8.29
#FFFFFF	8.29	1.00	21.00	1.00
#000000	2.53	21.00	1.00	21.00
##FFFFFF	8.29	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0655A3

Deuteranopia (green-blind)

#00499E

Tritanopia (blue-blind)

#005F6D

Achromatopsia (no color)

#4E4E4E

Design tokens & code

CSS

--color: #1b4aa0;
/* rgb */ color: rgb(27, 74, 160);
/* oklch */ color: oklch(43.1% 0.149 261.2);

Tailwind

colors: {
  custom: {
    50: '#6f7bbd',
    500: '#1b4aa0',
    950: '#000000',
  },
}

SCSS

$custom: #1b4aa0;
$custom-light: #6f7bbd;
$custom-dark: #000000;

JSON

{
  "hex": "#1b4aa0",
  "rgb": {
    "r": 27,
    "g": 74,
    "b": 160
  },
  "hsl": {
    "h": 218.797,
    "s": 71.123,
    "l": 36.667
  },
  "oklch": {
    "l": 0.43078,
    "c": 0.14895,
    "h": 261.2
  },
  "luminance": 0.07669
}

Semantic roles & 50–950 ramp

primary

#1B4AA0

secondary

#C59C52

accent

#AE3AEE

background

#F7F7FB

surface

#EDEDF6

border

#C8C8D0

text

#090912

muted

#7B7B81

Preview Lab

Preview with #1B4AA0

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

Preview Lab → · Contrast checker → · Palette generator →