#1B4CA0#1B4CA0

#1B4CA0 is a dark, vivid blue. Relative luminance 0.079; OKLCH L 43.5% C 0.146 H 260.5°. Best body text is #FFFFFF at 8.11:1 contrast (WCAG AA passes).

Color values

HEX	#1B4CA0
RGB	rgb(27, 76, 160)
HSL	hsl(218, 71%, 37%)
HSV	hsv(218, 83%, 63%)
CMYK	cmyk(83.1%, 52.5%, 0%, 37.3%)
CIE-LAB	lab(33.86, 16.16, -50.11)
CIE-LCH	lch(33.86, 52.65, 287.87°)
OKLab	oklab(43.52% -0.0241 -0.1444)
OKLCH	oklch(43.52% 0.146 260.5)
XYZ	xyz(9.3793, 7.9388, 34.2889)
Luminance	0.0794 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B4CA0 #A06F1B

analogous

#1B8FA0 #1B4CA0 #2D1BA0

triadic

#1B4CA0 #A01B4C #4CA01B

tetradic

#1B4CA0 #A01B8F #A06F1B #1BA02D

square

#1B4CA0 #A01B8F #A06F1B #1BA02D

split-complementary

#1B4CA0 #A02D1B #8FA01B

monochromatic

#091A37 #12336C #1B4CA0 #2465D4 #5388E2

Accessibility & contrast

On white

8.11

#1B4CA0 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.59

#1B4CA0 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B4CA0

8.11:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B4CA0	#FFFFFF	#000000	##FFFFFF
##1B4CA0	1.00	8.11	2.59	8.11
#FFFFFF	8.11	1.00	21.00	1.00
#000000	2.59	21.00	1.00	21.00
##FFFFFF	8.11	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1156A3

Deuteranopia (green-blind)

#004A9E

Tritanopia (blue-blind)

#00616E

Achromatopsia (no color)

#505050

Design tokens & code

CSS

--color: #1b4ca0;
/* rgb */ color: rgb(27, 76, 160);
/* oklch */ color: oklch(43.5% 0.146 260.5);

Tailwind

colors: {
  custom: {
    50: '#6f7dbd',
    500: '#1b4ca0',
    950: '#000000',
  },
}

SCSS

$custom: #1b4ca0;
$custom-light: #6f7dbd;
$custom-dark: #000000;

JSON

{
  "hex": "#1b4ca0",
  "rgb": {
    "r": 27,
    "g": 76,
    "b": 160
  },
  "hsl": {
    "h": 217.895,
    "s": 71.123,
    "l": 36.667
  },
  "oklch": {
    "l": 0.43516,
    "c": 0.14643,
    "h": 260.5
  },
  "luminance": 0.0794
}

Semantic roles & 50–950 ramp

primary

#1B4CA0

secondary

#C59B52

accent

#AC3AEE

background

#F7F7FB

surface

#EDEEF6

border

#C8C9D0

text

#090912

muted

#7B7B81

Preview Lab

Preview with #1B4CA0

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

Preview Lab → · Contrast checker → · Palette generator →