#1B4BA1#1B4BA1

#1B4BA1 is a dark, vivid blue. Relative luminance 0.078; OKLCH L 43.4% C 0.149 H 261.0°. Best body text is #FFFFFF at 8.18:1 contrast (WCAG AA passes).

Color values

HEX	#1B4BA1
RGB	rgb(27, 75, 161)
HSL	hsl(219, 71%, 37%)
HSV	hsv(219, 83%, 63%)
CMYK	cmyk(83.2%, 53.4%, 0%, 36.9%)
CIE-LAB	lab(33.64, 17.24, -51.06)
CIE-LCH	lch(33.64, 53.89, 288.66°)
OKLab	oklab(43.38% -0.0233 -0.1472)
OKLCH	oklch(43.38% 0.149 261)
XYZ	xyz(9.3988, 7.8372, 34.7287)
Luminance	0.0784 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B4BA1 #A1711B

analogous

#1B8EA1 #1B4BA1 #2E1BA1

triadic

#1B4BA1 #A11B4B #4BA11B

tetradic

#1B4BA1 #A11B8E #A1711B #1BA12E

square

#1B4BA1 #A11B8E #A1711B #1BA12E

split-complementary

#1B4BA1 #A12E1B #8EA11B

monochromatic

#091A38 #12336D #1B4BA1 #2463D5 #5487E2

Accessibility & contrast

On white

8.18

#1B4BA1 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.57

#1B4BA1 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B4BA1

8.18:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B4BA1	#FFFFFF	#000000	##FFFFFF
##1B4BA1	1.00	8.18	2.57	8.18
#FFFFFF	8.18	1.00	21.00	1.00
#000000	2.57	21.00	1.00	21.00
##FFFFFF	8.18	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0955A4

Deuteranopia (green-blind)

#00499F

Tritanopia (blue-blind)

#00606E

Achromatopsia (no color)

#4F4F4F

Design tokens & code

CSS

--color: #1b4ba1;
/* rgb */ color: rgb(27, 75, 161);
/* oklch */ color: oklch(43.4% 0.149 261.0);

Tailwind

colors: {
  custom: {
    50: '#6f7cbd',
    500: '#1b4ba1',
    950: '#000000',
  },
}

SCSS

$custom: #1b4ba1;
$custom-light: #6f7cbd;
$custom-dark: #000000;

JSON

{
  "hex": "#1b4ba1",
  "rgb": {
    "r": 27,
    "g": 75,
    "b": 161
  },
  "hsl": {
    "h": 218.507,
    "s": 71.277,
    "l": 36.863
  },
  "oklch": {
    "l": 0.43377,
    "c": 0.14906,
    "h": 261
  },
  "luminance": 0.07838
}

Semantic roles & 50–950 ramp

primary

#1B4BA1

secondary

#C59C52

accent

#AD3AEE

background

#F7F7FB

surface

#EDEEF7

border

#C8C9D0

text

#090912

muted

#7B7B81

Preview Lab

Preview with #1B4BA1

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

Preview Lab → · Contrast checker → · Palette generator →