#1B4DB4#1B4DB4

#1B4DB4 is a mid, vivid blue. Relative luminance 0.088; OKLCH L 45.4% C 0.172 H 262.4°. Best body text is #FFFFFF at 7.59:1 contrast (WCAG AA passes).

Color values

HEX	#1B4DB4
RGB	rgb(27, 77, 180)
HSL	hsl(220, 74%, 41%)
HSV	hsv(220, 85%, 71%)
CMYK	cmyk(85%, 57.2%, 0%, 29.4%)
CIE-LAB	lab(35.66, 23.47, -59.10)
CIE-LCH	lch(35.66, 63.59, 291.66°)
OKLab	oklab(45.37% -0.0229 -0.1708)
OKLCH	oklch(45.37% 0.172 262.4)
XYZ	xyz(11.3411, 8.8346, 44.2787)
Luminance	0.0884 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B4DB4 #B4821B

analogous

#1B99B4 #1B4DB4 #351BB4

triadic

#1B4DB4 #B41B4D #4DB41B

tetradic

#1B4DB4 #B41B99 #B4821B #1BB435

square

#1B4DB4 #B41B99 #B4821B #1BB435

split-complementary

#1B4DB4 #B4351B #99B41B

monochromatic

#0B1F4A #13367F #1B4DB4 #2D67DF #628EE7

Accessibility & contrast

On white

7.59

#1B4DB4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.77

#1B4DB4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B4DB4

7.59:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B4DB4	#FFFFFF	#000000	##FFFFFF
##1B4DB4	1.00	7.59	2.77	7.59
#FFFFFF	7.59	1.00	21.00	1.00
#000000	2.77	21.00	1.00	21.00
##FFFFFF	7.59	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005BB8

Deuteranopia (green-blind)

#004DB2

Tritanopia (blue-blind)

#006779

Achromatopsia (no color)

#545454

Design tokens & code

CSS

--color: #1b4db4;
/* rgb */ color: rgb(27, 77, 180);
/* oklch */ color: oklch(45.4% 0.172 262.4);

Tailwind

colors: {
  custom: {
    50: '#747ecb',
    500: '#1b4db4',
    950: '#000000',
  },
}

SCSS

$custom: #1b4db4;
$custom-light: #747ecb;
$custom-dark: #000000;

JSON

{
  "hex": "#1b4db4",
  "rgb": {
    "r": 27,
    "g": 77,
    "b": 180
  },
  "hsl": {
    "h": 220.392,
    "s": 73.913,
    "l": 40.588
  },
  "oklch": {
    "l": 0.45369,
    "c": 0.17234,
    "h": 262.4
  },
  "luminance": 0.08836
}

Semantic roles & 50–950 ramp

primary

#1B4DB4

secondary

#CCA85F

accent

#B437F1

background

#F7F7FC

surface

#EEEEF9

border

#C9C9D2

text

#0A0913

muted

#7C7B82

Preview Lab

Preview with #1B4DB4

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

Preview Lab → · Contrast checker → · Palette generator →