#1B4EB4#1B4EB4

#1B4EB4 is a mid, vivid blue. Relative luminance 0.090; OKLCH L 45.6% C 0.171 H 262.1°. Best body text is #FFFFFF at 7.51:1 contrast (WCAG AA passes).

Color values

HEX	#1B4EB4
RGB	rgb(27, 78, 180)
HSL	hsl(220, 74%, 41%)
HSV	hsv(220, 85%, 71%)
CMYK	cmyk(85%, 56.7%, 0%, 29.4%)
CIE-LAB	lab(35.94, 22.80, -58.65)
CIE-LCH	lch(35.94, 62.93, 291.24°)
OKLab	oklab(45.58% -0.0235 -0.1695)
OKLCH	oklch(45.58% 0.171 262.1)
XYZ	xyz(11.4116, 8.9757, 44.3022)
Luminance	0.0898 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B4EB4 #B4811B

analogous

#1B9AB4 #1B4EB4 #341BB4

triadic

#1B4EB4 #B41B4E #4EB41B

tetradic

#1B4EB4 #B41B9A #B4811B #1BB434

square

#1B4EB4 #B41B9A #B4811B #1BB434

split-complementary

#1B4EB4 #B4341B #9AB41B

monochromatic

#0B204A #13377F #1B4EB4 #2D68DF #628EE7

Accessibility & contrast

On white

7.51

#1B4EB4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.80

#1B4EB4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B4EB4

7.51:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B4EB4	#FFFFFF	#000000	##FFFFFF
##1B4EB4	1.00	7.51	2.80	7.51
#FFFFFF	7.51	1.00	21.00	1.00
#000000	2.80	21.00	1.00	21.00
##FFFFFF	7.51	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005CB8

Deuteranopia (green-blind)

#004EB2

Tritanopia (blue-blind)

#006879

Achromatopsia (no color)

#555555

Design tokens & code

CSS

--color: #1b4eb4;
/* rgb */ color: rgb(27, 78, 180);
/* oklch */ color: oklch(45.6% 0.171 262.1);

Tailwind

colors: {
  custom: {
    50: '#747ecb',
    500: '#1b4eb4',
    950: '#000000',
  },
}

SCSS

$custom: #1b4eb4;
$custom-light: #747ecb;
$custom-dark: #000000;

JSON

{
  "hex": "#1b4eb4",
  "rgb": {
    "r": 27,
    "g": 78,
    "b": 180
  },
  "hsl": {
    "h": 220,
    "s": 73.913,
    "l": 40.588
  },
  "oklch": {
    "l": 0.45576,
    "c": 0.17112,
    "h": 262.1
  },
  "luminance": 0.08977
}

Semantic roles & 50–950 ramp

primary

#1B4EB4

secondary

#CCA85F

accent

#B337F1

background

#F7F7FC

surface

#EEEEF9

border

#C9C9D2

text

#0A0A13

muted

#7C7C82

Preview Lab

Preview with #1B4EB4

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

Preview Lab → · Contrast checker → · Palette generator →