#1B4CB4#1B4CB4

#1B4CB4 is a mid, vivid blue. Relative luminance 0.087; OKLCH L 45.2% C 0.174 H 262.6°. Best body text is #FFFFFF at 7.67:1 contrast (WCAG AA passes).

Color values

HEX	#1B4CB4
RGB	rgb(27, 76, 180)
HSL	hsl(221, 74%, 41%)
HSV	hsv(221, 85%, 71%)
CMYK	cmyk(85%, 57.8%, 0%, 29.4%)
CIE-LAB	lab(35.39, 24.14, -59.54)
CIE-LCH	lch(35.39, 64.25, 292.06°)
OKLab	oklab(45.16% -0.0223 -0.1721)
OKLCH	oklch(45.16% 0.174 262.6)
XYZ	xyz(11.2717, 8.6958, 44.2555)
Luminance	0.0870 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B4CB4 #B4831B

analogous

#1B98B4 #1B4CB4 #361BB4

triadic

#1B4CB4 #B41B4C #4CB41B

tetradic

#1B4CB4 #B41B98 #B4831B #1BB436

square

#1B4CB4 #B41B98 #B4831B #1BB436

split-complementary

#1B4CB4 #B4361B #98B41B

monochromatic

#0B1F4A #13367F #1B4CB4 #2D66DF #628DE7

Accessibility & contrast

On white

7.67

#1B4CB4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.74

#1B4CB4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B4CB4

7.67:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B4CB4	#FFFFFF	#000000	##FFFFFF
##1B4CB4	1.00	7.67	2.74	7.67
#FFFFFF	7.67	1.00	21.00	1.00
#000000	2.74	21.00	1.00	21.00
##FFFFFF	7.67	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005AB8

Deuteranopia (green-blind)

#004DB2

Tritanopia (blue-blind)

#006678

Achromatopsia (no color)

#535353

Design tokens & code

CSS

--color: #1b4cb4;
/* rgb */ color: rgb(27, 76, 180);
/* oklch */ color: oklch(45.2% 0.174 262.6);

Tailwind

colors: {
  custom: {
    50: '#747dcb',
    500: '#1b4cb4',
    950: '#000000',
  },
}

SCSS

$custom: #1b4cb4;
$custom-light: #747dcb;
$custom-dark: #000000;

JSON

{
  "hex": "#1b4cb4",
  "rgb": {
    "r": 27,
    "g": 76,
    "b": 180
  },
  "hsl": {
    "h": 220.784,
    "s": 73.913,
    "l": 40.588
  },
  "oklch": {
    "l": 0.45164,
    "c": 0.17357,
    "h": 262.6
  },
  "luminance": 0.08697
}

Semantic roles & 50–950 ramp

primary

#1B4CB4

secondary

#CCA95F

accent

#B537F1

background

#F7F7FC

surface

#EEEEF9

border

#C9C9D2

text

#0A0913

muted

#7C7B82

Preview Lab

Preview with #1B4CB4

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

Preview Lab → · Contrast checker → · Palette generator →