#1B4FA7#1B4FA7

#1B4FA7 is a dark, vivid blue. Relative luminance 0.086; OKLCH L 44.7% C 0.152 H 260.4°. Best body text is #FFFFFF at 7.71:1 contrast (WCAG AA passes).

Color values

HEX	#1B4FA7
RGB	rgb(27, 79, 167)
HSL	hsl(218, 72%, 38%)
HSV	hsv(218, 84%, 65%)
CMYK	cmyk(83.8%, 52.7%, 0%, 34.5%)
CIE-LAB	lab(35.23, 16.95, -52.08)
CIE-LCH	lch(35.23, 54.77, 288.02°)
OKLab	oklab(44.73% -0.0254 -0.1502)
OKLCH	oklch(44.73% 0.152 260.4)
XYZ	xyz(10.2205, 8.6137, 37.6757)
Luminance	0.0862 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B4FA7 #A7731B

analogous

#1B95A7 #1B4FA7 #2D1BA7

triadic

#1B4FA7 #A71B4F #4FA71B

tetradic

#1B4FA7 #A71B95 #A7731B #1BA72D

square

#1B4FA7 #A71B95 #A7731B #1BA72D

split-complementary

#1B4FA7 #A72D1B #95A71B

monochromatic

#0A1D3E #123672 #1B4FA7 #2468DC #588CE4

Accessibility & contrast

On white

7.71

#1B4FA7 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.72

#1B4FA7 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B4FA7

7.71:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B4FA7	#FFFFFF	#000000	##FFFFFF
##1B4FA7	1.00	7.71	2.72	7.71
#FFFFFF	7.71	1.00	21.00	1.00
#000000	2.72	21.00	1.00	21.00
##FFFFFF	7.71	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0F5AAA

Deuteranopia (green-blind)

#004DA5

Tritanopia (blue-blind)

#006573

Achromatopsia (no color)

#535353

Design tokens & code

CSS

--color: #1b4fa7;
/* rgb */ color: rgb(27, 79, 167);
/* oklch */ color: oklch(44.7% 0.152 260.4);

Tailwind

colors: {
  custom: {
    50: '#717fc2',
    500: '#1b4fa7',
    950: '#000000',
  },
}

SCSS

$custom: #1b4fa7;
$custom-light: #717fc2;
$custom-dark: #000000;

JSON

{
  "hex": "#1b4fa7",
  "rgb": {
    "r": 27,
    "g": 79,
    "b": 167
  },
  "hsl": {
    "h": 217.714,
    "s": 72.165,
    "l": 38.039
  },
  "oklch": {
    "l": 0.44727,
    "c": 0.15229,
    "h": 260.4
  },
  "luminance": 0.08615
}

Semantic roles & 50–950 ramp

primary

#1B4FA7

secondary

#C89D56

accent

#AB39EF

background

#F7F7FC

surface

#EDEEF8

border

#C8C9D1

text

#090A12

muted

#7B7C81

Preview Lab

Preview with #1B4FA7

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

Preview Lab → · Contrast checker → · Palette generator →