#1B4597#1B4597

#1B4597 is a dark, vivid blue. Relative luminance 0.067; OKLCH L 41.3% C 0.143 H 261.9°. Best body text is #FFFFFF at 8.96:1 contrast (WCAG AA passes).

Color values

HEX	#1B4597
RGB	rgb(27, 69, 151)
HSL	hsl(220, 70%, 35%)
HSV	hsv(220, 82%, 59%)
CMYK	cmyk(82.1%, 54.3%, 0%, 40.8%)
CIE-LAB	lab(31.17, 17.30, -49.02)
CIE-LCH	lch(31.17, 51.99, 289.44°)
OKLab	oklab(41.26% -0.0201 -0.1414)
OKLCH	oklch(41.26% 0.143 261.9)
XYZ	xyz(8.1640, 6.7226, 30.1395)
Luminance	0.0672 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B4597 #976D1B

analogous

#1B8397 #1B4597 #2F1B97

triadic

#1B4597 #971B45 #45971B

tetradic

#1B4597 #971B83 #976D1B #1B972F

square

#1B4597 #971B83 #976D1B #1B972F

split-complementary

#1B4597 #972F1B #83971B

monochromatic

#08162F #122D63 #1B4597 #245DCB #4D7FDF

Accessibility & contrast

On white

8.96

#1B4597 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.34

#1B4597 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B4597

8.96:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B4597	#FFFFFF	#000000	##FFFFFF
##1B4597	1.00	8.96	2.34	8.96
#FFFFFF	8.96	1.00	21.00	1.00
#000000	2.34	21.00	1.00	21.00
##FFFFFF	8.96	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#034F9A

Deuteranopia (green-blind)

#004495

Tritanopia (blue-blind)

#005967

Achromatopsia (no color)

#494949

Design tokens & code

CSS

--color: #1b4597;
/* rgb */ color: rgb(27, 69, 151);
/* oklch */ color: oklch(41.3% 0.143 261.9);

Tailwind

colors: {
  custom: {
    50: '#6d78b6',
    500: '#1b4597',
    950: '#000000',
  },
}

SCSS

$custom: #1b4597;
$custom-light: #6d78b6;
$custom-dark: #000000;

JSON

{
  "hex": "#1b4597",
  "rgb": {
    "r": 27,
    "g": 69,
    "b": 151
  },
  "hsl": {
    "h": 219.677,
    "s": 69.663,
    "l": 34.902
  },
  "oklch": {
    "l": 0.41256,
    "c": 0.14278,
    "h": 261.9
  },
  "luminance": 0.06724
}

Semantic roles & 50–950 ramp

primary

#1B4597

secondary

#C19A4C

accent

#B03BEC

background

#F7F7FB

surface

#EDEDF6

border

#C8C8D0

text

#080811

muted

#7B7B80

Preview Lab

Preview with #1B4597

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

Preview Lab → · Contrast checker → · Palette generator →