#1B347D#1B347D

#1B347D is a dark, vivid blue. Relative luminance 0.042; OKLCH L 35.4% C 0.128 H 265.7°. Best body text is #FFFFFF at 11.45:1 contrast (WCAG AA passes).

Color values

HEX	#1B347D
RGB	rgb(27, 52, 125)
HSL	hsl(225, 64%, 30%)
HSV	hsv(225, 78%, 49%)
CMYK	cmyk(78.4%, 58.4%, 0%, 51%)
CIE-LAB	lab(24.22, 18.61, -44.19)
CIE-LCH	lch(24.22, 47.95, 292.84°)
OKLab	oklab(35.36% -0.0095 -0.1275)
OKLCH	oklch(35.36% 0.128 265.7)
XYZ	xyz(5.3804, 4.1691, 19.9192)
Luminance	0.0417 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B347D #7D641B

analogous

#1B657D #1B347D #331B7D

triadic

#1B347D #7D1B34 #347D1B

tetradic

#1B347D #7D1B65 #7D641B #1B7D33

square

#1B347D #7D1B65 #7D641B #1B7D33

split-complementary

#1B347D #7D331B #657D1B

monochromatic

#050A19 #101F4B #1B347D #2649AF #3D64D5

Accessibility & contrast

On white

11.45

#1B347D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.83

#1B347D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B347D

11.45:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B347D	#FFFFFF	#000000	##FFFFFF
##1B347D	1.00	11.45	1.83	11.45
#FFFFFF	11.45	1.00	21.00	1.00
#000000	1.83	21.00	1.00	21.00
##FFFFFF	11.45	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003E80

Deuteranopia (green-blind)

#00357C

Tritanopia (blue-blind)

#004653

Achromatopsia (no color)

#3A3A3A

Design tokens & code

CSS

--color: #1b347d;
/* rgb */ color: rgb(27, 52, 125);
/* oklch */ color: oklch(35.4% 0.128 265.7);

Tailwind

colors: {
  custom: {
    50: '#676ba3',
    500: '#1b347d',
    950: '#000000',
  },
}

SCSS

$custom: #1b347d;
$custom-light: #676ba3;
$custom-dark: #000000;

JSON

{
  "hex": "#1b347d",
  "rgb": {
    "r": 27,
    "g": 52,
    "b": 125
  },
  "hsl": {
    "h": 224.694,
    "s": 64.474,
    "l": 29.804
  },
  "oklch": {
    "l": 0.35358,
    "c": 0.12781,
    "h": 265.7
  },
  "luminance": 0.0417
}

Semantic roles & 50–950 ramp

primary

#1B347D

secondary

#B19543

accent

#BD40E7

background

#F6F6FA

surface

#EBEBF4

border

#C6C6CE

text

#07060F

muted

#7A7A7F

Preview Lab

Preview with #1B347D

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

Preview Lab → · Contrast checker → · Palette generator →