#1B3197#1B3197

#1B3197 is a dark, vivid blue. Relative luminance 0.047; OKLCH L 37.2% C 0.168 H 267.4°. Best body text is #FFFFFF at 10.87:1 contrast (WCAG AA passes).

Color values

HEX	#1B3197
RGB	rgb(27, 49, 151)
HSL	hsl(229, 70%, 35%)
HSV	hsv(229, 82%, 59%)
CMYK	cmyk(82.1%, 67.5%, 0%, 40.8%)
CIE-LAB	lab(25.75, 30.95, -57.86)
CIE-LCH	lch(25.75, 65.61, 298.14°)
OKLab	oklab(37.21% -0.0076 -0.1676)
OKLCH	oklch(37.21% 0.168 267.4)
XYZ	xyz(7.1343, 4.6632, 29.7962)
Luminance	0.0466 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B3197 #97811B

analogous

#1B6F97 #1B3197 #431B97

triadic

#1B3197 #971B31 #31971B

tetradic

#1B3197 #971B6F #97811B #1B9743

square

#1B3197 #971B6F #97811B #1B9743

split-complementary

#1B3197 #97431B #6F971B

monochromatic

#080F2F #122063 #1B3197 #2442CB #4D67DF

Accessibility & contrast

On white

10.87

#1B3197 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.93

#1B3197 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B3197

10.87:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B3197	#FFFFFF	#000000	##FFFFFF
##1B3197	1.00	10.87	1.93	10.87
#FFFFFF	10.87	1.00	21.00	1.00
#000000	1.93	21.00	1.00	21.00
##FFFFFF	10.87	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00439A

Deuteranopia (green-blind)

#003795

Tritanopia (blue-blind)

#004D5F

Achromatopsia (no color)

#3D3D3D

Design tokens & code

CSS

--color: #1b3197;
/* rgb */ color: rgb(27, 49, 151);
/* oklch */ color: oklch(37.2% 0.168 267.4);

Tailwind

colors: {
  custom: {
    50: '#6f69b7',
    500: '#1b3197',
    950: '#000000',
  },
}

SCSS

$custom: #1b3197;
$custom-light: #6f69b7;
$custom-dark: #000000;

JSON

{
  "hex": "#1b3197",
  "rgb": {
    "r": 27,
    "g": 49,
    "b": 151
  },
  "hsl": {
    "h": 229.355,
    "s": 69.663,
    "l": 34.902
  },
  "oklch": {
    "l": 0.37214,
    "c": 0.16774,
    "h": 267.4
  },
  "luminance": 0.04664
}

Semantic roles & 50–950 ramp

primary

#1B3197

secondary

#C1AD4C

accent

#CD3BEC

background

#F7F6FB

surface

#EDEBF6

border

#C8C6D0

text

#090611

muted

#7B7A80

Preview Lab

Preview with #1B3197

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

Preview Lab → · Contrast checker → · Palette generator →