#1B3097#1B3097

#1B3097 is a dark, vivid blue. Relative luminance 0.046; OKLCH L 37.0% C 0.169 H 267.6°. Best body text is #FFFFFF at 10.96:1 contrast (WCAG AA passes).

Color values

HEX	#1B3097
RGB	rgb(27, 48, 151)
HSL	hsl(230, 70%, 35%)
HSV	hsv(230, 82%, 59%)
CMYK	cmyk(82.1%, 68.2%, 0%, 40.8%)
CIE-LAB	lab(25.50, 31.61, -58.27)
CIE-LCH	lch(25.50, 66.29, 298.48°)
OKLab	oklab(37.03% -0.0071 -0.1688)
OKLCH	oklch(37.03% 0.169 267.6)
XYZ	xyz(7.0929, 4.5804, 29.7824)
Luminance	0.0458 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B3097 #97821B

analogous

#1B6E97 #1B3097 #441B97

triadic

#1B3097 #971B30 #30971B

tetradic

#1B3097 #971B6E #97821B #1B9744

square

#1B3097 #971B6E #97821B #1B9744

split-complementary

#1B3097 #97441B #6E971B

monochromatic

#080F2F #121F63 #1B3097 #2441CB #4D66DF

Accessibility & contrast

On white

10.96

#1B3097 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.92

#1B3097 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B3097

10.96:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B3097	#FFFFFF	#000000	##FFFFFF
##1B3097	1.00	10.96	1.92	10.96
#FFFFFF	10.96	1.00	21.00	1.00
#000000	1.92	21.00	1.00	21.00
##FFFFFF	10.96	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00429A

Deuteranopia (green-blind)

#003795

Tritanopia (blue-blind)

#004C5F

Achromatopsia (no color)

#3C3C3C

Design tokens & code

CSS

--color: #1b3097;
/* rgb */ color: rgb(27, 48, 151);
/* oklch */ color: oklch(37.0% 0.169 267.6);

Tailwind

colors: {
  custom: {
    50: '#6f68b7',
    500: '#1b3097',
    950: '#000000',
  },
}

SCSS

$custom: #1b3097;
$custom-light: #6f68b7;
$custom-dark: #000000;

JSON

{
  "hex": "#1b3097",
  "rgb": {
    "r": 27,
    "g": 48,
    "b": 151
  },
  "hsl": {
    "h": 229.839,
    "s": 69.663,
    "l": 34.902
  },
  "oklch": {
    "l": 0.37032,
    "c": 0.16892,
    "h": 267.6
  },
  "luminance": 0.04581
}

Semantic roles & 50–950 ramp

primary

#1B3097

secondary

#C1AE4C

accent

#CE3BEC

background

#F7F6FB

surface

#EDEBF6

border

#C8C6D0

text

#090611

muted

#7B7A80

Preview Lab

Preview with #1B3097

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

Preview Lab → · Contrast checker → · Palette generator →