#1B297B#1B297B

#1B297B is a dark, vivid blue. Relative luminance 0.032; OKLCH L 32.9% C 0.139 H 269.4°. Best body text is #FFFFFF at 12.73:1 contrast (WCAG AA passes).

Color values

HEX	#1B297B
RGB	rgb(27, 41, 123)
HSL	hsl(231, 64%, 29%)
HSV	hsv(231, 78%, 48%)
CMYK	cmyk(78%, 66.7%, 0%, 51.8%)
CIE-LAB	lab(21.01, 25.52, -48.16)
CIE-LCH	lch(21.01, 54.50, 297.92°)
OKLab	oklab(32.92% -0.0015 -0.1393)
OKLCH	oklch(32.92% 0.139 269.4)
XYZ	xyz(4.8189, 3.2484, 19.1081)
Luminance	0.0325 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B297B #7B6D1B

analogous

#1B597B #1B297B #3D1B7B

triadic

#1B297B #7B1B29 #297B1B

tetradic

#1B297B #7B1B59 #7B6D1B #1B7B3D

square

#1B297B #7B1B59 #7B6D1B #1B7B3D

split-complementary

#1B297B #7B3D1B #597B1B

monochromatic

#060819 #101849 #1B297B #263AAD #3C52D4

Accessibility & contrast

On white

12.73

#1B297B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.65

#1B297B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B297B

12.73:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B297B	#FFFFFF	#000000	##FFFFFF
##1B297B	1.00	12.73	1.65	12.73
#FFFFFF	12.73	1.00	21.00	1.00
#000000	1.65	21.00	1.00	21.00
##FFFFFF	12.73	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00377E

Deuteranopia (green-blind)

#002E79

Tritanopia (blue-blind)

#003F4E

Achromatopsia (no color)

#323232

Design tokens & code

CSS

--color: #1b297b;
/* rgb */ color: rgb(27, 41, 123);
/* oklch */ color: oklch(32.9% 0.139 269.4);

Tailwind

colors: {
  custom: {
    50: '#6862a2',
    500: '#1b297b',
    950: '#000000',
  },
}

SCSS

$custom: #1b297b;
$custom-light: #6862a2;
$custom-dark: #000000;

JSON

{
  "hex": "#1b297b",
  "rgb": {
    "r": 27,
    "g": 41,
    "b": 123
  },
  "hsl": {
    "h": 231.25,
    "s": 64,
    "l": 29.412
  },
  "oklch": {
    "l": 0.32916,
    "c": 0.13927,
    "h": 269.4
  },
  "luminance": 0.03249
}

Semantic roles & 50–950 ramp

primary

#1B297B

secondary

#AF9F43

accent

#CF41E7

background

#F6F5FA

surface

#ECEAF4

border

#C7C6CE

text

#07050F

muted

#7A797F

Preview Lab

Preview with #1B297B

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

Preview Lab → · Contrast checker → · Palette generator →