#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
RGBrgb(27, 41, 123)
HSLhsl(231, 64%, 29%)
HSVhsv(231, 78%, 48%)
CMYKcmyk(78%, 66.7%, 0%, 51.8%)
CIE-LABlab(21.01, 25.52, -48.16)
CIE-LCHlch(21.01, 54.50, 297.92°)
OKLaboklab(32.92% -0.0015 -0.1393)
OKLCHoklch(32.92% 0.139 269.4)
XYZxyz(4.8189, 3.2484, 19.1081)
Luminance0.0325 (WCAG relative)
Temperaturecool
Familyblue

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
##1B297B1.0012.731.6512.73
#FFFFFF12.731.0021.001.00
#0000001.6521.001.0021.00
##FFFFFF12.731.0021.001.00

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 →

#1B297B Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva