#1B397A#1B397A

#1B397A is a dark, moderate blue. Relative luminance 0.046; OKLCH L 36.2% C 0.117 H 263.2°. Best body text is #FFFFFF at 10.98:1 contrast (WCAG AA passes).

Color values

HEX	#1B397A
RGB	rgb(27, 57, 122)
HSL	hsl(221, 64%, 29%)
HSV	hsv(221, 78%, 48%)
CMYK	cmyk(77.9%, 53.3%, 0%, 52.2%)
CIE-LAB	lab(25.45, 13.85, -40.30)
CIE-LCH	lch(25.45, 42.61, 288.97°)
OKLab	oklab(36.22% -0.0139 -0.1159)
OKLCH	oklch(36.22% 0.117 263.2)
XYZ	xyz(5.4267, 4.5638, 19.0035)
Luminance	0.0456 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B397A #7A5C1B

analogous

#1B697A #1B397A #2D1B7A

triadic

#1B397A #7A1B39 #397A1B

tetradic

#1B397A #7A1B69 #7A5C1B #1B7A2D

square

#1B397A #7A1B69 #7A5C1B #1B7A2D

split-complementary

#1B397A #7A2D1B #697A1B

monochromatic

#060C19 #102248 #1B397A #2650AC #3C6CD4

Accessibility & contrast

On white

10.98

#1B397A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.91

#1B397A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B397A

10.98:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B397A	#FFFFFF	#000000	##FFFFFF
##1B397A	1.00	10.98	1.91	10.98
#FFFFFF	10.98	1.00	21.00	1.00
#000000	1.91	21.00	1.00	21.00
##FFFFFF	10.98	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0F417C

Deuteranopia (green-blind)

#003879

Tritanopia (blue-blind)

#004953

Achromatopsia (no color)

#3C3C3C

Design tokens & code

CSS

--color: #1b397a;
/* rgb */ color: rgb(27, 57, 122);
/* oklch */ color: oklch(36.2% 0.117 263.2);

Tailwind

colors: {
  custom: {
    50: '#666ea1',
    500: '#1b397a',
    950: '#000000',
  },
}

SCSS

$custom: #1b397a;
$custom-light: #666ea1;
$custom-dark: #000000;

JSON

{
  "hex": "#1b397a",
  "rgb": {
    "r": 27,
    "g": 57,
    "b": 122
  },
  "hsl": {
    "h": 221.053,
    "s": 63.758,
    "l": 29.216
  },
  "oklch": {
    "l": 0.36216,
    "c": 0.11676,
    "h": 263.2
  },
  "luminance": 0.04564
}

Semantic roles & 50–950 ramp

primary

#1B397A

secondary

#AE8C43

accent

#B241E7

background

#F6F6FA

surface

#EBEBF3

border

#C6C6CD

text

#07070F

muted

#7A7A7F

Preview Lab

Preview with #1B397A

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

Preview Lab → · Contrast checker → · Palette generator →