#1B2377#1B2377

#1B2377 is a dark, vivid blue. Relative luminance 0.028; OKLCH L 31.4% C 0.141 H 271.1°. Best body text is #FFFFFF at 13.52:1 contrast (WCAG AA passes).

Color values

HEX	#1B2377
RGB	rgb(27, 35, 119)
HSL	hsl(235, 63%, 29%)
HSV	hsv(235, 77%, 47%)
CMYK	cmyk(77.3%, 70.6%, 0%, 53.3%)
CIE-LAB	lab(19.08, 28.06, -48.77)
CIE-LCH	lch(19.08, 56.27, 299.91°)
OKLab	oklab(31.39% 0.0027 -0.1411)
OKLCH	oklch(31.39% 0.141 271.1)
XYZ	xyz(4.3817, 2.7665, 17.7523)
Luminance	0.0277 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B2377 #776F1B

analogous

#1B5177 #1B2377 #411B77

triadic

#1B2377 #771B23 #23771B

tetradic

#1B2377 #771B51 #776F1B #1B7741

square

#1B2377 #771B51 #776F1B #1B7741

split-complementary

#1B2377 #77411B #51771B

monochromatic

#060719 #101445 #1B2377 #2632A9 #3A47D2

Accessibility & contrast

On white

13.52

#1B2377 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.55

#1B2377 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B2377

13.52:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B2377	#FFFFFF	#000000	##FFFFFF
##1B2377	1.00	13.52	1.55	13.52
#FFFFFF	13.52	1.00	21.00	1.00
#000000	1.55	21.00	1.00	21.00
##FFFFFF	13.52	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00337A

Deuteranopia (green-blind)

#002A75

Tritanopia (blue-blind)

#003A4A

Achromatopsia (no color)

#2E2E2E

Design tokens & code

CSS

--color: #1b2377;
/* rgb */ color: rgb(27, 35, 119);
/* oklch */ color: oklch(31.4% 0.141 271.1);

Tailwind

colors: {
  custom: {
    50: '#675e9f',
    500: '#1b2377',
    950: '#000000',
  },
}

SCSS

$custom: #1b2377;
$custom-light: #675e9f;
$custom-dark: #000000;

JSON

{
  "hex": "#1b2377",
  "rgb": {
    "r": 27,
    "g": 35,
    "b": 119
  },
  "hsl": {
    "h": 234.783,
    "s": 63.014,
    "l": 28.627
  },
  "oklch": {
    "l": 0.31388,
    "c": 0.14111,
    "h": 271.1
  },
  "luminance": 0.02767
}

Semantic roles & 50–950 ramp

primary

#1B2377

secondary

#ABA242

accent

#D842E6

background

#F6F5F9

surface

#EBE9F2

border

#C6C5CC

text

#07040F

muted

#7A797E

Preview Lab

Preview with #1B2377

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

Preview Lab → · Contrast checker → · Palette generator →