#1B137B#1B137B

#1B137B is a dark, vivid blue. Relative luminance 0.021; OKLCH L 29.4% C 0.163 H 273.3°. Best body text is #FFFFFF at 14.73:1 contrast (WCAG AA passes).

Color values

HEX	#1B137B
RGB	rgb(27, 19, 123)
HSL	hsl(245, 73%, 28%)
HSV	hsv(245, 85%, 48%)
CMYK	cmyk(78%, 84.6%, 0%, 51.8%)
CIE-LAB	lab(16.15, 39.03, -56.18)
CIE-LCH	lch(16.15, 68.41, 304.78°)
OKLab	oklab(29.44% 0.0094 -0.1625)
OKLCH	oklch(29.44% 0.163 273.3)
XYZ	xyz(4.2588, 2.1284, 18.9214)
Luminance	0.0213 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B137B #737B13

analogous

#133F7B #1B137B #4F137B

triadic

#1B137B #7B1B13 #137B1B

tetradic

#1B137B #7B133F #737B13 #137B4F

square

#1B137B #7B133F #737B13 #137B4F

split-complementary

#1B137B #7B4F13 #3F7B13

monochromatic

#06041B #0F0B46 #1B137B #271BB0 #382ADE

Accessibility & contrast

On white

14.73

#1B137B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.43

#1B137B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B137B

14.73:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B137B	#FFFFFF	#000000	##FFFFFF
##1B137B	1.00	14.73	1.43	14.73
#FFFFFF	14.73	1.00	21.00	1.00
#000000	1.43	21.00	1.00	21.00
##FFFFFF	14.73	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002D7E

Deuteranopia (green-blind)

#002379

Tritanopia (blue-blind)

#003448

Achromatopsia (no color)

#282828

Design tokens & code

CSS

--color: #1b137b;
/* rgb */ color: rgb(27, 19, 123);
/* oklch */ color: oklch(29.4% 0.163 273.3);

Tailwind

colors: {
  custom: {
    50: '#6a54a2',
    500: '#1b137b',
    950: '#000000',
  },
}

SCSS

$custom: #1b137b;
$custom-light: #6a54a2;
$custom-dark: #000000;

JSON

{
  "hex": "#1b137b",
  "rgb": {
    "r": 27,
    "g": 19,
    "b": 123
  },
  "hsl": {
    "h": 244.615,
    "s": 73.239,
    "l": 27.843
  },
  "oklch": {
    "l": 0.29438,
    "c": 0.16279,
    "h": 273.3
  },
  "luminance": 0.02129
}

Semantic roles & 50–950 ramp

primary

#1B137B

secondary

#A8B139

accent

#F038E2

background

#F6F5FA

surface

#ECE8F4

border

#C7C4CE

text

#08030F

muted

#7A787F

Preview Lab

Preview with #1B137B

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

Preview Lab → · Contrast checker → · Palette generator →