#1B137C#1B137C

#1B137C is a dark, vivid blue. Relative luminance 0.022; OKLCH L 29.6% C 0.164 H 273.2°. Best body text is #FFFFFF at 14.68:1 contrast (WCAG AA passes).

Color values

HEX	#1B137C
RGB	rgb(27, 19, 124)
HSL	hsl(245, 73%, 28%)
HSV	hsv(245, 85%, 49%)
CMYK	cmyk(78.2%, 84.7%, 0%, 51.4%)
CIE-LAB	lab(16.27, 39.35, -56.61)
CIE-LCH	lch(16.27, 68.95, 304.80°)
OKLab	oklab(29.56% 0.0092 -0.1638)
OKLCH	oklch(29.56% 0.164 273.2)
XYZ	xyz(4.3217, 2.1535, 19.2528)
Luminance	0.0215 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B137C #747C13

analogous

#13407C #1B137C #4F137C

triadic

#1B137C #7C1B13 #137C1B

tetradic

#1B137C #7C1340 #747C13 #137C4F

square

#1B137C #7C1340 #747C13 #137C4F

split-complementary

#1B137C #7C4F13 #407C13

monochromatic

#06041B #0F0B47 #1B137C #271BB1 #392BDF

Accessibility & contrast

On white

14.68

#1B137C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.43

#1B137C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B137C

14.68:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B137C	#FFFFFF	#000000	##FFFFFF
##1B137C	1.00	14.68	1.43	14.68
#FFFFFF	14.68	1.00	21.00	1.00
#000000	1.43	21.00	1.00	21.00
##FFFFFF	14.68	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002D7F

Deuteranopia (green-blind)

#00237A

Tritanopia (blue-blind)

#003449

Achromatopsia (no color)

#282828

Design tokens & code

CSS

--color: #1b137c;
/* rgb */ color: rgb(27, 19, 124);
/* oklch */ color: oklch(29.6% 0.164 273.2);

Tailwind

colors: {
  custom: {
    50: '#6a54a3',
    500: '#1b137c',
    950: '#000000',
  },
}

SCSS

$custom: #1b137c;
$custom-light: #6a54a3;
$custom-dark: #000000;

JSON

{
  "hex": "#1b137c",
  "rgb": {
    "r": 27,
    "g": 19,
    "b": 124
  },
  "hsl": {
    "h": 244.571,
    "s": 73.427,
    "l": 28.039
  },
  "oklch": {
    "l": 0.29561,
    "c": 0.16402,
    "h": 273.2
  },
  "luminance": 0.02154
}

Semantic roles & 50–950 ramp

primary

#1B137C

secondary

#A9B239

accent

#F038E2

background

#F6F5FA

surface

#ECE9F4

border

#C7C5CE

text

#08030F

muted

#7A787F

Preview Lab

Preview with #1B137C

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

Preview Lab → · Contrast checker → · Palette generator →