#1B137D#1B137D

#1B137D is a dark, vivid blue. Relative luminance 0.022; OKLCH L 29.7% C 0.165 H 273.1°. Best body text is #FFFFFF at 14.63:1 contrast (WCAG AA passes).

Color values

HEX	#1B137D
RGB	rgb(27, 19, 125)
HSL	hsl(245, 74%, 28%)
HSV	hsv(245, 85%, 49%)
CMYK	cmyk(78.4%, 84.8%, 0%, 51%)
CIE-LAB	lab(16.40, 39.68, -57.04)
CIE-LCH	lch(16.40, 69.48, 304.82°)
OKLab	oklab(29.69% 0.0089 -0.165)
OKLCH	oklch(29.69% 0.165 273.1)
XYZ	xyz(4.3853, 2.1790, 19.5875)
Luminance	0.0218 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B137D #757D13

analogous

#13407D #1B137D #50137D

triadic

#1B137D #7D1B13 #137D1B

tetradic

#1B137D #7D1340 #757D13 #137D50

square

#1B137D #7D1340 #757D13 #137D50

split-complementary

#1B137D #7D5013 #407D13

monochromatic

#06041B #100B48 #1B137D #261BB2 #392CDF

Accessibility & contrast

On white

14.63

#1B137D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.44

#1B137D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B137D

14.63:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B137D	#FFFFFF	#000000	##FFFFFF
##1B137D	1.00	14.63	1.44	14.63
#FFFFFF	14.63	1.00	21.00	1.00
#000000	1.44	21.00	1.00	21.00
##FFFFFF	14.63	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002D80

Deuteranopia (green-blind)

#00237B

Tritanopia (blue-blind)

#003549

Achromatopsia (no color)

#292929

Design tokens & code

CSS

--color: #1b137d;
/* rgb */ color: rgb(27, 19, 125);
/* oklch */ color: oklch(29.7% 0.165 273.1);

Tailwind

colors: {
  custom: {
    50: '#6b54a4',
    500: '#1b137d',
    950: '#000000',
  },
}

SCSS

$custom: #1b137d;
$custom-light: #6b54a4;
$custom-dark: #000000;

JSON

{
  "hex": "#1b137d",
  "rgb": {
    "r": 27,
    "g": 19,
    "b": 125
  },
  "hsl": {
    "h": 244.528,
    "s": 73.611,
    "l": 28.235
  },
  "oklch": {
    "l": 0.29686,
    "c": 0.16524,
    "h": 273.1
  },
  "luminance": 0.02179
}

Semantic roles & 50–950 ramp

primary

#1B137D

secondary

#A9B339

accent

#F038E2

background

#F7F5FA

surface

#EDE9F4

border

#C8C5CE

text

#08030F

muted

#7B787F

Preview Lab

Preview with #1B137D

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

Preview Lab → · Contrast checker → · Palette generator →