#1B185B#1B185B

#1B185B is a dark, moderate blue. Relative luminance 0.016; OKLCH L 26.5% C 0.115 H 277.0°. Best body text is #FFFFFF at 15.81:1 contrast (WCAG AA passes).

Color values

HEX	#1B185B
RGB	rgb(27, 24, 91)
HSL	hsl(243, 58%, 23%)
HSV	hsv(243, 74%, 36%)
CMYK	cmyk(70.3%, 73.6%, 0%, 64.3%)
CIE-LAB	lab(13.48, 24.85, -39.62)
CIE-LCH	lch(13.48, 46.77, 302.10°)
OKLab	oklab(26.46% 0.0141 -0.1144)
OKLCH	oklch(26.46% 0.115 277)
XYZ	xyz(2.6663, 1.6414, 10.0718)
Luminance	0.0164 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B185B #585B18

analogous

#18365B #1B185B #3D185B

triadic

#1B185B #5B1B18 #185B1B

tetradic

#1B185B #5B1836 #585B18 #185B3D

square

#1B185B #5B1836 #585B18 #185B3D

split-complementary

#1B185B #5B3D18 #365B18

monochromatic

#070618 #0D0B2B #1B185B #29258B #3832BC

Accessibility & contrast

On white

15.81

#1B185B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.33

#1B185B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B185B

15.81:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B185B	#FFFFFF	#000000	##FFFFFF
##1B185B	1.00	15.81	1.33	15.81
#FFFFFF	15.81	1.00	21.00	1.00
#000000	1.33	21.00	1.00	21.00
##FFFFFF	15.81	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00255D

Deuteranopia (green-blind)

#00205A

Tritanopia (blue-blind)

#002A37

Achromatopsia (no color)

#232323

Design tokens & code

CSS

--color: #1b185b;
/* rgb */ color: rgb(27, 24, 91);
/* oklch */ color: oklch(26.5% 0.115 277.0);

Tailwind

colors: {
  custom: {
    50: '#61558a',
    500: '#1b185b',
    950: '#000000',
  },
}

SCSS

$custom: #1b185b;
$custom-light: #61558a;
$custom-dark: #000000;

JSON

{
  "hex": "#1b185b",
  "rgb": {
    "r": 27,
    "g": 24,
    "b": 91
  },
  "hsl": {
    "h": 242.687,
    "s": 58.261,
    "l": 22.549
  },
  "oklch": {
    "l": 0.26461,
    "c": 0.11522,
    "h": 277
  },
  "luminance": 0.01642
}

Semantic roles & 50–950 ramp

primary

#1B185B

secondary

#8E923D

accent

#E146DB

background

#F6F5F8

surface

#EBE8F0

border

#C6C4CB

text

#05030C

muted

#7A787D

Preview Lab

Preview with #1B185B

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

Preview Lab → · Contrast checker → · Palette generator →