#1B187C#1B187C

#1B187C is a dark, vivid blue. Relative luminance 0.023; OKLCH L 30.2% C 0.160 H 272.6°. Best body text is #FFFFFF at 14.30:1 contrast (WCAG AA passes).

Color values

HEX	#1B187C
RGB	rgb(27, 24, 124)
HSL	hsl(242, 68%, 29%)
HSV	hsv(242, 81%, 49%)
CMYK	cmyk(78.2%, 80.6%, 0%, 51.4%)
CIE-LAB	lab(17.18, 36.71, -55.10)
CIE-LCH	lch(17.18, 66.21, 303.67°)
OKLab	oklab(30.2% 0.0074 -0.1595)
OKLCH	oklch(30.2% 0.16 272.6)
XYZ	xyz(4.4155, 2.3410, 19.2840)
Luminance	0.0234 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B187C #797C18

analogous

#18477C #1B187C #4D187C

triadic

#1B187C #7C1B18 #187C1B

tetradic

#1B187C #7C1847 #797C18 #187C4D

square

#1B187C #7C1847 #797C18 #187C4D

split-complementary

#1B187C #7C4D18 #477C18

monochromatic

#06051A #100E49 #1B187C #2622AF #3B36D8

Accessibility & contrast

On white

14.30

#1B187C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.47

#1B187C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B187C

14.30:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B187C	#FFFFFF	#000000	##FFFFFF
##1B187C	1.00	14.30	1.47	14.30
#FFFFFF	14.30	1.00	21.00	1.00
#000000	1.47	21.00	1.00	21.00
##FFFFFF	14.30	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002F7F

Deuteranopia (green-blind)

#00257A

Tritanopia (blue-blind)

#00364A

Achromatopsia (no color)

#2A2A2A

Design tokens & code

CSS

--color: #1b187c;
/* rgb */ color: rgb(27, 24, 124);
/* oklch */ color: oklch(30.2% 0.160 272.6);

Tailwind

colors: {
  custom: {
    50: '#6a57a3',
    500: '#1b187c',
    950: '#000000',
  },
}

SCSS

$custom: #1b187c;
$custom-light: #6a57a3;
$custom-dark: #000000;

JSON

{
  "hex": "#1b187c",
  "rgb": {
    "r": 27,
    "g": 24,
    "b": 124
  },
  "hsl": {
    "h": 241.8,
    "s": 67.568,
    "l": 29.02
  },
  "oklch": {
    "l": 0.30196,
    "c": 0.15964,
    "h": 272.6
  },
  "luminance": 0.02342
}

Semantic roles & 50–950 ramp

primary

#1B187C

secondary

#ADB13F

accent

#EA3DE5

background

#F6F5FA

surface

#ECE9F4

border

#C7C5CE

text

#08030F

muted

#7A787F

Preview Lab

Preview with #1B187C

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

Preview Lab → · Contrast checker → · Palette generator →