#1B188E#1B188E

#1B188E is a dark, vivid blue. Relative luminance 0.028; OKLCH L 32.4% C 0.182 H 271.0°. Best body text is #FFFFFF at 13.39:1 contrast (WCAG AA passes).

Color values

HEX	#1B188E
RGB	rgb(27, 24, 142)
HSL	hsl(242, 71%, 33%)
HSV	hsv(242, 83%, 56%)
CMYK	cmyk(81%, 83.1%, 0%, 44.3%)
CIE-LAB	lab(19.39, 42.72, -62.81)
CIE-LCH	lch(19.39, 75.96, 304.22°)
OKLab	oklab(32.37% 0.0032 -0.1818)
OKLCH	oklch(32.37% 0.182 271)
XYZ	xyz(5.6595, 2.8386, 25.8356)
Luminance	0.0284 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B188E #8B8E18

analogous

#18508E #1B188E #56188E

triadic

#1B188E #8E1B18 #188E1B

tetradic

#1B188E #8E1850 #8B8E18 #188E56

square

#1B188E #8E1850 #8B8E18 #188E56

split-complementary

#1B188E #8E5618 #508E18

monochromatic

#070625 #110F5A #1B188E #2521C2 #4541DF

Accessibility & contrast

On white

13.39

#1B188E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.57

#1B188E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B188E

13.39:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B188E	#FFFFFF	#000000	##FFFFFF
##1B188E	1.00	13.39	1.57	13.39
#FFFFFF	13.39	1.00	21.00	1.00
#000000	1.57	21.00	1.00	21.00
##FFFFFF	13.39	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003591

Deuteranopia (green-blind)

#00298C

Tritanopia (blue-blind)

#003E54

Achromatopsia (no color)

#2F2F2F

Design tokens & code

CSS

--color: #1b188e;
/* rgb */ color: rgb(27, 24, 142);
/* oklch */ color: oklch(32.4% 0.182 271.0);

Tailwind

colors: {
  custom: {
    50: '#6f58b0',
    500: '#1b188e',
    950: '#000000',
  },
}

SCSS

$custom: #1b188e;
$custom-light: #6f58b0;
$custom-dark: #000000;

JSON

{
  "hex": "#1b188e",
  "rgb": {
    "r": 27,
    "g": 24,
    "b": 142
  },
  "hsl": {
    "h": 241.525,
    "s": 71.084,
    "l": 32.549
  },
  "oklch": {
    "l": 0.32372,
    "c": 0.18183,
    "h": 271
  },
  "luminance": 0.02839
}

Semantic roles & 50–950 ramp

primary

#1B188E

secondary

#BCC042

accent

#EE3AE9

background

#F7F5FB

surface

#EDE9F6

border

#C8C5D0

text

#090311

muted

#7B7880

Preview Lab

Preview with #1B188E

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

Preview Lab → · Contrast checker → · Palette generator →