#1D188F#1D188F

#1D188F is a dark, vivid blue. Relative luminance 0.029; OKLCH L 32.6% C 0.182 H 271.7°. Best body text is #FFFFFF at 13.29:1 contrast (WCAG AA passes).

Color values

HEX	#1D188F
RGB	rgb(29, 24, 143)
HSL	hsl(243, 71%, 33%)
HSV	hsv(243, 83%, 56%)
CMYK	cmyk(79.7%, 83.2%, 0%, 43.9%)
CIE-LAB	lab(19.63, 43.17, -63.03)
CIE-LCH	lch(19.63, 76.39, 304.41°)
OKLab	oklab(32.61% 0.0054 -0.1824)
OKLCH	oklch(32.61% 0.182 271.7)
XYZ	xyz(5.7896, 2.8970, 26.2353)
Luminance	0.0290 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D188F #8A8F18

analogous

#184E8F #1D188F #58188F

triadic

#1D188F #8F1D18 #188F1D

tetradic

#1D188F #8F184E #8A8F18 #188F58

square

#1D188F #8F184E #8A8F18 #188F58

split-complementary

#1D188F #8F5818 #4E8F18

monochromatic

#080626 #120F5B #1D188F #2821C3 #4942DF

Accessibility & contrast

On white

13.29

#1D188F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.58

#1D188F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D188F

13.29:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D188F	#FFFFFF	#000000	##FFFFFF
##1D188F	1.00	13.29	1.58	13.29
#FFFFFF	13.29	1.00	21.00	1.00
#000000	1.58	21.00	1.00	21.00
##FFFFFF	13.29	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003592

Deuteranopia (green-blind)

#00298D

Tritanopia (blue-blind)

#003E55

Achromatopsia (no color)

#2F2F2F

Design tokens & code

CSS

--color: #1d188f;
/* rgb */ color: rgb(29, 24, 143);
/* oklch */ color: oklch(32.6% 0.182 271.7);

Tailwind

colors: {
  custom: {
    50: '#7058b1',
    500: '#1d188f',
    950: '#000000',
  },
}

SCSS

$custom: #1d188f;
$custom-light: #7058b1;
$custom-dark: #000000;

JSON

{
  "hex": "#1d188f",
  "rgb": {
    "r": 29,
    "g": 24,
    "b": 143
  },
  "hsl": {
    "h": 242.521,
    "s": 71.257,
    "l": 32.745
  },
  "oklch": {
    "l": 0.32606,
    "c": 0.18248,
    "h": 271.7
  },
  "luminance": 0.02898
}

Semantic roles & 50–950 ramp

primary

#1D188F

secondary

#BBC043

accent

#EE3AE6

background

#F7F5FB

surface

#EDE9F6

border

#C8C5D0

text

#090411

muted

#7B7980

Preview Lab

Preview with #1D188F

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

Preview Lab → · Contrast checker → · Palette generator →