#1F188F#1F188F

#1F188F is a dark, vivid blue. Relative luminance 0.029; OKLCH L 32.7% C 0.182 H 272.5°. Best body text is #FFFFFF at 13.24:1 contrast (WCAG AA passes).

Color values

HEX	#1F188F
RGB	rgb(31, 24, 143)
HSL	hsl(244, 71%, 33%)
HSV	hsv(244, 83%, 56%)
CMYK	cmyk(78.3%, 83.2%, 0%, 43.9%)
CIE-LAB	lab(19.75, 43.30, -62.82)
CIE-LCH	lch(19.75, 76.30, 304.58°)
OKLab	oklab(32.72% 0.0079 -0.1818)
OKLCH	oklch(32.72% 0.182 272.5)
XYZ	xyz(5.8480, 2.9271, 26.2381)
Luminance	0.0293 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F188F #888F18

analogous

#184D8F #1F188F #5A188F

triadic

#1F188F #8F1F18 #188F1F

tetradic

#1F188F #8F184D #888F18 #188F5A

square

#1F188F #8F184D #888F18 #188F5A

split-complementary

#1F188F #8F5A18 #4D8F18

monochromatic

#080626 #140F5B #1F188F #2A21C3 #4B42DF

Accessibility & contrast

On white

13.24

#1F188F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.59

#1F188F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F188F

13.24:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F188F	#FFFFFF	#000000	##FFFFFF
##1F188F	1.00	13.24	1.59	13.24
#FFFFFF	13.24	1.00	21.00	1.00
#000000	1.59	21.00	1.00	21.00
##FFFFFF	13.24	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003592

Deuteranopia (green-blind)

#002A8D

Tritanopia (blue-blind)

#003E55

Achromatopsia (no color)

#303030

Design tokens & code

CSS

--color: #1f188f;
/* rgb */ color: rgb(31, 24, 143);
/* oklch */ color: oklch(32.7% 0.182 272.5);

Tailwind

colors: {
  custom: {
    50: '#7059b1',
    500: '#1f188f',
    950: '#000000',
  },
}

SCSS

$custom: #1f188f;
$custom-light: #7059b1;
$custom-dark: #000000;

JSON

{
  "hex": "#1f188f",
  "rgb": {
    "r": 31,
    "g": 24,
    "b": 143
  },
  "hsl": {
    "h": 243.529,
    "s": 71.257,
    "l": 32.745
  },
  "oklch": {
    "l": 0.32724,
    "c": 0.18193,
    "h": 272.5
  },
  "luminance": 0.02928
}

Semantic roles & 50–950 ramp

primary

#1F188F

secondary

#B9C043

accent

#EE3AE3

background

#F7F5FB

surface

#EDE9F6

border

#C8C5D0

text

#090411

muted

#7B7980

Preview Lab

Preview with #1F188F

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

Preview Lab → · Contrast checker → · Palette generator →