#1F189B#1F189B

#1F189B is a dark, vivid blue. Relative luminance 0.033; OKLCH L 34.2% C 0.196 H 271.4°. Best body text is #FFFFFF at 12.63:1 contrast (WCAG AA passes).

Color values

HEX	#1F189B
RGB	rgb(31, 24, 155)
HSL	hsl(243, 73%, 35%)
HSV	hsv(243, 85%, 61%)
CMYK	cmyk(80%, 84.5%, 0%, 39.2%)
CIE-LAB	lab(21.25, 47.08, -67.75)
CIE-LCH	lch(21.25, 82.51, 304.80°)
OKLab	oklab(34.19% 0.0049 -0.196)
OKLCH	oklch(34.19% 0.196 271.4)
XYZ	xyz(6.8061, 3.3104, 31.2842)
Luminance	0.0331 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F189B #949B18

analogous

#18539B #1F189B #60189B

triadic

#1F189B #9B1F18 #189B1F

tetradic

#1F189B #9B1853 #949B18 #189B60

square

#1F189B #9B1853 #949B18 #189B60

split-complementary

#1F189B #9B6018 #539B18

monochromatic

#0A0831 #141066 #1F189B #2A20D0 #534AE3

Accessibility & contrast

On white

12.63

#1F189B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.66

#1F189B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F189B

12.63:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F189B	#FFFFFF	#000000	##FFFFFF
##1F189B	1.00	12.63	1.66	12.63
#FFFFFF	12.63	1.00	21.00	1.00
#000000	1.66	21.00	1.00	21.00
##FFFFFF	12.63	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00399F

Deuteranopia (green-blind)

#002C99

Tritanopia (blue-blind)

#00435C

Achromatopsia (no color)

#333333

Design tokens & code

CSS

--color: #1f189b;
/* rgb */ color: rgb(31, 24, 155);
/* oklch */ color: oklch(34.2% 0.196 271.4);

Tailwind

colors: {
  custom: {
    50: '#735aba',
    500: '#1f189b',
    950: '#000000',
  },
}

SCSS

$custom: #1f189b;
$custom-light: #735aba;
$custom-dark: #000000;

JSON

{
  "hex": "#1f189b",
  "rgb": {
    "r": 31,
    "g": 24,
    "b": 155
  },
  "hsl": {
    "h": 243.206,
    "s": 73.184,
    "l": 35.098
  },
  "oklch": {
    "l": 0.34189,
    "c": 0.19611,
    "h": 271.4
  },
  "luminance": 0.03311
}

Semantic roles & 50–950 ramp

primary

#1F189B

secondary

#BEC54A

accent

#F038E6

background

#F7F5FB

surface

#EEE9F6

border

#C9C5D0

text

#0A0412

muted

#7C7981

Preview Lab

Preview with #1F189B

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

Preview Lab → · Contrast checker → · Palette generator →