#1F189E#1F189E

#1F189E is a dark, vivid blue. Relative luminance 0.034; OKLCH L 34.6% C 0.200 H 271.2°. Best body text is #FFFFFF at 12.48:1 contrast (WCAG AA passes).

Color values

HEX	#1F189E
RGB	rgb(31, 24, 158)
HSL	hsl(243, 74%, 36%)
HSV	hsv(243, 85%, 62%)
CMYK	cmyk(80.4%, 84.8%, 0%, 38%)
CIE-LAB	lab(21.63, 48.02, -68.96)
CIE-LCH	lch(21.63, 84.03, 304.85°)
OKLab	oklab(34.56% 0.0041 -0.1995)
OKLCH	oklch(34.56% 0.2 271.2)
XYZ	xyz(7.0612, 3.4124, 32.6276)
Luminance	0.0341 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F189E #979E18

analogous

#18549E #1F189E #62189E

triadic

#1F189E #9E1F18 #189E1F

tetradic

#1F189E #9E1854 #979E18 #189E62

square

#1F189E #9E1854 #979E18 #189E62

split-complementary

#1F189E #9E6218 #549E18

monochromatic

#0A0834 #151069 #1F189E #2920D3 #544DE4

Accessibility & contrast

On white

12.48

#1F189E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.68

#1F189E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F189E

12.48:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F189E	#FFFFFF	#000000	##FFFFFF
##1F189E	1.00	12.48	1.68	12.48
#FFFFFF	12.48	1.00	21.00	1.00
#000000	1.68	21.00	1.00	21.00
##FFFFFF	12.48	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003AA2

Deuteranopia (green-blind)

#002D9C

Tritanopia (blue-blind)

#00445D

Achromatopsia (no color)

#343434

Design tokens & code

CSS

--color: #1f189e;
/* rgb */ color: rgb(31, 24, 158);
/* oklch */ color: oklch(34.6% 0.200 271.2);

Tailwind

colors: {
  custom: {
    50: '#745abc',
    500: '#1f189e',
    950: '#000000',
  },
}

SCSS

$custom: #1f189e;
$custom-light: #745abc;
$custom-dark: #000000;

JSON

{
  "hex": "#1f189e",
  "rgb": {
    "r": 31,
    "g": 24,
    "b": 158
  },
  "hsl": {
    "h": 243.134,
    "s": 73.626,
    "l": 35.686
  },
  "oklch": {
    "l": 0.34559,
    "c": 0.19959,
    "h": 271.2
  },
  "luminance": 0.03413
}

Semantic roles & 50–950 ramp

primary

#1F189E

secondary

#BFC64C

accent

#F038E7

background

#F7F5FB

surface

#EEE9F7

border

#C9C5D0

text

#0A0412

muted

#7C7981

Preview Lab

Preview with #1F189E

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

Preview Lab → · Contrast checker → · Palette generator →