#1F188E#1F188E

#1F188E is a dark, vivid blue. Relative luminance 0.029; OKLCH L 32.6% C 0.181 H 272.6°. Best body text is #FFFFFF at 13.29:1 contrast (WCAG AA passes).

Color values

HEX	#1F188E
RGB	rgb(31, 24, 142)
HSL	hsl(244, 71%, 33%)
HSV	hsv(244, 83%, 56%)
CMYK	cmyk(78.2%, 83.1%, 0%, 44.3%)
CIE-LAB	lab(19.63, 42.98, -62.40)
CIE-LCH	lch(19.63, 75.77, 304.56°)
OKLab	oklab(32.6% 0.0081 -0.1805)
OKLCH	oklch(32.6% 0.181 272.6)
XYZ	xyz(5.7726, 2.8969, 25.8409)
Luminance	0.0290 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F188E #878E18

analogous

#184C8E #1F188E #5A188E

triadic

#1F188E #8E1F18 #188E1F

tetradic

#1F188E #8E184C #878E18 #188E5A

square

#1F188E #8E184C #878E18 #188E5A

split-complementary

#1F188E #8E5A18 #4C8E18

monochromatic

#080625 #140F5A #1F188E #2A21C2 #4B41DF

Accessibility & contrast

On white

13.29

#1F188E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.58

#1F188E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F188E

13.29:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F188E	#FFFFFF	#000000	##FFFFFF
##1F188E	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)

#003591

Deuteranopia (green-blind)

#002A8C

Tritanopia (blue-blind)

#003D54

Achromatopsia (no color)

#2F2F2F

Design tokens & code

CSS

--color: #1f188e;
/* rgb */ color: rgb(31, 24, 142);
/* oklch */ color: oklch(32.6% 0.181 272.6);

Tailwind

colors: {
  custom: {
    50: '#7059b0',
    500: '#1f188e',
    950: '#000000',
  },
}

SCSS

$custom: #1f188e;
$custom-light: #7059b0;
$custom-dark: #000000;

JSON

{
  "hex": "#1f188e",
  "rgb": {
    "r": 31,
    "g": 24,
    "b": 142
  },
  "hsl": {
    "h": 243.559,
    "s": 71.084,
    "l": 32.549
  },
  "oklch": {
    "l": 0.32603,
    "c": 0.18073,
    "h": 272.6
  },
  "luminance": 0.02898
}

Semantic roles & 50–950 ramp

primary

#1F188E

secondary

#B8C042

accent

#EE3AE3

background

#F7F5FB

surface

#EDE9F6

border

#C8C5D0

text

#090411

muted

#7B7980

Preview Lab

Preview with #1F188E

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

Preview Lab → · Contrast checker → · Palette generator →