#1F18A0#1F18A0

#1F18A0 is a dark, highly saturated blue. Relative luminance 0.035; OKLCH L 34.8% C 0.202 H 271.0°. Best body text is #FFFFFF at 12.38:1 contrast (WCAG AA passes).

Color values

HEX	#1F18A0
RGB	rgb(31, 24, 160)
HSL	hsl(243, 74%, 36%)
HSV	hsv(243, 85%, 63%)
CMYK	cmyk(80.6%, 85%, 0%, 37.3%)
CIE-LAB	lab(21.88, 48.63, -69.77)
CIE-LCH	lch(21.88, 85.04, 304.88°)
OKLab	oklab(34.81% 0.0036 -0.2019)
OKLCH	oklch(34.81% 0.202 271)
XYZ	xyz(7.2347, 3.4818, 33.5416)
Luminance	0.0348 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F18A0 #99A018

analogous

#1855A0 #1F18A0 #6318A0

triadic

#1F18A0 #A01F18 #18A01F

tetradic

#1F18A0 #A01855 #99A018 #18A063

square

#1F18A0 #A01855 #99A018 #18A063

split-complementary

#1F18A0 #A06318 #55A018

monochromatic

#0A0836 #15106B #1F18A0 #2920D5 #564EE4

Accessibility & contrast

On white

12.38

#1F18A0 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.70

#1F18A0 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F18A0

12.38:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F18A0	#FFFFFF	#000000	##FFFFFF
##1F18A0	1.00	12.38	1.70	12.38
#FFFFFF	12.38	1.00	21.00	1.00
#000000	1.70	21.00	1.00	21.00
##FFFFFF	12.38	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003BA4

Deuteranopia (green-blind)

#002D9E

Tritanopia (blue-blind)

#00455F

Achromatopsia (no color)

#343434

Design tokens & code

CSS

--color: #1f18a0;
/* rgb */ color: rgb(31, 24, 160);
/* oklch */ color: oklch(34.8% 0.202 271.0);

Tailwind

colors: {
  custom: {
    50: '#755abe',
    500: '#1f18a0',
    950: '#000000',
  },
}

SCSS

$custom: #1f18a0;
$custom-light: #755abe;
$custom-dark: #000000;

JSON

{
  "hex": "#1f18a0",
  "rgb": {
    "r": 31,
    "g": 24,
    "b": 160
  },
  "hsl": {
    "h": 243.088,
    "s": 73.913,
    "l": 36.078
  },
  "oklch": {
    "l": 0.34805,
    "c": 0.2019,
    "h": 271
  },
  "luminance": 0.03483
}

Semantic roles & 50–950 ramp

primary

#1F18A0

secondary

#C0C64D

accent

#F137E7

background

#F7F5FB

surface

#EEE9F7

border

#C9C5D0

text

#0A0412

muted

#7C7981

Preview Lab

Preview with #1F18A0

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

Preview Lab → · Contrast checker → · Palette generator →