#1F18C9#1F18C9

#1F18C9 is a dark, highly saturated blue. Relative luminance 0.052; OKLCH L 39.9% C 0.247 H 268.6°. Best body text is #FFFFFF at 10.33:1 contrast (WCAG AA passes).

Color values

HEX	#1F18C9
RGB	rgb(31, 24, 201)
HSL	hsl(242, 79%, 44%)
HSV	hsv(242, 88%, 79%)
CMYK	cmyk(84.6%, 88.1%, 0%, 21.2%)
CIE-LAB	lab(27.19, 60.65, -85.44)
CIE-LCH	lch(27.19, 104.78, 305.37°)
OKLab	oklab(39.93% -0.0058 -0.2471)
OKLCH	oklch(39.93% 0.247 268.6)
XYZ	xyz(11.4307, 5.1602, 55.6406)
Luminance	0.0516 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F18C9 #C2C918

analogous

#186AC9 #1F18C9 #7818C9

triadic

#1F18C9 #C91F18 #18C91F

tetradic

#1F18C9 #C9186A #C2C918 #18C978

square

#1F18C9 #C9186A #C2C918 #18C978

split-complementary

#1F18C9 #C97818 #6AC918

monochromatic

#0E0B5C #171192 #1F18C9 #3E37E7 #736EEE

Accessibility & contrast

On white

10.33

#1F18C9 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.03

#1F18C9 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F18C9

10.33:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F18C9	#FFFFFF	#000000	##FFFFFF
##1F18C9	1.00	10.33	2.03	10.33
#FFFFFF	10.33	1.00	21.00	1.00
#000000	2.03	21.00	1.00	21.00
##FFFFFF	10.33	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0049CE

Deuteranopia (green-blind)

#0037C6

Tritanopia (blue-blind)

#005677

Achromatopsia (no color)

#404040

Design tokens & code

CSS

--color: #1f18c9;
/* rgb */ color: rgb(31, 24, 201);
/* oklch */ color: oklch(39.9% 0.247 268.6);

Tailwind

colors: {
  custom: {
    50: '#7f5edb',
    500: '#1f18c9',
    950: '#000000',
  },
}

SCSS

$custom: #1f18c9;
$custom-light: #7f5edb;
$custom-dark: #000000;

JSON

{
  "hex": "#1f18c9",
  "rgb": {
    "r": 31,
    "g": 24,
    "b": 201
  },
  "hsl": {
    "h": 242.373,
    "s": 78.667,
    "l": 44.118
  },
  "oklch": {
    "l": 0.39933,
    "c": 0.24721,
    "h": 268.6
  },
  "luminance": 0.05162
}

Semantic roles & 50–950 ramp

primary

#1F18C9

secondary

#CFD469

accent

#F533ED

background

#F8F5FD

surface

#F0EAFB

border

#CBC6D4

text

#0D0515

muted

#7D7983

Preview Lab

Preview with #1F18C9

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

Preview Lab → · Contrast checker → · Palette generator →