#1B18B3#1B18B3

#1B18B3 is a dark, highly saturated blue. Relative luminance 0.041; OKLCH L 37.0% C 0.224 H 268.7°. Best body text is #FFFFFF at 11.49:1 contrast (WCAG AA passes).

Color values

HEX	#1B18B3
RGB	rgb(27, 24, 179)
HSL	hsl(241, 76%, 40%)
HSV	hsv(241, 87%, 70%)
CMYK	cmyk(84.9%, 86.6%, 0%, 29.8%)
CIE-LAB	lab(24.13, 54.19, -77.51)
CIE-LCH	lch(24.13, 94.57, 304.96°)
OKLab	oklab(36.99% -0.0051 -0.2243)
OKLCH	oklch(36.99% 0.224 268.7)
XYZ	xyz(8.9125, 4.1399, 42.9684)
Luminance	0.0414 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B18B3 #B0B318

analogous

#1863B3 #1B18B3 #6818B3

triadic

#1B18B3 #B31B18 #18B31B

tetradic

#1B18B3 #B31863 #B0B318 #18B368

square

#1B18B3 #B31863 #B0B318 #18B368

split-complementary

#1B18B3 #B36818 #63B318

monochromatic

#0B0A47 #13117D #1B18B3 #2A26E2 #5F5CE9

Accessibility & contrast

On white

11.49

#1B18B3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.83

#1B18B3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B18B3

11.49:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B18B3	#FFFFFF	#000000	##FFFFFF
##1B18B3	1.00	11.49	1.83	11.49
#FFFFFF	11.49	1.00	21.00	1.00
#000000	1.83	21.00	1.00	21.00
##FFFFFF	11.49	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0041B7

Deuteranopia (green-blind)

#0031B1

Tritanopia (blue-blind)

#004D6A

Achromatopsia (no color)

#393939

Design tokens & code

CSS

--color: #1b18b3;
/* rgb */ color: rgb(27, 24, 179);
/* oklch */ color: oklch(37.0% 0.224 268.7);

Tailwind

colors: {
  custom: {
    50: '#795ccb',
    500: '#1b18b3',
    950: '#000000',
  },
}

SCSS

$custom: #1b18b3;
$custom-light: #795ccb;
$custom-dark: #000000;

JSON

{
  "hex": "#1b18b3",
  "rgb": {
    "r": 27,
    "g": 24,
    "b": 179
  },
  "hsl": {
    "h": 241.161,
    "s": 76.355,
    "l": 39.804
  },
  "oklch": {
    "l": 0.36989,
    "c": 0.22436,
    "h": 268.7
  },
  "luminance": 0.04141
}

Semantic roles & 50–950 ramp

primary

#1B18B3

secondary

#CBCD5A

accent

#F335EF

background

#F8F5FC

surface

#EFE9F9

border

#CAC5D2

text

#0B0414

muted

#7C7982

Preview Lab

Preview with #1B18B3

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

Preview Lab → · Contrast checker → · Palette generator →