#1B1BB3#1B1BB3

#1B1BB3 is a dark, highly saturated blue. Relative luminance 0.043; OKLCH L 37.3% C 0.222 H 268.6°. Best body text is #FFFFFF at 11.32:1 contrast (WCAG AA passes).

Color values

HEX	#1B1BB3
RGB	rgb(27, 27, 179)
HSL	hsl(240, 74%, 40%)
HSV	hsv(240, 85%, 70%)
CMYK	cmyk(84.9%, 84.9%, 0%, 29.8%)
CIE-LAB	lab(24.55, 52.94, -76.82)
CIE-LCH	lch(24.55, 93.29, 304.57°)
OKLab	oklab(37.28% -0.0054 -0.2224)
OKLCH	oklch(37.28% 0.222 268.6)
XYZ	xyz(8.9778, 4.2705, 42.9902)
Luminance	0.0427 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B1BB3 #B3B31B

analogous

#1B67B3 #1B1BB3 #671BB3

triadic

#1B1BB3 #B31B1B #1BB31B

tetradic

#1B1BB3 #B31B67 #B3B31B #1BB367

square

#1B1BB3 #B31B67 #B3B31B #1BB367

split-complementary

#1B1BB3 #B3671B #67B31B

monochromatic

#0B0B49 #13137E #1B1BB3 #2C2CDF #6161E7

Accessibility & contrast

On white

11.32

#1B1BB3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.85

#1B1BB3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B1BB3

11.32:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B1BB3	#FFFFFF	#000000	##FFFFFF
##1B1BB3	1.00	11.32	1.85	11.32
#FFFFFF	11.32	1.00	21.00	1.00
#000000	1.85	21.00	1.00	21.00
##FFFFFF	11.32	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0042B7

Deuteranopia (green-blind)

#0032B1

Tritanopia (blue-blind)

#004E6A

Achromatopsia (no color)

#3A3A3A

Design tokens & code

CSS

--color: #1b1bb3;
/* rgb */ color: rgb(27, 27, 179);
/* oklch */ color: oklch(37.3% 0.222 268.6);

Tailwind

colors: {
  custom: {
    50: '#785dcb',
    500: '#1b1bb3',
    950: '#000000',
  },
}

SCSS

$custom: #1b1bb3;
$custom-light: #785dcb;
$custom-dark: #000000;

JSON

{
  "hex": "#1b1bb3",
  "rgb": {
    "r": 27,
    "g": 27,
    "b": 179
  },
  "hsl": {
    "h": 240,
    "s": 73.786,
    "l": 40.392
  },
  "oklch": {
    "l": 0.37276,
    "c": 0.22242,
    "h": 268.6
  },
  "luminance": 0.04272
}

Semantic roles & 50–950 ramp

primary

#1B1BB3

secondary

#CCCC5E

accent

#F037F0

background

#F8F5FC

surface

#EFE9F9

border

#CAC5D2

text

#0B0414

muted

#7C7982

Preview Lab

Preview with #1B1BB3

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

Preview Lab → · Contrast checker → · Palette generator →