#1B41B0#1B41B0

#1B41B0 is a dark, vivid blue. Relative luminance 0.071; OKLCH L 42.6% C 0.182 H 264.8°. Best body text is #FFFFFF at 8.64:1 contrast (WCAG AA passes).

Color values

HEX	#1B41B0
RGB	rgb(27, 65, 176)
HSL	hsl(225, 73%, 40%)
HSV	hsv(225, 85%, 69%)
CMYK	cmyk(84.7%, 63.1%, 0%, 31%)
CIE-LAB	lab(32.14, 29.92, -62.48)
CIE-LCH	lch(32.14, 69.28, 295.59°)
OKLab	oklab(42.63% -0.0163 -0.1809)
OKLCH	oklch(42.63% 0.182 264.8)
XYZ	xyz(10.1760, 7.1469, 41.9090)
Luminance	0.0715 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B41B0 #B08A1B

analogous

#1B8CB0 #1B41B0 #401BB0

triadic

#1B41B0 #B01B41 #41B01B

tetradic

#1B41B0 #B01B8C #B08A1B #1BB040

square

#1B41B0 #B01B8C #B08A1B #1BB040

split-complementary

#1B41B0 #B0401B #8CB01B

monochromatic

#0B1A46 #132D7B #1B41B0 #2A58DE #5F82E6

Accessibility & contrast

On white

8.64

#1B41B0 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.43

#1B41B0 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B41B0

8.64:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B41B0	#FFFFFF	#000000	##FFFFFF
##1B41B0	1.00	8.64	2.43	8.64
#FFFFFF	8.64	1.00	21.00	1.00
#000000	2.43	21.00	1.00	21.00
##FFFFFF	8.64	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0053B4

Deuteranopia (green-blind)

#0045AE

Tritanopia (blue-blind)

#005E72

Achromatopsia (no color)

#4C4C4C

Design tokens & code

CSS

--color: #1b41b0;
/* rgb */ color: rgb(27, 65, 176);
/* oklch */ color: oklch(42.6% 0.182 264.8);

Tailwind

colors: {
  custom: {
    50: '#7475c9',
    500: '#1b41b0',
    950: '#000000',
  },
}

SCSS

$custom: #1b41b0;
$custom-light: #7475c9;
$custom-dark: #000000;

JSON

{
  "hex": "#1b41b0",
  "rgb": {
    "r": 27,
    "g": 65,
    "b": 176
  },
  "hsl": {
    "h": 224.698,
    "s": 73.399,
    "l": 39.804
  },
  "oklch": {
    "l": 0.42629,
    "c": 0.18168,
    "h": 264.8
  },
  "luminance": 0.07148
}

Semantic roles & 50–950 ramp

primary

#1B41B0

secondary

#CBAE5C

accent

#C138F0

background

#F7F7FC

surface

#EEEDF8

border

#C9C8D1

text

#0A0813

muted

#7C7B82

Preview Lab

Preview with #1B41B0

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

Preview Lab → · Contrast checker → · Palette generator →