#1B41AA#1B41AA

#1B41AA is a dark, vivid blue. Relative luminance 0.069; OKLCH L 42.1% C 0.174 H 264.6°. Best body text is #FFFFFF at 8.81:1 contrast (WCAG AA passes).

Color values

HEX	#1B41AA
RGB	rgb(27, 65, 170)
HSL	hsl(224, 73%, 39%)
HSV	hsv(224, 84%, 67%)
CMYK	cmyk(84.1%, 61.8%, 0%, 33.3%)
CIE-LAB	lab(31.61, 27.59, -59.77)
CIE-LCH	lch(31.61, 65.83, 294.78°)
OKLab	oklab(42.08% -0.0164 -0.173)
OKLCH	oklch(42.08% 0.174 264.6)
XYZ	xyz(9.5954, 6.9147, 38.8514)
Luminance	0.0692 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B41AA #AA841B

analogous

#1B88AA #1B41AA #3C1BAA

triadic

#1B41AA #AA1B41 #41AA1B

tetradic

#1B41AA #AA1B88 #AA841B #1BAA3C

square

#1B41AA #AA1B88 #AA841B #1BAA3C

split-complementary

#1B41AA #AA3C1B #88AA1B

monochromatic

#0A1940 #132D75 #1B41AA #2656DC #5B7FE5

Accessibility & contrast

On white

8.81

#1B41AA on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.38

#1B41AA on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B41AA

8.81:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B41AA	#FFFFFF	#000000	##FFFFFF
##1B41AA	1.00	8.81	2.38	8.81
#FFFFFF	8.81	1.00	21.00	1.00
#000000	2.38	21.00	1.00	21.00
##FFFFFF	8.81	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0051AD

Deuteranopia (green-blind)

#0044A8

Tritanopia (blue-blind)

#005C6F

Achromatopsia (no color)

#4A4A4A

Design tokens & code

CSS

--color: #1b41aa;
/* rgb */ color: rgb(27, 65, 170);
/* oklch */ color: oklch(42.1% 0.174 264.6);

Tailwind

colors: {
  custom: {
    50: '#7275c4',
    500: '#1b41aa',
    950: '#000000',
  },
}

SCSS

$custom: #1b41aa;
$custom-light: #7275c4;
$custom-dark: #000000;

JSON

{
  "hex": "#1b41aa",
  "rgb": {
    "r": 27,
    "g": 65,
    "b": 170
  },
  "hsl": {
    "h": 224.056,
    "s": 72.589,
    "l": 38.627
  },
  "oklch": {
    "l": 0.42075,
    "c": 0.17375,
    "h": 264.6
  },
  "luminance": 0.06916
}

Semantic roles & 50–950 ramp

primary

#1B41AA

secondary

#C9AB58

accent

#BF39EF

background

#F7F7FC

surface

#EEEDF8

border

#C9C8D1

text

#090813

muted

#7B7B82

Preview Lab

Preview with #1B41AA

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

Preview Lab → · Contrast checker → · Palette generator →