#1B2F84#1B2F84

#1B2F84 is a dark, vivid blue. Relative luminance 0.039; OKLCH L 35.0% C 0.144 H 267.7°. Best body text is #FFFFFF at 11.76:1 contrast (WCAG AA passes).

Color values

HEX	#1B2F84
RGB	rgb(27, 47, 132)
HSL	hsl(229, 66%, 31%)
HSV	hsv(229, 80%, 52%)
CMYK	cmyk(79.5%, 64.4%, 0%, 48.2%)
CIE-LAB	lab(23.44, 24.91, -49.86)
CIE-LCH	lch(23.44, 55.74, 296.55°)
OKLab	oklab(34.97% -0.0057 -0.1442)
OKLCH	oklch(34.97% 0.144 267.7)
XYZ	xyz(5.6319, 3.9314, 22.2873)
Luminance	0.0393 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B2F84 #84701B

analogous

#1B6384 #1B2F84 #3B1B84

triadic

#1B2F84 #841B2F #2F841B

tetradic

#1B2F84 #841B63 #84701B #1B843B

square

#1B2F84 #841B63 #84701B #1B843B

split-complementary

#1B2F84 #843B1B #63841B

monochromatic

#060B1E #111D51 #1B2F84 #2541B7 #415ED8

Accessibility & contrast

On white

11.76

#1B2F84 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.79

#1B2F84 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B2F84

11.76:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B2F84	#FFFFFF	#000000	##FFFFFF
##1B2F84	1.00	11.76	1.79	11.76
#FFFFFF	11.76	1.00	21.00	1.00
#000000	1.79	21.00	1.00	21.00
##FFFFFF	11.76	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003D87

Deuteranopia (green-blind)

#003382

Tritanopia (blue-blind)

#004555

Achromatopsia (no color)

#383838

Design tokens & code

CSS

--color: #1b2f84;
/* rgb */ color: rgb(27, 47, 132);
/* oklch */ color: oklch(35.0% 0.144 267.7);

Tailwind

colors: {
  custom: {
    50: '#6a67a9',
    500: '#1b2f84',
    950: '#000000',
  },
}

SCSS

$custom: #1b2f84;
$custom-light: #6a67a9;
$custom-dark: #000000;

JSON

{
  "hex": "#1b2f84",
  "rgb": {
    "r": 27,
    "g": 47,
    "b": 132
  },
  "hsl": {
    "h": 228.571,
    "s": 66.038,
    "l": 31.176
  },
  "oklch": {
    "l": 0.34966,
    "c": 0.1443,
    "h": 267.7
  },
  "luminance": 0.03932
}

Semantic roles & 50–950 ramp

primary

#1B2F84

secondary

#B7A143

accent

#C93FE9

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#070610

muted

#7A7A7F

Preview Lab

Preview with #1B2F84

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

Preview Lab → · Contrast checker → · Palette generator →