#1B2872#1B2872

#1B2872 is a dark, vivid blue. Relative luminance 0.030; OKLCH L 31.8% C 0.128 H 269.8°. Best body text is #FFFFFF at 13.18:1 contrast (WCAG AA passes).

Color values

HEX	#1B2872
RGB	rgb(27, 40, 114)
HSL	hsl(231, 62%, 28%)
HSV	hsv(231, 76%, 45%)
CMYK	cmyk(76.3%, 64.9%, 0%, 55.3%)
CIE-LAB	lab(19.90, 22.67, -44.22)
CIE-LCH	lch(19.90, 49.69, 297.14°)
OKLab	oklab(31.84% -0.0004 -0.1277)
OKLCH	oklch(31.84% 0.128 269.8)
XYZ	xyz(4.2470, 2.9651, 16.2648)
Luminance	0.0297 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B2872 #72651B

analogous

#1B5472 #1B2872 #391B72

triadic

#1B2872 #721B28 #28721B

tetradic

#1B2872 #721B54 #72651B #1B7239

square

#1B2872 #721B54 #72651B #1B7239

split-complementary

#1B2872 #72391B #54721B

monochromatic

#060919 #0F1741 #1B2872 #2739A3 #384ED0

Accessibility & contrast

On white

13.18

#1B2872 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.59

#1B2872 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B2872

13.18:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B2872	#FFFFFF	#000000	##FFFFFF
##1B2872	1.00	13.18	1.59	13.18
#FFFFFF	13.18	1.00	21.00	1.00
#000000	1.59	21.00	1.00	21.00
##FFFFFF	13.18	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003474

Deuteranopia (green-blind)

#002C71

Tritanopia (blue-blind)

#003B49

Achromatopsia (no color)

#303030

Design tokens & code

CSS

--color: #1b2872;
/* rgb */ color: rgb(27, 40, 114);
/* oklch */ color: oklch(31.8% 0.128 269.8);

Tailwind

colors: {
  custom: {
    50: '#66619b',
    500: '#1b2872',
    950: '#000000',
  },
}

SCSS

$custom: #1b2872;
$custom-light: #66619b;
$custom-dark: #000000;

JSON

{
  "hex": "#1b2872",
  "rgb": {
    "r": 27,
    "g": 40,
    "b": 114
  },
  "hsl": {
    "h": 231.034,
    "s": 61.702,
    "l": 27.647
  },
  "oklch": {
    "l": 0.3184,
    "c": 0.12772,
    "h": 269.8
  },
  "luminance": 0.02966
}

Semantic roles & 50–950 ramp

primary

#1B2872

secondary

#A79842

accent

#CD43E5

background

#F6F5F9

surface

#EBE9F2

border

#C6C5CC

text

#06050E

muted

#7A797E

Preview Lab

Preview with #1B2872

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

Preview Lab → · Contrast checker → · Palette generator →