#1B2871#1B2871

#1B2871 is a dark, vivid blue. Relative luminance 0.029; OKLCH L 31.7% C 0.126 H 269.8°. Best body text is #FFFFFF at 13.22:1 contrast (WCAG AA passes).

Color values

HEX	#1B2871
RGB	rgb(27, 40, 113)
HSL	hsl(231, 61%, 27%)
HSV	hsv(231, 76%, 44%)
CMYK	cmyk(76.1%, 64.6%, 0%, 55.7%)
CIE-LAB	lab(19.81, 22.27, -43.72)
CIE-LCH	lch(19.81, 49.07, 297.00°)
OKLab	oklab(31.74% -0.0004 -0.1263)
OKLCH	oklch(31.74% 0.126 269.8)
XYZ	xyz(4.1904, 2.9424, 15.9667)
Luminance	0.0294 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B2871 #71641B

analogous

#1B5371 #1B2871 #391B71

triadic

#1B2871 #711B28 #28711B

tetradic

#1B2871 #711B53 #71641B #1B7139

square

#1B2871 #711B53 #71641B #1B7139

split-complementary

#1B2871 #71391B #53711B

monochromatic

#060919 #0F1740 #1B2871 #2739A2 #374ECF

Accessibility & contrast

On white

13.22

#1B2871 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.59

#1B2871 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B2871

13.22:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B2871	#FFFFFF	#000000	##FFFFFF
##1B2871	1.00	13.22	1.59	13.22
#FFFFFF	13.22	1.00	21.00	1.00
#000000	1.59	21.00	1.00	21.00
##FFFFFF	13.22	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003473

Deuteranopia (green-blind)

#002C70

Tritanopia (blue-blind)

#003B48

Achromatopsia (no color)

#303030

Design tokens & code

CSS

--color: #1b2871;
/* rgb */ color: rgb(27, 40, 113);
/* oklch */ color: oklch(31.7% 0.126 269.8);

Tailwind

colors: {
  custom: {
    50: '#65619b',
    500: '#1b2871',
    950: '#000000',
  },
}

SCSS

$custom: #1b2871;
$custom-light: #65619b;
$custom-dark: #000000;

JSON

{
  "hex": "#1b2871",
  "rgb": {
    "r": 27,
    "g": 40,
    "b": 113
  },
  "hsl": {
    "h": 230.93,
    "s": 61.429,
    "l": 27.451
  },
  "oklch": {
    "l": 0.31744,
    "c": 0.12627,
    "h": 269.8
  },
  "luminance": 0.02943
}

Semantic roles & 50–950 ramp

primary

#1B2871

secondary

#A69742

accent

#CC43E5

background

#F6F5F9

surface

#EBE9F2

border

#C6C5CC

text

#06050E

muted

#7A797E

Preview Lab

Preview with #1B2871

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

Preview Lab → · Contrast checker → · Palette generator →