#1B2B71#1B2B71

#1B2B71 is a dark, vivid blue. Relative luminance 0.032; OKLCH L 32.4% C 0.122 H 268.7°. Best body text is #FFFFFF at 12.88:1 contrast (WCAG AA passes).

Color values

HEX	#1B2B71
RGB	rgb(27, 43, 113)
HSL	hsl(229, 61%, 27%)
HSV	hsv(229, 76%, 44%)
CMYK	cmyk(76.1%, 61.9%, 0%, 55.7%)
CIE-LAB	lab(20.64, 20.15, -42.36)
CIE-LCH	lch(20.64, 46.91, 295.43°)
OKLab	oklab(32.36% -0.0028 -0.1222)
OKLCH	oklch(32.36% 0.122 268.7)
XYZ	xyz(4.2955, 3.1526, 16.0017)
Luminance	0.0315 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B2B71 #71611B

analogous

#1B5671 #1B2B71 #361B71

triadic

#1B2B71 #711B2B #2B711B

tetradic

#1B2B71 #711B56 #71611B #1B7136

square

#1B2B71 #711B56 #71611B #1B7136

split-complementary

#1B2B71 #71361B #56711B

monochromatic

#060919 #0F1840 #1B2B71 #273EA2 #3753CF

Accessibility & contrast

On white

12.88

#1B2B71 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.63

#1B2B71 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B2B71

12.88:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B2B71	#FFFFFF	#000000	##FFFFFF
##1B2B71	1.00	12.88	1.63	12.88
#FFFFFF	12.88	1.00	21.00	1.00
#000000	1.63	21.00	1.00	21.00
##FFFFFF	12.88	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003673

Deuteranopia (green-blind)

#002E70

Tritanopia (blue-blind)

#003D49

Achromatopsia (no color)

#323232

Design tokens & code

CSS

--color: #1b2b71;
/* rgb */ color: rgb(27, 43, 113);
/* oklch */ color: oklch(32.4% 0.122 268.7);

Tailwind

colors: {
  custom: {
    50: '#65649a',
    500: '#1b2b71',
    950: '#000000',
  },
}

SCSS

$custom: #1b2b71;
$custom-light: #65649a;
$custom-dark: #000000;

JSON

{
  "hex": "#1b2b71",
  "rgb": {
    "r": 27,
    "g": 43,
    "b": 113
  },
  "hsl": {
    "h": 228.837,
    "s": 61.429,
    "l": 27.451
  },
  "oklch": {
    "l": 0.32362,
    "c": 0.12228,
    "h": 268.7
  },
  "luminance": 0.03153
}

Semantic roles & 50–950 ramp

primary

#1B2B71

secondary

#A69342

accent

#C743E5

background

#F6F5F9

surface

#EBEAF2

border

#C6C6CC

text

#06050E

muted

#7A797E

Preview Lab

Preview with #1B2B71

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

Preview Lab → · Contrast checker → · Palette generator →