#1B2B70#1B2B70

#1B2B70 is a dark, vivid blue. Relative luminance 0.031; OKLCH L 32.3% C 0.121 H 268.7°. Best body text is #FFFFFF at 12.91:1 contrast (WCAG AA passes).

Color values

HEX	#1B2B70
RGB	rgb(27, 43, 112)
HSL	hsl(229, 61%, 27%)
HSV	hsv(229, 76%, 44%)
CMYK	cmyk(75.9%, 61.6%, 0%, 56.1%)
CIE-LAB	lab(20.56, 19.74, -41.86)
CIE-LCH	lch(20.56, 46.28, 295.25°)
OKLab	oklab(32.27% -0.0028 -0.1208)
OKLCH	oklch(32.27% 0.121 268.7)
XYZ	xyz(4.2395, 3.1302, 15.7068)
Luminance	0.0313 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B2B70 #70601B

analogous

#1B5670 #1B2B70 #361B70

triadic

#1B2B70 #701B2B #2B701B

tetradic

#1B2B70 #701B56 #70601B #1B7036

square

#1B2B70 #701B56 #70601B #1B7036

split-complementary

#1B2B70 #70361B #56701B

monochromatic

#060919 #0F183F #1B2B70 #273EA1 #3753CF

Accessibility & contrast

On white

12.91

#1B2B70 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.63

#1B2B70 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B2B70

12.91:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B2B70	#FFFFFF	#000000	##FFFFFF
##1B2B70	1.00	12.91	1.63	12.91
#FFFFFF	12.91	1.00	21.00	1.00
#000000	1.63	21.00	1.00	21.00
##FFFFFF	12.91	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003672

Deuteranopia (green-blind)

#002E6F

Tritanopia (blue-blind)

#003C49

Achromatopsia (no color)

#323232

Design tokens & code

CSS

--color: #1b2b70;
/* rgb */ color: rgb(27, 43, 112);
/* oklch */ color: oklch(32.3% 0.121 268.7);

Tailwind

colors: {
  custom: {
    50: '#65649a',
    500: '#1b2b70',
    950: '#000000',
  },
}

SCSS

$custom: #1b2b70;
$custom-light: #65649a;
$custom-dark: #000000;

JSON

{
  "hex": "#1b2b70",
  "rgb": {
    "r": 27,
    "g": 43,
    "b": 112
  },
  "hsl": {
    "h": 228.706,
    "s": 61.151,
    "l": 27.255
  },
  "oklch": {
    "l": 0.3227,
    "c": 0.1208,
    "h": 268.7
  },
  "luminance": 0.03131
}

Semantic roles & 50–950 ramp

primary

#1B2B70

secondary

#A59242

accent

#C644E4

background

#F6F5F9

surface

#EBEAF2

border

#C6C6CC

text

#06050E

muted

#7A797E

Preview Lab

Preview with #1B2B70

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

Preview Lab → · Contrast checker → · Palette generator →