#1B2B80#1B2B80

#1B2B80 is a dark, vivid blue. Relative luminance 0.035; OKLCH L 33.8% C 0.144 H 268.8°. Best body text is #FFFFFF at 12.33:1 contrast (WCAG AA passes).

Color values

HEX	#1B2B80
RGB	rgb(27, 43, 128)
HSL	hsl(230, 65%, 30%)
HSV	hsv(230, 79%, 50%)
CMYK	cmyk(78.9%, 66.4%, 0%, 49.8%)
CIE-LAB	lab(22.01, 26.10, -49.69)
CIE-LCH	lch(22.01, 56.13, 297.71°)
OKLab	oklab(33.8% -0.003 -0.1437)
OKLCH	oklch(33.8% 0.144 268.8)
XYZ	xyz(5.2108, 3.5187, 20.8224)
Luminance	0.0352 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B2B80 #80701B

analogous

#1B5D80 #1B2B80 #3D1B80

triadic

#1B2B80 #801B2B #2B801B

tetradic

#1B2B80 #801B5D #80701B #1B803D

square

#1B2B80 #801B5D #80701B #1B803D

split-complementary

#1B2B80 #803D1B #5D801B

monochromatic

#06091B #101A4D #1B2B80 #263CB3 #3F57D6

Accessibility & contrast

On white

12.33

#1B2B80 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.70

#1B2B80 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B2B80

12.33:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B2B80	#FFFFFF	#000000	##FFFFFF
##1B2B80	1.00	12.33	1.70	12.33
#FFFFFF	12.33	1.00	21.00	1.00
#000000	1.70	21.00	1.00	21.00
##FFFFFF	12.33	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003A83

Deuteranopia (green-blind)

#00307E

Tritanopia (blue-blind)

#004151

Achromatopsia (no color)

#353535

Design tokens & code

CSS

--color: #1b2b80;
/* rgb */ color: rgb(27, 43, 128);
/* oklch */ color: oklch(33.8% 0.144 268.8);

Tailwind

colors: {
  custom: {
    50: '#6964a6',
    500: '#1b2b80',
    950: '#000000',
  },
}

SCSS

$custom: #1b2b80;
$custom-light: #6964a6;
$custom-dark: #000000;

JSON

{
  "hex": "#1b2b80",
  "rgb": {
    "r": 27,
    "g": 43,
    "b": 128
  },
  "hsl": {
    "h": 230.495,
    "s": 65.161,
    "l": 30.392
  },
  "oklch": {
    "l": 0.33796,
    "c": 0.14376,
    "h": 268.8
  },
  "luminance": 0.03519
}

Semantic roles & 50–950 ramp

primary

#1B2B80

secondary

#B4A243

accent

#CD40E8

background

#F6F5FA

surface

#ECEAF4

border

#C7C6CE

text

#07050F

muted

#7A797F

Preview Lab

Preview with #1B2B80

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

Preview Lab → · Contrast checker → · Palette generator →