#1B2A80#1B2A80

#1B2A80 is a dark, vivid blue. Relative luminance 0.034; OKLCH L 33.6% C 0.145 H 269.0°. Best body text is #FFFFFF at 12.43:1 contrast (WCAG AA passes).

Color values

HEX	#1B2A80
RGB	rgb(27, 42, 128)
HSL	hsl(231, 65%, 30%)
HSV	hsv(231, 79%, 50%)
CMYK	cmyk(78.9%, 67.2%, 0%, 49.8%)
CIE-LAB	lab(21.75, 26.78, -50.12)
CIE-LCH	lch(21.75, 56.82, 298.12°)
OKLab	oklab(33.61% -0.0024 -0.145)
OKLCH	oklch(33.61% 0.145 269)
XYZ	xyz(5.1749, 3.4469, 20.8105)
Luminance	0.0345 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B2A80 #80711B

analogous

#1B5C80 #1B2A80 #3E1B80

triadic

#1B2A80 #801B2A #2A801B

tetradic

#1B2A80 #801B5C #80711B #1B803E

square

#1B2A80 #801B5C #80711B #1B803E

split-complementary

#1B2A80 #803E1B #5C801B

monochromatic

#06091B #10194D #1B2A80 #263BB3 #3F55D6

Accessibility & contrast

On white

12.43

#1B2A80 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.69

#1B2A80 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B2A80

12.43:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B2A80	#FFFFFF	#000000	##FFFFFF
##1B2A80	1.00	12.43	1.69	12.43
#FFFFFF	12.43	1.00	21.00	1.00
#000000	1.69	21.00	1.00	21.00
##FFFFFF	12.43	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003983

Deuteranopia (green-blind)

#002F7E

Tritanopia (blue-blind)

#004151

Achromatopsia (no color)

#343434

Design tokens & code

CSS

--color: #1b2a80;
/* rgb */ color: rgb(27, 42, 128);
/* oklch */ color: oklch(33.6% 0.145 269.0);

Tailwind

colors: {
  custom: {
    50: '#6963a6',
    500: '#1b2a80',
    950: '#000000',
  },
}

SCSS

$custom: #1b2a80;
$custom-light: #6963a6;
$custom-dark: #000000;

JSON

{
  "hex": "#1b2a80",
  "rgb": {
    "r": 27,
    "g": 42,
    "b": 128
  },
  "hsl": {
    "h": 231.089,
    "s": 65.161,
    "l": 30.392
  },
  "oklch": {
    "l": 0.33605,
    "c": 0.145,
    "h": 269
  },
  "luminance": 0.03447
}

Semantic roles & 50–950 ramp

primary

#1B2A80

secondary

#B4A343

accent

#CF40E8

background

#F6F5FA

surface

#ECEAF4

border

#C7C6CE

text

#07050F

muted

#7A797F

Preview Lab

Preview with #1B2A80

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

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