#1B2A7F#1B2A7F

#1B2A7F is a dark, vivid blue. Relative luminance 0.034; OKLCH L 33.5% C 0.144 H 269.1°. Best body text is #FFFFFF at 12.47:1 contrast (WCAG AA passes).

Color values

HEX	#1B2A7F
RGB	rgb(27, 42, 127)
HSL	hsl(231, 65%, 30%)
HSV	hsv(231, 79%, 50%)
CMYK	cmyk(78.7%, 66.9%, 0%, 50.2%)
CIE-LAB	lab(21.66, 26.40, -49.64)
CIE-LCH	lch(21.66, 56.22, 298.00°)
OKLab	oklab(33.51% -0.0024 -0.1436)
OKLCH	oklch(33.51% 0.144 269.1)
XYZ	xyz(5.1094, 3.4207, 20.4655)
Luminance	0.0342 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B2A7F #7F701B

analogous

#1B5C7F #1B2A7F #3E1B7F

triadic

#1B2A7F #7F1B2A #2A7F1B

tetradic

#1B2A7F #7F1B5C #7F701B #1B7F3E

square

#1B2A7F #7F1B5C #7F701B #1B7F3E

split-complementary

#1B2A7F #7F3E1B #5C7F1B

monochromatic

#06091A #10194D #1B2A7F #263BB1 #3E55D6

Accessibility & contrast

On white

12.47

#1B2A7F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.68

#1B2A7F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B2A7F

12.47:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B2A7F	#FFFFFF	#000000	##FFFFFF
##1B2A7F	1.00	12.47	1.68	12.47
#FFFFFF	12.47	1.00	21.00	1.00
#000000	1.68	21.00	1.00	21.00
##FFFFFF	12.47	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003982

Deuteranopia (green-blind)

#002F7D

Tritanopia (blue-blind)

#004050

Achromatopsia (no color)

#343434

Design tokens & code

CSS

--color: #1b2a7f;
/* rgb */ color: rgb(27, 42, 127);
/* oklch */ color: oklch(33.5% 0.144 269.1);

Tailwind

colors: {
  custom: {
    50: '#6963a5',
    500: '#1b2a7f',
    950: '#000000',
  },
}

SCSS

$custom: #1b2a7f;
$custom-light: #6963a5;
$custom-dark: #000000;

JSON

{
  "hex": "#1b2a7f",
  "rgb": {
    "r": 27,
    "g": 42,
    "b": 127
  },
  "hsl": {
    "h": 231,
    "s": 64.935,
    "l": 30.196
  },
  "oklch": {
    "l": 0.33506,
    "c": 0.14362,
    "h": 269.1
  },
  "luminance": 0.03421
}

Semantic roles & 50–950 ramp

primary

#1B2A7F

secondary

#B3A243

accent

#CF40E8

background

#F6F5FA

surface

#ECEAF4

border

#C7C6CE

text

#07050F

muted

#7A797F

Preview Lab

Preview with #1B2A7F

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

Preview Lab → · Contrast checker → · Palette generator →