#1B2A7B#1B2A7B

#1B2A7B is a dark, vivid blue. Relative luminance 0.033; OKLCH L 33.1% C 0.138 H 269.1°. Best body text is #FFFFFF at 12.62:1 contrast (WCAG AA passes).

Color values

HEX	#1B2A7B
RGB	rgb(27, 42, 123)
HSL	hsl(231, 64%, 29%)
HSV	hsv(231, 78%, 48%)
CMYK	cmyk(78%, 65.9%, 0%, 51.8%)
CIE-LAB	lab(21.28, 24.83, -47.73)
CIE-LCH	lch(21.28, 53.80, 297.48°)
OKLab	oklab(33.11% -0.0022 -0.138)
OKLCH	oklch(33.11% 0.138 269.1)
XYZ	xyz(4.8539, 3.3185, 19.1198)
Luminance	0.0332 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B2A7B #7B6C1B

analogous

#1B5A7B #1B2A7B #3C1B7B

triadic

#1B2A7B #7B1B2A #2A7B1B

tetradic

#1B2A7B #7B1B5A #7B6C1B #1B7B3C

square

#1B2A7B #7B1B5A #7B6C1B #1B7B3C

split-complementary

#1B2A7B #7B3C1B #5A7B1B

monochromatic

#060919 #101949 #1B2A7B #263BAD #3C54D4

Accessibility & contrast

On white

12.62

#1B2A7B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.66

#1B2A7B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B2A7B

12.62:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B2A7B	#FFFFFF	#000000	##FFFFFF
##1B2A7B	1.00	12.62	1.66	12.62
#FFFFFF	12.62	1.00	21.00	1.00
#000000	1.66	21.00	1.00	21.00
##FFFFFF	12.62	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00387E

Deuteranopia (green-blind)

#002F79

Tritanopia (blue-blind)

#003F4E

Achromatopsia (no color)

#333333

Design tokens & code

CSS

--color: #1b2a7b;
/* rgb */ color: rgb(27, 42, 123);
/* oklch */ color: oklch(33.1% 0.138 269.1);

Tailwind

colors: {
  custom: {
    50: '#6863a2',
    500: '#1b2a7b',
    950: '#000000',
  },
}

SCSS

$custom: #1b2a7b;
$custom-light: #6863a2;
$custom-dark: #000000;

JSON

{
  "hex": "#1b2a7b",
  "rgb": {
    "r": 27,
    "g": 42,
    "b": 123
  },
  "hsl": {
    "h": 230.625,
    "s": 64,
    "l": 29.412
  },
  "oklch": {
    "l": 0.33111,
    "c": 0.13801,
    "h": 269.1
  },
  "luminance": 0.03319
}

Semantic roles & 50–950 ramp

primary

#1B2A7B

secondary

#AF9E43

accent

#CD41E7

background

#F6F5FA

surface

#EBEAF4

border

#C6C6CE

text

#07050F

muted

#7A797F

Preview Lab

Preview with #1B2A7B

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

Preview Lab → · Contrast checker → · Palette generator →