#1B2B79#1B2B79

#1B2B79 is a dark, vivid blue. Relative luminance 0.033; OKLCH L 33.1% C 0.134 H 268.8°. Best body text is #FFFFFF at 12.59:1 contrast (WCAG AA passes).

Color values

HEX	#1B2B79
RGB	rgb(27, 43, 121)
HSL	hsl(230, 64%, 29%)
HSV	hsv(230, 78%, 47%)
CMYK	cmyk(77.7%, 64.5%, 0%, 52.5%)
CIE-LAB	lab(21.36, 23.34, -46.32)
CIE-LCH	lch(21.36, 51.87, 296.75°)
OKLab	oklab(33.12% -0.0028 -0.1338)
OKLCH	oklch(33.12% 0.134 268.8)
XYZ	xyz(4.7659, 3.3407, 18.4791)
Luminance	0.0334 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B2B79 #79691B

analogous

#1B5A79 #1B2B79 #3A1B79

triadic

#1B2B79 #791B2B #2B791B

tetradic

#1B2B79 #791B5A #79691B #1B793A

square

#1B2B79 #791B5A #79691B #1B793A

split-complementary

#1B2B79 #793A1B #5A791B

monochromatic

#060919 #101947 #1B2B79 #263DAB #3B55D3

Accessibility & contrast

On white

12.59

#1B2B79 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.67

#1B2B79 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B2B79

12.59:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B2B79	#FFFFFF	#000000	##FFFFFF
##1B2B79	1.00	12.59	1.67	12.59
#FFFFFF	12.59	1.00	21.00	1.00
#000000	1.67	21.00	1.00	21.00
##FFFFFF	12.59	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00387C

Deuteranopia (green-blind)

#002F78

Tritanopia (blue-blind)

#003F4D

Achromatopsia (no color)

#333333

Design tokens & code

CSS

--color: #1b2b79;
/* rgb */ color: rgb(27, 43, 121);
/* oklch */ color: oklch(33.1% 0.134 268.8);

Tailwind

colors: {
  custom: {
    50: '#6764a0',
    500: '#1b2b79',
    950: '#000000',
  },
}

SCSS

$custom: #1b2b79;
$custom-light: #6764a0;
$custom-dark: #000000;

JSON

{
  "hex": "#1b2b79",
  "rgb": {
    "r": 27,
    "g": 43,
    "b": 121
  },
  "hsl": {
    "h": 229.787,
    "s": 63.514,
    "l": 29.02
  },
  "oklch": {
    "l": 0.33115,
    "c": 0.13388,
    "h": 268.8
  },
  "luminance": 0.03341
}

Semantic roles & 50–950 ramp

primary

#1B2B79

secondary

#AD9B43

accent

#CA41E7

background

#F6F5FA

surface

#EBEAF3

border

#C6C6CD

text

#07050F

muted

#7A797F

Preview Lab

Preview with #1B2B79

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

Preview Lab → · Contrast checker → · Palette generator →