#1B2A79#1B2A79

#1B2A79 is a dark, vivid blue. Relative luminance 0.033; OKLCH L 32.9% C 0.135 H 269.1°. Best body text is #FFFFFF at 12.70:1 contrast (WCAG AA passes).

Color values

HEX	#1B2A79
RGB	rgb(27, 42, 121)
HSL	hsl(230, 64%, 29%)
HSV	hsv(230, 78%, 47%)
CMYK	cmyk(77.7%, 65.3%, 0%, 52.5%)
CIE-LAB	lab(21.09, 24.04, -46.76)
CIE-LCH	lch(21.09, 52.58, 297.21°)
OKLab	oklab(32.92% -0.0021 -0.1351)
OKLCH	oklch(32.92% 0.135 269.1)
XYZ	xyz(4.7300, 3.2689, 18.4671)
Luminance	0.0327 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B2A79 #796A1B

analogous

#1B5979 #1B2A79 #3B1B79

triadic

#1B2A79 #791B2A #2A791B

tetradic

#1B2A79 #791B59 #796A1B #1B793B

square

#1B2A79 #791B59 #796A1B #1B793B

split-complementary

#1B2A79 #793B1B #59791B

monochromatic

#060919 #101947 #1B2A79 #263BAB #3B53D3

Accessibility & contrast

On white

12.70

#1B2A79 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.65

#1B2A79 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B2A79

12.70:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B2A79	#FFFFFF	#000000	##FFFFFF
##1B2A79	1.00	12.70	1.65	12.70
#FFFFFF	12.70	1.00	21.00	1.00
#000000	1.65	21.00	1.00	21.00
##FFFFFF	12.70	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00377C

Deuteranopia (green-blind)

#002E77

Tritanopia (blue-blind)

#003E4D

Achromatopsia (no color)

#333333

Design tokens & code

CSS

--color: #1b2a79;
/* rgb */ color: rgb(27, 42, 121);
/* oklch */ color: oklch(32.9% 0.135 269.1);

Tailwind

colors: {
  custom: {
    50: '#6763a0',
    500: '#1b2a79',
    950: '#000000',
  },
}

SCSS

$custom: #1b2a79;
$custom-light: #6763a0;
$custom-dark: #000000;

JSON

{
  "hex": "#1b2a79",
  "rgb": {
    "r": 27,
    "g": 42,
    "b": 121
  },
  "hsl": {
    "h": 230.426,
    "s": 63.514,
    "l": 29.02
  },
  "oklch": {
    "l": 0.32916,
    "c": 0.13517,
    "h": 269.1
  },
  "luminance": 0.03269
}

Semantic roles & 50–950 ramp

primary

#1B2A79

secondary

#AD9C43

accent

#CC41E7

background

#F6F5FA

surface

#EBEAF3

border

#C6C6CD

text

#07050F

muted

#7A797F

Preview Lab

Preview with #1B2A79

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

Preview Lab → · Contrast checker → · Palette generator →