#1B2B7E#1B2B7E

#1B2B7E is a dark, vivid blue. Relative luminance 0.035; OKLCH L 33.6% C 0.141 H 268.8°. Best body text is #FFFFFF at 12.40:1 contrast (WCAG AA passes).

Color values

HEX	#1B2B7E
RGB	rgb(27, 43, 126)
HSL	hsl(230, 65%, 30%)
HSV	hsv(230, 79%, 49%)
CMYK	cmyk(78.6%, 65.9%, 0%, 50.6%)
CIE-LAB	lab(21.82, 25.32, -48.73)
CIE-LCH	lch(21.82, 54.92, 297.45°)
OKLab	oklab(33.6% -0.003 -0.1409)
OKLCH	oklch(33.6% 0.141 268.8)
XYZ	xyz(5.0805, 3.4666, 20.1360)
Luminance	0.0347 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B2B7E #7E6E1B

analogous

#1B5D7E #1B2B7E #3C1B7E

triadic

#1B2B7E #7E1B2B #2B7E1B

tetradic

#1B2B7E #7E1B5D #7E6E1B #1B7E3C

square

#1B2B7E #7E1B5D #7E6E1B #1B7E3C

split-complementary

#1B2B7E #7E3C1B #5D7E1B

monochromatic

#050919 #101A4C #1B2B7E #263CB0 #3E56D6

Accessibility & contrast

On white

12.40

#1B2B7E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.69

#1B2B7E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B2B7E

12.40:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B2B7E	#FFFFFF	#000000	##FFFFFF
##1B2B7E	1.00	12.40	1.69	12.40
#FFFFFF	12.40	1.00	21.00	1.00
#000000	1.69	21.00	1.00	21.00
##FFFFFF	12.40	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003981

Deuteranopia (green-blind)

#00307C

Tritanopia (blue-blind)

#004150

Achromatopsia (no color)

#343434

Design tokens & code

CSS

--color: #1b2b7e;
/* rgb */ color: rgb(27, 43, 126);
/* oklch */ color: oklch(33.6% 0.141 268.8);

Tailwind

colors: {
  custom: {
    50: '#6864a4',
    500: '#1b2b7e',
    950: '#000000',
  },
}

SCSS

$custom: #1b2b7e;
$custom-light: #6864a4;
$custom-dark: #000000;

JSON

{
  "hex": "#1b2b7e",
  "rgb": {
    "r": 27,
    "g": 43,
    "b": 126
  },
  "hsl": {
    "h": 230.303,
    "s": 64.706,
    "l": 30
  },
  "oklch": {
    "l": 0.336,
    "c": 0.14096,
    "h": 268.8
  },
  "luminance": 0.03467
}

Semantic roles & 50–950 ramp

primary

#1B2B7E

secondary

#B2A043

accent

#CD40E8

background

#F6F5FA

surface

#ECEAF4

border

#C7C6CE

text

#07050F

muted

#7A797F

Preview Lab

Preview with #1B2B7E

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

Preview Lab → · Contrast checker → · Palette generator →