#1B3C9F#1B3C9F

#1B3C9F is a dark, vivid blue. Relative luminance 0.060; OKLCH L 40.1% C 0.165 H 265.2°. Best body text is #FFFFFF at 9.57:1 contrast (WCAG AA passes).

Color values

HEX	#1B3C9F
RGB	rgb(27, 60, 159)
HSL	hsl(225, 71%, 36%)
HSV	hsv(225, 83%, 62%)
CMYK	cmyk(83%, 62.3%, 0%, 37.6%)
CIE-LAB	lab(29.33, 26.66, -56.87)
CIE-LCH	lch(29.33, 62.81, 295.11°)
OKLab	oklab(40.08% -0.0137 -0.1646)
OKLCH	oklch(40.08% 0.165 265.2)
XYZ	xyz(8.3236, 5.9669, 33.5072)
Luminance	0.0597 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B3C9F #9F7E1B

analogous

#1B7E9F #1B3C9F #3C1B9F

triadic

#1B3C9F #9F1B3C #3C9F1B

tetradic

#1B3C9F #9F1B7E #9F7E1B #1B9F3C

square

#1B3C9F #9F1B7E #9F7E1B #1B9F3C

split-complementary

#1B3C9F #9F3C1B #7E9F1B

monochromatic

#091536 #12286B #1B3C9F #2450D3 #5376E2

Accessibility & contrast

On white

9.57

#1B3C9F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.19

#1B3C9F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B3C9F

9.57:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B3C9F	#FFFFFF	#000000	##FFFFFF
##1B3C9F	1.00	9.57	2.19	9.57
#FFFFFF	9.57	1.00	21.00	1.00
#000000	2.19	21.00	1.00	21.00
##FFFFFF	9.57	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004BA2

Deuteranopia (green-blind)

#003F9D

Tritanopia (blue-blind)

#005667

Achromatopsia (no color)

#454545

Design tokens & code

CSS

--color: #1b3c9f;
/* rgb */ color: rgb(27, 60, 159);
/* oklch */ color: oklch(40.1% 0.165 265.2);

Tailwind

colors: {
  custom: {
    50: '#7071bc',
    500: '#1b3c9f',
    950: '#000000',
  },
}

SCSS

$custom: #1b3c9f;
$custom-light: #7071bc;
$custom-dark: #000000;

JSON

{
  "hex": "#1b3c9f",
  "rgb": {
    "r": 27,
    "g": 60,
    "b": 159
  },
  "hsl": {
    "h": 225,
    "s": 70.968,
    "l": 36.471
  },
  "oklch": {
    "l": 0.40079,
    "c": 0.16515,
    "h": 265.2
  },
  "luminance": 0.05968
}

Semantic roles & 50–950 ramp

primary

#1B3C9F

secondary

#C5A851

accent

#C13AEE

background

#F7F6FB

surface

#EDECF6

border

#C8C7D0

text

#090712

muted

#7B7A81

Preview Lab

Preview with #1B3C9F

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

Preview Lab → · Contrast checker → · Palette generator →