#1B39A1#1B39A1

#1B39A1 is a dark, vivid blue. Relative luminance 0.057; OKLCH L 39.7% C 0.171 H 266.0°. Best body text is #FFFFFF at 9.78:1 contrast (WCAG AA passes).

Color values

HEX	#1B39A1
RGB	rgb(27, 57, 161)
HSL	hsl(227, 71%, 37%)
HSV	hsv(227, 83%, 63%)
CMYK	cmyk(83.2%, 64.6%, 0%, 36.9%)
CIE-LAB	lab(28.72, 29.46, -59.08)
CIE-LCH	lch(28.72, 66.01, 296.50°)
OKLab	oklab(39.69% -0.0121 -0.1711)
OKLCH	oklch(39.69% 0.171 266)
XYZ	xyz(8.3459, 5.7315, 34.3777)
Luminance	0.0573 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B39A1 #A1831B

analogous

#1B7CA1 #1B39A1 #401BA1

triadic

#1B39A1 #A11B39 #39A11B

tetradic

#1B39A1 #A11B7C #A1831B #1BA140

square

#1B39A1 #A11B7C #A1831B #1BA140

split-complementary

#1B39A1 #A1401B #7CA11B

monochromatic

#091438 #12266D #1B39A1 #244CD5 #5474E2

Accessibility & contrast

On white

9.78

#1B39A1 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.15

#1B39A1 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B39A1

9.78:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B39A1	#FFFFFF	#000000	##FFFFFF
##1B39A1	1.00	9.78	2.15	9.78
#FFFFFF	9.78	1.00	21.00	1.00
#000000	2.15	21.00	1.00	21.00
##FFFFFF	9.78	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004AA4

Deuteranopia (green-blind)

#003E9F

Tritanopia (blue-blind)

#005567

Achromatopsia (no color)

#444444

Design tokens & code

CSS

--color: #1b39a1;
/* rgb */ color: rgb(27, 57, 161);
/* oklch */ color: oklch(39.7% 0.171 266.0);

Tailwind

colors: {
  custom: {
    50: '#716fbe',
    500: '#1b39a1',
    950: '#000000',
  },
}

SCSS

$custom: #1b39a1;
$custom-light: #716fbe;
$custom-dark: #000000;

JSON

{
  "hex": "#1b39a1",
  "rgb": {
    "r": 27,
    "g": 57,
    "b": 161
  },
  "hsl": {
    "h": 226.567,
    "s": 71.277,
    "l": 36.863
  },
  "oklch": {
    "l": 0.39686,
    "c": 0.17149,
    "h": 266
  },
  "luminance": 0.05732
}

Semantic roles & 50–950 ramp

primary

#1B39A1

secondary

#C5AC52

accent

#C63AEE

background

#F7F6FB

surface

#EDECF7

border

#C8C7D0

text

#090712

muted

#7B7A81

Preview Lab

Preview with #1B39A1

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

Preview Lab → · Contrast checker → · Palette generator →