#1B28A0#1B28A0

#1B28A0 is a dark, vivid blue. Relative luminance 0.043; OKLCH L 36.7% C 0.189 H 268.6°. Best body text is #FFFFFF at 11.30:1 contrast (WCAG AA passes).

Color values

HEX	#1B28A0
RGB	rgb(27, 40, 160)
HSL	hsl(234, 71%, 37%)
HSV	hsv(234, 83%, 63%)
CMYK	cmyk(83.1%, 75%, 0%, 37.3%)
CIE-LAB	lab(24.60, 39.97, -65.26)
CIE-LCH	lch(24.60, 76.52, 301.48°)
OKLab	oklab(36.66% -0.0048 -0.1891)
OKLCH	oklch(36.66% 0.189 268.6)
XYZ	xyz(7.5538, 4.2878, 33.6804)
Luminance	0.0429 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B28A0 #A0931B

analogous

#1B6BA0 #1B28A0 #501BA0

triadic

#1B28A0 #A01B28 #28A01B

tetradic

#1B28A0 #A01B6B #A0931B #1BA050

square

#1B28A0 #A01B6B #A0931B #1BA050

split-complementary

#1B28A0 #A0501B #6BA01B

monochromatic

#090E37 #121B6C #1B28A0 #2435D4 #5361E2

Accessibility & contrast

On white

11.30

#1B28A0 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.86

#1B28A0 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B28A0

11.30:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B28A0	#FFFFFF	#000000	##FFFFFF
##1B28A0	1.00	11.30	1.86	11.30
#FFFFFF	11.30	1.00	21.00	1.00
#000000	1.86	21.00	1.00	21.00
##FFFFFF	11.30	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0041A4

Deuteranopia (green-blind)

#00349E

Tritanopia (blue-blind)

#004B62

Achromatopsia (no color)

#3A3A3A

Design tokens & code

CSS

--color: #1b28a0;
/* rgb */ color: rgb(27, 40, 160);
/* oklch */ color: oklch(36.7% 0.189 268.6);

Tailwind

colors: {
  custom: {
    50: '#7263bd',
    500: '#1b28a0',
    950: '#000000',
  },
}

SCSS

$custom: #1b28a0;
$custom-light: #7263bd;
$custom-dark: #000000;

JSON

{
  "hex": "#1b28a0",
  "rgb": {
    "r": 27,
    "g": 40,
    "b": 160
  },
  "hsl": {
    "h": 234.135,
    "s": 71.123,
    "l": 36.667
  },
  "oklch": {
    "l": 0.36661,
    "c": 0.18917,
    "h": 268.6
  },
  "luminance": 0.04289
}

Semantic roles & 50–950 ramp

primary

#1B28A0

secondary

#C5BA52

accent

#DC3AEE

background

#F7F5FB

surface

#EEEAF7

border

#C9C6D0

text

#0A0512

muted

#7C7981

Preview Lab

Preview with #1B28A0

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

Preview Lab → · Contrast checker → · Palette generator →