#1B357A#1B357A

#1B357A is a dark, vivid blue. Relative luminance 0.042; OKLCH L 35.3% C 0.122 H 265.1°. Best body text is #FFFFFF at 11.43:1 contrast (WCAG AA passes).

Color values

HEX	#1B357A
RGB	rgb(27, 53, 122)
HSL	hsl(224, 64%, 29%)
HSV	hsv(224, 78%, 48%)
CMYK	cmyk(77.9%, 56.6%, 0%, 52.2%)
CIE-LAB	lab(24.27, 16.68, -42.21)
CIE-LCH	lch(24.27, 45.39, 291.56°)
OKLab	oklab(35.32% -0.0105 -0.1216)
OKLCH	oklch(35.32% 0.122 265.1)
XYZ	xyz(5.2367, 4.1838, 18.9401)
Luminance	0.0418 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B357A #7A601B

analogous

#1B657A #1B357A #311B7A

triadic

#1B357A #7A1B35 #357A1B

tetradic

#1B357A #7A1B65 #7A601B #1B7A31

square

#1B357A #7A1B65 #7A601B #1B7A31

split-complementary

#1B357A #7A311B #657A1B

monochromatic

#060B19 #101F48 #1B357A #264BAC #3C65D4

Accessibility & contrast

On white

11.43

#1B357A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.84

#1B357A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B357A

11.43:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B357A	#FFFFFF	#000000	##FFFFFF
##1B357A	1.00	11.43	1.84	11.43
#FFFFFF	11.43	1.00	21.00	1.00
#000000	1.84	21.00	1.00	21.00
##FFFFFF	11.43	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003E7C

Deuteranopia (green-blind)

#003579

Tritanopia (blue-blind)

#004652

Achromatopsia (no color)

#3A3A3A

Design tokens & code

CSS

--color: #1b357a;
/* rgb */ color: rgb(27, 53, 122);
/* oklch */ color: oklch(35.3% 0.122 265.1);

Tailwind

colors: {
  custom: {
    50: '#676ba1',
    500: '#1b357a',
    950: '#000000',
  },
}

SCSS

$custom: #1b357a;
$custom-light: #676ba1;
$custom-dark: #000000;

JSON

{
  "hex": "#1b357a",
  "rgb": {
    "r": 27,
    "g": 53,
    "b": 122
  },
  "hsl": {
    "h": 223.579,
    "s": 63.758,
    "l": 29.216
  },
  "oklch": {
    "l": 0.35317,
    "c": 0.12209,
    "h": 265.1
  },
  "luminance": 0.04184
}

Semantic roles & 50–950 ramp

primary

#1B357A

secondary

#AE9143

accent

#B941E7

background

#F6F6FA

surface

#EBEBF3

border

#C6C6CD

text

#07060F

muted

#7A7A7F

Preview Lab

Preview with #1B357A

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

Preview Lab → · Contrast checker → · Palette generator →