#1B318E#1B318E

#1B318E is a dark, vivid blue. Relative luminance 0.044; OKLCH L 36.3% C 0.156 H 267.3°. Best body text is #FFFFFF at 11.19:1 contrast (WCAG AA passes).

Color values

HEX	#1B318E
RGB	rgb(27, 49, 142)
HSL	hsl(229, 68%, 33%)
HSV	hsv(229, 81%, 56%)
CMYK	cmyk(81%, 65.5%, 0%, 44.3%)
CIE-LAB	lab(24.90, 27.47, -53.72)
CIE-LCH	lch(24.90, 60.33, 297.08°)
OKLab	oklab(36.32% -0.0072 -0.1555)
OKLCH	oklch(36.32% 0.156 267.3)
XYZ	xyz(6.4311, 4.3819, 26.0928)
Luminance	0.0438 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B318E #8E781B

analogous

#1B6A8E #1B318E #3F1B8E

triadic

#1B318E #8E1B31 #318E1B

tetradic

#1B318E #8E1B6A #8E781B #1B8E3F

square

#1B318E #8E1B6A #8E781B #1B8E3F

split-complementary

#1B318E #8E3F1B #6A8E1B

monochromatic

#070E27 #111F5B #1B318E #2543C1 #4764DC

Accessibility & contrast

On white

11.19

#1B318E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.88

#1B318E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B318E

11.19:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B318E	#FFFFFF	#000000	##FFFFFF
##1B318E	1.00	11.19	1.88	11.19
#FFFFFF	11.19	1.00	21.00	1.00
#000000	1.88	21.00	1.00	21.00
##FFFFFF	11.19	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004191

Deuteranopia (green-blind)

#00368C

Tritanopia (blue-blind)

#004A5B

Achromatopsia (no color)

#3B3B3B

Design tokens & code

CSS

--color: #1b318e;
/* rgb */ color: rgb(27, 49, 142);
/* oklch */ color: oklch(36.3% 0.156 267.3);

Tailwind

colors: {
  custom: {
    50: '#6c69b0',
    500: '#1b318e',
    950: '#000000',
  },
}

SCSS

$custom: #1b318e;
$custom-light: #6c69b0;
$custom-dark: #000000;

JSON

{
  "hex": "#1b318e",
  "rgb": {
    "r": 27,
    "g": 49,
    "b": 142
  },
  "hsl": {
    "h": 228.522,
    "s": 68.047,
    "l": 33.137
  },
  "oklch": {
    "l": 0.36323,
    "c": 0.15563,
    "h": 267.3
  },
  "luminance": 0.04383
}

Semantic roles & 50–950 ramp

primary

#1B318E

secondary

#BEA747

accent

#CA3DEB

background

#F7F6FA

surface

#EDEBF5

border

#C8C6CF

text

#080611

muted

#7B7A80

Preview Lab

Preview with #1B318E

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

Preview Lab → · Contrast checker → · Palette generator →