#1B388E#1B388E

#1B388E is a dark, vivid blue. Relative luminance 0.050; OKLCH L 37.7% C 0.147 H 265.5°. Best body text is #FFFFFF at 10.49:1 contrast (WCAG AA passes).

Color values

HEX	#1B388E
RGB	rgb(27, 56, 142)
HSL	hsl(225, 68%, 33%)
HSV	hsv(225, 81%, 56%)
CMYK	cmyk(81%, 60.6%, 0%, 44.3%)
CIE-LAB	lab(26.77, 22.66, -50.65)
CIE-LCH	lch(26.77, 55.48, 294.10°)
OKLab	oklab(37.72% -0.0116 -0.1464)
OKLCH	oklch(37.72% 0.147 265.5)
XYZ	xyz(6.7469, 5.0136, 26.1981)
Luminance	0.0501 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B388E #8E711B

analogous

#1B718E #1B388E #381B8E

triadic

#1B388E #8E1B38 #388E1B

tetradic

#1B388E #8E1B71 #8E711B #1B8E38

square

#1B388E #8E1B71 #8E711B #1B8E38

split-complementary

#1B388E #8E381B #718E1B

monochromatic

#070F27 #11245B #1B388E #254CC1 #476DDC

Accessibility & contrast

On white

10.49

#1B388E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.00

#1B388E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B388E

10.49:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B388E	#FFFFFF	#000000	##FFFFFF
##1B388E	1.00	10.49	2.00	10.49
#FFFFFF	10.49	1.00	21.00	1.00
#000000	2.00	21.00	1.00	21.00
##FFFFFF	10.49	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004591

Deuteranopia (green-blind)

#003A8C

Tritanopia (blue-blind)

#004E5D

Achromatopsia (no color)

#3F3F3F

Design tokens & code

CSS

--color: #1b388e;
/* rgb */ color: rgb(27, 56, 142);
/* oklch */ color: oklch(37.7% 0.147 265.5);

Tailwind

colors: {
  custom: {
    50: '#6c6eb0',
    500: '#1b388e',
    950: '#000000',
  },
}

SCSS

$custom: #1b388e;
$custom-light: #6c6eb0;
$custom-dark: #000000;

JSON

{
  "hex": "#1b388e",
  "rgb": {
    "r": 27,
    "g": 56,
    "b": 142
  },
  "hsl": {
    "h": 224.87,
    "s": 68.047,
    "l": 33.137
  },
  "oklch": {
    "l": 0.37717,
    "c": 0.14683,
    "h": 265.5
  },
  "luminance": 0.05014
}

Semantic roles & 50–950 ramp

primary

#1B388E

secondary

#BEA047

accent

#BF3DEB

background

#F7F6FA

surface

#EDEBF5

border

#C8C6CF

text

#080711

muted

#7B7A80

Preview Lab

Preview with #1B388E

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

Preview Lab → · Contrast checker → · Palette generator →