#1B438B#1B438B

#1B438B is a dark, vivid blue. Relative luminance 0.061; OKLCH L 39.8% C 0.128 H 261.0°. Best body text is #FFFFFF at 9.45:1 contrast (WCAG AA passes).

Color values

HEX	#1B438B
RGB	rgb(27, 67, 139)
HSL	hsl(219, 67%, 33%)
HSV	hsv(219, 81%, 55%)
CMYK	cmyk(80.6%, 51.8%, 0%, 45.5%)
CIE-LAB	lab(29.69, 13.81, -44.06)
CIE-LCH	lch(29.69, 46.17, 287.41°)
OKLab	oklab(39.85% -0.02 -0.1268)
OKLCH	oklch(39.85% 0.128 261)
XYZ	xyz(7.1177, 6.1106, 25.2254)
Luminance	0.0611 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B438B #8B631B

analogous

#1B7B8B #1B438B #2B1B8B

triadic

#1B438B #8B1B43 #438B1B

tetradic

#1B438B #8B1B7B #8B631B #1B8B2B

square

#1B438B #8B1B7B #8B631B #1B8B2B

split-complementary

#1B438B #8B2B1B #7B8B1B

monochromatic

#071225 #112A58 #1B438B #255CBE #457BDB

Accessibility & contrast

On white

9.45

#1B438B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.22

#1B438B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B438B

9.45:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B438B	#FFFFFF	#000000	##FFFFFF
##1B438B	1.00	9.45	2.22	9.45
#FFFFFF	9.45	1.00	21.00	1.00
#000000	2.22	21.00	1.00	21.00
##FFFFFF	9.45	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#164B8E

Deuteranopia (green-blind)

#00418A

Tritanopia (blue-blind)

#005460

Achromatopsia (no color)

#464646

Design tokens & code

CSS

--color: #1b438b;
/* rgb */ color: rgb(27, 67, 139);
/* oklch */ color: oklch(39.8% 0.128 261.0);

Tailwind

colors: {
  custom: {
    50: '#6a76ad',
    500: '#1b438b',
    950: '#000000',
  },
}

SCSS

$custom: #1b438b;
$custom-light: #6a76ad;
$custom-dark: #000000;

JSON

{
  "hex": "#1b438b",
  "rgb": {
    "r": 27,
    "g": 67,
    "b": 139
  },
  "hsl": {
    "h": 218.571,
    "s": 67.47,
    "l": 32.549
  },
  "oklch": {
    "l": 0.39847,
    "c": 0.12837,
    "h": 261
  },
  "luminance": 0.06111
}

Semantic roles & 50–950 ramp

primary

#1B438B

secondary

#BC9245

accent

#AD3DEA

background

#F6F7FA

surface

#ECEDF4

border

#C7C8CE

text

#070810

muted

#7A7B7F

Preview Lab

Preview with #1B438B

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

Preview Lab → · Contrast checker → · Palette generator →