#1B438F#1B438F

#1B438F is a dark, vivid blue. Relative luminance 0.062; OKLCH L 40.2% C 0.134 H 261.6°. Best body text is #FFFFFF at 9.35:1 contrast (WCAG AA passes).

Color values

HEX	#1B438F
RGB	rgb(27, 67, 143)
HSL	hsl(219, 68%, 33%)
HSV	hsv(219, 81%, 56%)
CMYK	cmyk(81.1%, 53.1%, 0%, 43.9%)
CIE-LAB	lab(29.98, 15.44, -46.04)
CIE-LCH	lch(29.98, 48.56, 288.54°)
OKLab	oklab(40.17% -0.0195 -0.1326)
OKLCH	oklch(40.17% 0.134 261.6)
XYZ	xyz(7.4153, 6.2296, 26.7929)
Luminance	0.0623 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B438F #8F671B

analogous

#1B7D8F #1B438F #2D1B8F

triadic

#1B438F #8F1B43 #438F1B

tetradic

#1B438F #8F1B7D #8F671B #1B8F2D

square

#1B438F #8F1B7D #8F671B #1B8F2D

split-complementary

#1B438F #8F2D1B #7D8F1B

monochromatic

#081328 #112B5C #1B438F #255BC2 #487BDC

Accessibility & contrast

On white

9.35

#1B438F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.25

#1B438F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B438F

9.35:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B438F	#FFFFFF	#000000	##FFFFFF
##1B438F	1.00	9.35	2.25	9.35
#FFFFFF	9.35	1.00	21.00	1.00
#000000	2.25	21.00	1.00	21.00
##FFFFFF	9.35	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0E4C92

Deuteranopia (green-blind)

#00428D

Tritanopia (blue-blind)

#005562

Achromatopsia (no color)

#474747

Design tokens & code

CSS

--color: #1b438f;
/* rgb */ color: rgb(27, 67, 143);
/* oklch */ color: oklch(40.2% 0.134 261.6);

Tailwind

colors: {
  custom: {
    50: '#6b76b0',
    500: '#1b438f',
    950: '#000000',
  },
}

SCSS

$custom: #1b438f;
$custom-light: #6b76b0;
$custom-dark: #000000;

JSON

{
  "hex": "#1b438f",
  "rgb": {
    "r": 27,
    "g": 67,
    "b": 143
  },
  "hsl": {
    "h": 219.31,
    "s": 68.235,
    "l": 33.333
  },
  "oklch": {
    "l": 0.40166,
    "c": 0.13406,
    "h": 261.6
  },
  "luminance": 0.0623
}

Semantic roles & 50–950 ramp

primary

#1B438F

secondary

#BE9548

accent

#AF3DEB

background

#F6F7FA

surface

#ECEDF5

border

#C7C8CF

text

#080811

muted

#7A7B80

Preview Lab

Preview with #1B438F

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

Preview Lab → · Contrast checker → · Palette generator →