#1B439F#1B439F

#1B439F is a dark, vivid blue. Relative luminance 0.068; OKLCH L 41.5% C 0.156 H 263.4°. Best body text is #FFFFFF at 8.94:1 contrast (WCAG AA passes).

Color values

HEX	#1B439F
RGB	rgb(27, 67, 159)
HSL	hsl(222, 71%, 36%)
HSV	hsv(222, 83%, 62%)
CMYK	cmyk(83%, 57.9%, 0%, 37.6%)
CIE-LAB	lab(31.23, 21.89, -53.77)
CIE-LCH	lch(31.23, 58.06, 292.15°)
OKLab	oklab(41.5% -0.018 -0.1554)
OKLCH	oklch(41.5% 0.156 263.4)
XYZ	xyz(8.7149, 6.7495, 33.6376)
Luminance	0.0675 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B439F #9F771B

analogous

#1B859F #1B439F #351B9F

triadic

#1B439F #9F1B43 #439F1B

tetradic

#1B439F #9F1B85 #9F771B #1B9F35

square

#1B439F #9F1B85 #9F771B #1B9F35

split-complementary

#1B439F #9F351B #859F1B

monochromatic

#091736 #122D6B #1B439F #2459D3 #537EE2

Accessibility & contrast

On white

8.94

#1B439F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.35

#1B439F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B439F

8.94:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B439F	#FFFFFF	#000000	##FFFFFF
##1B439F	1.00	8.94	2.35	8.94
#FFFFFF	8.94	1.00	21.00	1.00
#000000	2.35	21.00	1.00	21.00
##FFFFFF	8.94	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0050A2

Deuteranopia (green-blind)

#00449D

Tritanopia (blue-blind)

#005A6A

Achromatopsia (no color)

#494949

Design tokens & code

CSS

--color: #1b439f;
/* rgb */ color: rgb(27, 67, 159);
/* oklch */ color: oklch(41.5% 0.156 263.4);

Tailwind

colors: {
  custom: {
    50: '#6f76bc',
    500: '#1b439f',
    950: '#000000',
  },
}

SCSS

$custom: #1b439f;
$custom-light: #6f76bc;
$custom-dark: #000000;

JSON

{
  "hex": "#1b439f",
  "rgb": {
    "r": 27,
    "g": 67,
    "b": 159
  },
  "hsl": {
    "h": 221.818,
    "s": 70.968,
    "l": 36.471
  },
  "oklch": {
    "l": 0.41501,
    "c": 0.1564,
    "h": 263.4
  },
  "luminance": 0.06751
}

Semantic roles & 50–950 ramp

primary

#1B439F

secondary

#C5A251

accent

#B73AEE

background

#F7F7FB

surface

#EDEDF6

border

#C8C8D0

text

#090812

muted

#7B7B81

Preview Lab

Preview with #1B439F

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

Preview Lab → · Contrast checker → · Palette generator →