#1B439C#1B439C

#1B439C is a dark, vivid blue. Relative luminance 0.066; OKLCH L 41.2% C 0.152 H 263.1°. Best body text is #FFFFFF at 9.01:1 contrast (WCAG AA passes).

Color values

HEX	#1B439C
RGB	rgb(27, 67, 156)
HSL	hsl(221, 70%, 36%)
HSV	hsv(221, 83%, 61%)
CMYK	cmyk(82.7%, 57.1%, 0%, 38.8%)
CIE-LAB	lab(30.99, 20.69, -52.35)
CIE-LCH	lch(30.99, 56.29, 291.56°)
OKLab	oklab(41.24% -0.0182 -0.1512)
OKLCH	oklch(41.24% 0.152 263.1)
XYZ	xyz(8.4577, 6.6466, 32.2832)
Luminance	0.0665 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B439C #9C741B

analogous

#1B839C #1B439C #331B9C

triadic

#1B439C #9C1B43 #439C1B

tetradic

#1B439C #9C1B83 #9C741B #1B9C33

square

#1B439C #9C1B83 #9C741B #1B9C33

split-complementary

#1B439C #9C331B #839C1B

monochromatic

#091634 #122D68 #1B439C #2459D0 #517DE1

Accessibility & contrast

On white

9.01

#1B439C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.33

#1B439C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B439C

9.01:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B439C	#FFFFFF	#000000	##FFFFFF
##1B439C	1.00	9.01	2.33	9.01
#FFFFFF	9.01	1.00	21.00	1.00
#000000	2.33	21.00	1.00	21.00
##FFFFFF	9.01	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004F9F

Deuteranopia (green-blind)

#00439A

Tritanopia (blue-blind)

#005969

Achromatopsia (no color)

#494949

Design tokens & code

CSS

--color: #1b439c;
/* rgb */ color: rgb(27, 67, 156);
/* oklch */ color: oklch(41.2% 0.152 263.1);

Tailwind

colors: {
  custom: {
    50: '#6f76ba',
    500: '#1b439c',
    950: '#000000',
  },
}

SCSS

$custom: #1b439c;
$custom-light: #6f76ba;
$custom-dark: #000000;

JSON

{
  "hex": "#1b439c",
  "rgb": {
    "r": 27,
    "g": 67,
    "b": 156
  },
  "hsl": {
    "h": 221.395,
    "s": 70.492,
    "l": 35.882
  },
  "oklch": {
    "l": 0.41244,
    "c": 0.15227,
    "h": 263.1
  },
  "luminance": 0.06648
}

Semantic roles & 50–950 ramp

primary

#1B439C

secondary

#C39F4F

accent

#B63BED

background

#F7F7FB

surface

#EDEDF6

border

#C8C8D0

text

#090812

muted

#7B7B81

Preview Lab

Preview with #1B439C

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

Preview Lab → · Contrast checker → · Palette generator →