#1B387E#1B387E

#1B387E is a dark, vivid blue. Relative luminance 0.046; OKLCH L 36.3% C 0.124 H 264.2°. Best body text is #FFFFFF at 10.97:1 contrast (WCAG AA passes).

Color values

HEX	#1B387E
RGB	rgb(27, 56, 126)
HSL	hsl(222, 65%, 30%)
HSV	hsv(222, 79%, 49%)
CMYK	cmyk(78.6%, 55.6%, 0%, 50.6%)
CIE-LAB	lab(25.46, 16.19, -42.80)
CIE-LCH	lch(25.46, 45.76, 290.72°)
OKLab	oklab(36.32% -0.0126 -0.1233)
OKLCH	oklch(36.32% 0.124 264.2)
XYZ	xyz(5.6307, 4.5671, 20.3194)
Luminance	0.0457 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B387E #7E611B

analogous

#1B6A7E #1B387E #2F1B7E

triadic

#1B387E #7E1B38 #387E1B

tetradic

#1B387E #7E1B6A #7E611B #1B7E2F

square

#1B387E #7E1B6A #7E611B #1B7E2F

split-complementary

#1B387E #7E2F1B #6A7E1B

monochromatic

#050B19 #10224C #1B387E #264EB0 #3E6AD6

Accessibility & contrast

On white

10.97

#1B387E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.91

#1B387E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B387E

10.97:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B387E	#FFFFFF	#000000	##FFFFFF
##1B387E	1.00	10.97	1.91	10.97
#FFFFFF	10.97	1.00	21.00	1.00
#000000	1.91	21.00	1.00	21.00
##FFFFFF	10.97	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#024180

Deuteranopia (green-blind)

#00387D

Tritanopia (blue-blind)

#004955

Achromatopsia (no color)

#3C3C3C

Design tokens & code

CSS

--color: #1b387e;
/* rgb */ color: rgb(27, 56, 126);
/* oklch */ color: oklch(36.3% 0.124 264.2);

Tailwind

colors: {
  custom: {
    50: '#676ea4',
    500: '#1b387e',
    950: '#000000',
  },
}

SCSS

$custom: #1b387e;
$custom-light: #676ea4;
$custom-dark: #000000;

JSON

{
  "hex": "#1b387e",
  "rgb": {
    "r": 27,
    "g": 56,
    "b": 126
  },
  "hsl": {
    "h": 222.424,
    "s": 64.706,
    "l": 30
  },
  "oklch": {
    "l": 0.3632,
    "c": 0.12396,
    "h": 264.2
  },
  "luminance": 0.04568
}

Semantic roles & 50–950 ramp

primary

#1B387E

secondary

#B29143

accent

#B740E8

background

#F6F6FA

surface

#EBEBF4

border

#C6C6CE

text

#07070F

muted

#7A7A7F

Preview Lab

Preview with #1B387E

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

Preview Lab → · Contrast checker → · Palette generator →