#1B3E7F#1B3E7F

#1B3E7F is a dark, moderate blue. Relative luminance 0.052; OKLCH L 37.8% C 0.118 H 261.4°. Best body text is #FFFFFF at 10.28:1 contrast (WCAG AA passes).

Color values

HEX	#1B3E7F
RGB	rgb(27, 62, 127)
HSL	hsl(219, 65%, 30%)
HSV	hsv(219, 79%, 50%)
CMYK	cmyk(78.7%, 51.2%, 0%, 50.2%)
CIE-LAB	lab(27.32, 12.39, -40.42)
CIE-LCH	lch(27.32, 42.28, 287.04°)
OKLab	oklab(37.76% -0.0175 -0.1162)
OKLCH	oklch(37.76% 0.118 261.4)
XYZ	xyz(6.0040, 5.2099, 20.7637)
Luminance	0.0521 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B3E7F #7F5C1B

analogous

#1B707F #1B3E7F #2A1B7F

triadic

#1B3E7F #7F1B3E #3E7F1B

tetradic

#1B3E7F #7F1B70 #7F5C1B #1B7F2A

square

#1B3E7F #7F1B70 #7F5C1B #1B7F2A

split-complementary

#1B3E7F #7F2A1B #707F1B

monochromatic

#060D1A #10254D #1B3E7F #2657B1 #3E73D6

Accessibility & contrast

On white

10.28

#1B3E7F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.04

#1B3E7F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B3E7F

10.28:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B3E7F	#FFFFFF	#000000	##FFFFFF
##1B3E7F	1.00	10.28	2.04	10.28
#FFFFFF	10.28	1.00	21.00	1.00
#000000	2.04	21.00	1.00	21.00
##FFFFFF	10.28	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#184581

Deuteranopia (green-blind)

#003C7E

Tritanopia (blue-blind)

#004E58

Achromatopsia (no color)

#414141

Design tokens & code

CSS

--color: #1b3e7f;
/* rgb */ color: rgb(27, 62, 127);
/* oklch */ color: oklch(37.8% 0.118 261.4);

Tailwind

colors: {
  custom: {
    50: '#6772a5',
    500: '#1b3e7f',
    950: '#000000',
  },
}

SCSS

$custom: #1b3e7f;
$custom-light: #6772a5;
$custom-dark: #000000;

JSON

{
  "hex": "#1b3e7f",
  "rgb": {
    "r": 27,
    "g": 62,
    "b": 127
  },
  "hsl": {
    "h": 219,
    "s": 64.935,
    "l": 30.196
  },
  "oklch": {
    "l": 0.37761,
    "c": 0.11751,
    "h": 261.4
  },
  "luminance": 0.05211
}

Semantic roles & 50–950 ramp

primary

#1B3E7F

secondary

#B38C43

accent

#AD40E8

background

#F6F6FA

surface

#EBECF4

border

#C6C7CE

text

#07080F

muted

#7A7B7F

Preview Lab

Preview with #1B3E7F

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

Preview Lab → · Contrast checker → · Palette generator →