#1B3E75#1B3E75

#1B3E75 is a dark, moderate blue. Relative luminance 0.050; OKLCH L 37.0% C 0.103 H 259.2°. Best body text is #FFFFFF at 10.54:1 contrast (WCAG AA passes).

Color values

HEX	#1B3E75
RGB	rgb(27, 62, 117)
HSL	hsl(217, 63%, 28%)
HSV	hsv(217, 77%, 46%)
CMYK	cmyk(76.9%, 47%, 0%, 54.1%)
CIE-LAB	lab(26.63, 8.30, -35.25)
CIE-LCH	lch(26.63, 36.21, 283.24°)
OKLab	oklab(37% -0.0193 -0.101)
OKLCH	oklch(37% 0.103 259.2)
XYZ	xyz(5.3843, 4.9620, 17.5002)
Luminance	0.0496 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B3E75 #75521B

analogous

#1B6B75 #1B3E75 #251B75

triadic

#1B3E75 #751B3E #3E751B

tetradic

#1B3E75 #751B6B #75521B #1B7525

square

#1B3E75 #751B6B #75521B #1B7525

split-complementary

#1B3E75 #75251B #6B751B

monochromatic

#060D19 #102443 #1B3E75 #2658A7 #3974D1

Accessibility & contrast

On white

10.54

#1B3E75 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.99

#1B3E75 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B3E75

10.54:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B3E75	#FFFFFF	#000000	##FFFFFF
##1B3E75	1.00	10.54	1.99	10.54
#FFFFFF	10.54	1.00	21.00	1.00
#000000	1.99	21.00	1.00	21.00
##FFFFFF	10.54	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#224377

Deuteranopia (green-blind)

#0F3B74

Tritanopia (blue-blind)

#004B53

Achromatopsia (no color)

#3F3F3F

Design tokens & code

CSS

--color: #1b3e75;
/* rgb */ color: rgb(27, 62, 117);
/* oklch */ color: oklch(37.0% 0.103 259.2);

Tailwind

colors: {
  custom: {
    50: '#65729d',
    500: '#1b3e75',
    950: '#000000',
  },
}

SCSS

$custom: #1b3e75;
$custom-light: #65729d;
$custom-dark: #000000;

JSON

{
  "hex": "#1b3e75",
  "rgb": {
    "r": 27,
    "g": 62,
    "b": 117
  },
  "hsl": {
    "h": 216.667,
    "s": 62.5,
    "l": 28.235
  },
  "oklch": {
    "l": 0.37,
    "c": 0.10279,
    "h": 259.2
  },
  "luminance": 0.04963
}

Semantic roles & 50–950 ramp

primary

#1B3E75

secondary

#A98142

accent

#A642E6

background

#F6F6F9

surface

#EBECF2

border

#C6C7CC

text

#06080E

muted

#7A7B7E

Preview Lab

Preview with #1B3E75

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

Preview Lab → · Contrast checker → · Palette generator →