#1B3E72#1B3E72

#1B3E72 is a dark, moderate blue. Relative luminance 0.049; OKLCH L 36.8% C 0.098 H 258.3°. Best body text is #FFFFFF at 10.61:1 contrast (WCAG AA passes).

Color values

HEX	#1B3E72
RGB	rgb(27, 62, 114)
HSL	hsl(216, 62%, 28%)
HSV	hsv(216, 76%, 45%)
CMYK	cmyk(76.3%, 45.6%, 0%, 55.3%)
CIE-LAB	lab(26.43, 7.07, -33.66)
CIE-LCH	lch(26.43, 34.40, 281.86°)
OKLab	oklab(36.78% -0.0199 -0.0963)
OKLCH	oklch(36.78% 0.098 258.3)
XYZ	xyz(5.2108, 4.8926, 16.5861)
Luminance	0.0489 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B3E72 #724F1B

analogous

#1B6972 #1B3E72 #231B72

triadic

#1B3E72 #721B3E #3E721B

tetradic

#1B3E72 #721B69 #724F1B #1B7223

square

#1B3E72 #721B69 #724F1B #1B7223

split-complementary

#1B3E72 #72231B #69721B

monochromatic

#060D19 #0F2341 #1B3E72 #2759A3 #3875D0

Accessibility & contrast

On white

10.61

#1B3E72 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.98

#1B3E72 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B3E72

10.61:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B3E72	#FFFFFF	#000000	##FFFFFF
##1B3E72	1.00	10.61	1.98	10.61
#FFFFFF	10.61	1.00	21.00	1.00
#000000	1.98	21.00	1.00	21.00
##FFFFFF	10.61	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#244374

Deuteranopia (green-blind)

#143B71

Tritanopia (blue-blind)

#004A52

Achromatopsia (no color)

#3E3E3E

Design tokens & code

CSS

--color: #1b3e72;
/* rgb */ color: rgb(27, 62, 114);
/* oklch */ color: oklch(36.8% 0.098 258.3);

Tailwind

colors: {
  custom: {
    50: '#64729b',
    500: '#1b3e72',
    950: '#000000',
  },
}

SCSS

$custom: #1b3e72;
$custom-light: #64729b;
$custom-dark: #000000;

JSON

{
  "hex": "#1b3e72",
  "rgb": {
    "r": 27,
    "g": 62,
    "b": 114
  },
  "hsl": {
    "h": 215.862,
    "s": 61.702,
    "l": 27.647
  },
  "oklch": {
    "l": 0.36782,
    "c": 0.09835,
    "h": 258.3
  },
  "luminance": 0.04893
}

Semantic roles & 50–950 ramp

primary

#1B3E72

secondary

#A77E42

accent

#A443E5

background

#F6F6F9

surface

#EBECF2

border

#C6C7CC

text

#06080E

muted

#7A7B7E

Preview Lab

Preview with #1B3E72

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

Preview Lab → · Contrast checker → · Palette generator →