#1B437E#1B437E

#1B437E is a dark, moderate blue. Relative luminance 0.058; OKLCH L 38.9% C 0.110 H 258.3°. Best body text is #FFFFFF at 9.76:1 contrast (WCAG AA passes).

Color values

HEX	#1B437E
RGB	rgb(27, 67, 126)
HSL	hsl(216, 65%, 30%)
HSV	hsv(216, 79%, 49%)
CMYK	cmyk(78.6%, 46.8%, 0%, 50.6%)
CIE-LAB	lab(28.78, 8.51, -37.45)
CIE-LCH	lch(28.78, 38.41, 282.80°)
OKLab	oklab(38.86% -0.0222 -0.1074)
OKLCH	oklch(38.86% 0.11 258.3)
XYZ	xyz(6.2237, 5.7530, 20.5170)
Luminance	0.0575 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B437E #7E561B

analogous

#1B747E #1B437E #251B7E

triadic

#1B437E #7E1B43 #437E1B

tetradic

#1B437E #7E1B74 #7E561B #1B7E25

square

#1B437E #7E1B74 #7E561B #1B7E25

split-complementary

#1B437E #7E251B #747E1B

monochromatic

#050D19 #10284C #1B437E #265EB0 #3E7BD6

Accessibility & contrast

On white

9.76

#1B437E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.15

#1B437E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B437E

9.76:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B437E	#FFFFFF	#000000	##FFFFFF
##1B437E	1.00	9.76	2.15	9.76
#FFFFFF	9.76	1.00	21.00	1.00
#000000	2.15	21.00	1.00	21.00
##FFFFFF	9.76	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#244980

Deuteranopia (green-blind)

#0F407D

Tritanopia (blue-blind)

#00515A

Achromatopsia (no color)

#444444

Design tokens & code

CSS

--color: #1b437e;
/* rgb */ color: rgb(27, 67, 126);
/* oklch */ color: oklch(38.9% 0.110 258.3);

Tailwind

colors: {
  custom: {
    50: '#6776a4',
    500: '#1b437e',
    950: '#000000',
  },
}

SCSS

$custom: #1b437e;
$custom-light: #6776a4;
$custom-dark: #000000;

JSON

{
  "hex": "#1b437e",
  "rgb": {
    "r": 27,
    "g": 67,
    "b": 126
  },
  "hsl": {
    "h": 215.758,
    "s": 64.706,
    "l": 30
  },
  "oklch": {
    "l": 0.38858,
    "c": 0.10962,
    "h": 258.3
  },
  "luminance": 0.05754
}

Semantic roles & 50–950 ramp

primary

#1B437E

secondary

#B28543

accent

#A440E8

background

#F6F7FA

surface

#EBEDF4

border

#C6C8CE

text

#07080F

muted

#7A7B7F

Preview Lab

Preview with #1B437E

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

Preview Lab → · Contrast checker → · Palette generator →