#1B437D#1B437D

#1B437D is a dark, moderate blue. Relative luminance 0.057; OKLCH L 38.8% C 0.108 H 258.1°. Best body text is #FFFFFF at 9.79:1 contrast (WCAG AA passes).

Color values

HEX	#1B437D
RGB	rgb(27, 67, 125)
HSL	hsl(216, 64%, 30%)
HSV	hsv(216, 78%, 49%)
CMYK	cmyk(78.4%, 46.4%, 0%, 51%)
CIE-LAB	lab(28.71, 8.10, -36.93)
CIE-LCH	lch(28.71, 37.81, 282.37°)
OKLab	oklab(38.78% -0.0224 -0.1058)
OKLCH	oklch(38.78% 0.108 258.1)
XYZ	xyz(6.1595, 5.7273, 20.1789)
Luminance	0.0573 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B437D #7D551B

analogous

#1B747D #1B437D #241B7D

triadic

#1B437D #7D1B43 #437D1B

tetradic

#1B437D #7D1B74 #7D551B #1B7D24

square

#1B437D #7D1B74 #7D551B #1B7D24

split-complementary

#1B437D #7D241B #747D1B

monochromatic

#050D19 #10284B #1B437D #265EAF #3D7BD5

Accessibility & contrast

On white

9.79

#1B437D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.15

#1B437D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B437D

9.79:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B437D	#FFFFFF	#000000	##FFFFFF
##1B437D	1.00	9.79	2.15	9.79
#FFFFFF	9.79	1.00	21.00	1.00
#000000	2.15	21.00	1.00	21.00
##FFFFFF	9.79	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#25497F

Deuteranopia (green-blind)

#11407C

Tritanopia (blue-blind)

#00515A

Achromatopsia (no color)

#444444

Design tokens & code

CSS

--color: #1b437d;
/* rgb */ color: rgb(27, 67, 125);
/* oklch */ color: oklch(38.8% 0.108 258.1);

Tailwind

colors: {
  custom: {
    50: '#6776a3',
    500: '#1b437d',
    950: '#000000',
  },
}

SCSS

$custom: #1b437d;
$custom-light: #6776a3;
$custom-dark: #000000;

JSON

{
  "hex": "#1b437d",
  "rgb": {
    "r": 27,
    "g": 67,
    "b": 125
  },
  "hsl": {
    "h": 215.51,
    "s": 64.474,
    "l": 29.804
  },
  "oklch": {
    "l": 0.38785,
    "c": 0.10818,
    "h": 258.1
  },
  "luminance": 0.05728
}

Semantic roles & 50–950 ramp

primary

#1B437D

secondary

#B18443

accent

#A340E7

background

#F6F7FA

surface

#EBEDF4

border

#C6C8CE

text

#07080F

muted

#7A7B7F

Preview Lab

Preview with #1B437D

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

Preview Lab → · Contrast checker → · Palette generator →