#1B437C#1B437C

#1B437C is a dark, moderate blue. Relative luminance 0.057; OKLCH L 38.7% C 0.107 H 257.8°. Best body text is #FFFFFF at 9.81:1 contrast (WCAG AA passes).

Color values

HEX	#1B437C
RGB	rgb(27, 67, 124)
HSL	hsl(215, 64%, 30%)
HSV	hsv(215, 78%, 49%)
CMYK	cmyk(78.2%, 46%, 0%, 51.4%)
CIE-LAB	lab(28.65, 7.69, -36.41)
CIE-LCH	lch(28.65, 37.22, 281.93°)
OKLab	oklab(38.71% -0.0226 -0.1043)
OKLCH	oklch(38.71% 0.107 257.8)
XYZ	xyz(6.0959, 5.7019, 19.8442)
Luminance	0.0570 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B437C #7C541B

analogous

#1B737C #1B437C #241B7C

triadic

#1B437C #7C1B43 #437C1B

tetradic

#1B437C #7C1B73 #7C541B #1B7C24

square

#1B437C #7C1B73 #7C541B #1B7C24

split-complementary

#1B437C #7C241B #737C1B

monochromatic

#050E19 #10284A #1B437C #265EAE #3D7BD5

Accessibility & contrast

On white

9.81

#1B437C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.14

#1B437C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B437C

9.81:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B437C	#FFFFFF	#000000	##FFFFFF
##1B437C	1.00	9.81	2.14	9.81
#FFFFFF	9.81	1.00	21.00	1.00
#000000	2.14	21.00	1.00	21.00
##FFFFFF	9.81	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#26487E

Deuteranopia (green-blind)

#133F7B

Tritanopia (blue-blind)

#005059

Achromatopsia (no color)

#444444

Design tokens & code

CSS

--color: #1b437c;
/* rgb */ color: rgb(27, 67, 124);
/* oklch */ color: oklch(38.7% 0.107 257.8);

Tailwind

colors: {
  custom: {
    50: '#6676a2',
    500: '#1b437c',
    950: '#000000',
  },
}

SCSS

$custom: #1b437c;
$custom-light: #6676a2;
$custom-dark: #000000;

JSON

{
  "hex": "#1b437c",
  "rgb": {
    "r": 27,
    "g": 67,
    "b": 124
  },
  "hsl": {
    "h": 215.258,
    "s": 64.238,
    "l": 29.608
  },
  "oklch": {
    "l": 0.38712,
    "c": 0.10672,
    "h": 257.8
  },
  "luminance": 0.05703
}

Semantic roles & 50–950 ramp

primary

#1B437C

secondary

#B08343

accent

#A341E7

background

#F6F7FA

surface

#EBEDF3

border

#C6C8CD

text

#07080F

muted

#7A7B7F

Preview Lab

Preview with #1B437C

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

Preview Lab → · Contrast checker → · Palette generator →