#1B375F#1B375F

#1B375F is a dark, moderate blue. Relative luminance 0.038; OKLCH L 33.7% C 0.079 H 257.5°. Best body text is #FFFFFF at 11.94:1 contrast (WCAG AA passes).

Color values

HEX	#1B375F
RGB	rgb(27, 55, 95)
HSL	hsl(215, 56%, 24%)
HSV	hsv(215, 72%, 37%)
CMYK	cmyk(71.6%, 42.1%, 0%, 62.7%)
CIE-LAB	lab(22.97, 4.24, -26.94)
CIE-LCH	lch(22.97, 27.27, 278.94°)
OKLab	oklab(33.71% -0.017 -0.0767)
OKLCH	oklch(33.71% 0.079 257.5)
XYZ	xyz(3.8830, 3.7912, 11.3514)
Luminance	0.0379 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B375F #5F431B

analogous

#1B595F #1B375F #211B5F

triadic

#1B375F #5F1B37 #375F1B

tetradic

#1B375F #5F1B59 #5F431B #1B5F21

square

#1B375F #5F1B59 #5F431B #1B5F21

split-complementary

#1B375F #5F211B #595F1B

monochromatic

#070E18 #0D1B2F #1B375F #29538F #366EBE

Accessibility & contrast

On white

11.94

#1B375F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.76

#1B375F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B375F

11.94:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B375F	#FFFFFF	#000000	##FFFFFF
##1B375F	1.00	11.94	1.76	11.94
#FFFFFF	11.94	1.00	21.00	1.00
#000000	1.76	21.00	1.00	21.00
##FFFFFF	11.94	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#253A61

Deuteranopia (green-blind)

#1B345E

Tritanopia (blue-blind)

#004046

Achromatopsia (no color)

#373737

Design tokens & code

CSS

--color: #1b375f;
/* rgb */ color: rgb(27, 55, 95);
/* oklch */ color: oklch(33.7% 0.079 257.5);

Tailwind

colors: {
  custom: {
    50: '#606d8c',
    500: '#1b375f',
    950: '#000000',
  },
}

SCSS

$custom: #1b375f;
$custom-light: #606d8c;
$custom-dark: #000000;

JSON

{
  "hex": "#1b375f",
  "rgb": {
    "r": 27,
    "g": 55,
    "b": 95
  },
  "hsl": {
    "h": 215.294,
    "s": 55.738,
    "l": 23.922
  },
  "oklch": {
    "l": 0.33706,
    "c": 0.07856,
    "h": 257.5
  },
  "luminance": 0.03792
}

Semantic roles & 50–950 ramp

primary

#1B375F

secondary

#957241

accent

#A149DF

background

#F5F6F8

surface

#EAEBF0

border

#C6C6CB

text

#05070C

muted

#797A7D

Preview Lab

Preview with #1B375F

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

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