#1B375D#1B375D

#1B375D is a dark, moderate cyan. Relative luminance 0.038; OKLCH L 33.6% C 0.075 H 256.6°. Best body text is #FFFFFF at 11.99:1 contrast (WCAG AA passes).

Color values

HEX	#1B375D
RGB	rgb(27, 55, 93)
HSL	hsl(215, 55%, 24%)
HSV	hsv(215, 71%, 36%)
CMYK	cmyk(71%, 40.9%, 0%, 63.5%)
CIE-LAB	lab(22.85, 3.43, -25.83)
CIE-LCH	lch(22.85, 26.06, 277.57°)
OKLab	oklab(33.57% -0.0175 -0.0734)
OKLCH	oklch(33.57% 0.076 256.6)
XYZ	xyz(3.7933, 3.7553, 10.8787)
Luminance	0.0376 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B375D #5D411B

analogous

#1B585D #1B375D #201B5D

triadic

#1B375D #5D1B37 #375D1B

tetradic

#1B375D #5D1B58 #5D411B #1B5D20

square

#1B375D #5D1B58 #5D411B #1B5D20

split-complementary

#1B375D #5D201B #585D1B

monochromatic

#070E18 #0D1B2E #1B375D #29538C #376FBC

Accessibility & contrast

On white

11.99

#1B375D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.75

#1B375D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B375D

11.99:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B375D	#FFFFFF	#000000	##FFFFFF
##1B375D	1.00	11.99	1.75	11.99
#FFFFFF	11.99	1.00	21.00	1.00
#000000	1.75	21.00	1.00	21.00
##FFFFFF	11.99	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#263A5F

Deuteranopia (green-blind)

#1D345C

Tritanopia (blue-blind)

#004045

Achromatopsia (no color)

#373737

Design tokens & code

CSS

--color: #1b375d;
/* rgb */ color: rgb(27, 55, 93);
/* oklch */ color: oklch(33.6% 0.075 256.6);

Tailwind

colors: {
  custom: {
    50: '#606d8b',
    500: '#1b375d',
    950: '#000000',
  },
}

SCSS

$custom: #1b375d;
$custom-light: #606d8b;
$custom-dark: #000000;

JSON

{
  "hex": "#1b375d",
  "rgb": {
    "r": 27,
    "g": 55,
    "b": 93
  },
  "hsl": {
    "h": 214.545,
    "s": 55,
    "l": 23.529
  },
  "oklch": {
    "l": 0.3357,
    "c": 0.0755,
    "h": 256.6
  },
  "luminance": 0.03756
}

Semantic roles & 50–950 ramp

primary

#1B375D

secondary

#937041

accent

#9F49DE

background

#F5F6F8

surface

#EAEBF0

border

#C6C6CB

text

#05070C

muted

#797A7D

Preview Lab

Preview with #1B375D

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

Preview Lab → · Contrast checker → · Palette generator →