#1B436F#1B436F

#1B436F is a dark, moderate cyan. Relative luminance 0.054; OKLCH L 37.8% C 0.088 H 253.0°. Best body text is #FFFFFF at 10.10:1 contrast (WCAG AA passes).

Color values

HEX	#1B436F
RGB	rgb(27, 67, 111)
HSL	hsl(211, 61%, 27%)
HSV	hsv(211, 76%, 44%)
CMYK	cmyk(75.7%, 39.6%, 0%, 56.5%)
CIE-LAB	lab(27.83, 2.43, -29.52)
CIE-LCH	lch(27.83, 29.62, 274.70°)
OKLab	oklab(37.81% -0.0257 -0.0841)
OKLCH	oklch(37.81% 0.088 253)
XYZ	xyz(5.3273, 5.3944, 15.7963)
Luminance	0.0539 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B436F #6F471B

analogous

#1B6D6F #1B436F #1D1B6F

triadic

#1B436F #6F1B43 #436F1B

tetradic

#1B436F #6F1B6D #6F471B #1B6F1D

square

#1B436F #6F1B6D #6F471B #1B6F1D

split-complementary

#1B436F #6F1D1B #6D6F1B

monochromatic

#060F19 #0F253E #1B436F #2761A0 #367FCE

Accessibility & contrast

On white

10.10

#1B436F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.08

#1B436F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B436F

10.10:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B436F	#FFFFFF	#000000	##FFFFFF
##1B436F	1.00	10.10	2.08	10.10
#FFFFFF	10.10	1.00	21.00	1.00
#000000	2.08	21.00	1.00	21.00
##FFFFFF	10.10	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2F4671

Deuteranopia (green-blind)

#223E6E

Tritanopia (blue-blind)

#004D53

Achromatopsia (no color)

#424242

Design tokens & code

CSS

--color: #1b436f;
/* rgb */ color: rgb(27, 67, 111);
/* oklch */ color: oklch(37.8% 0.088 253.0);

Tailwind

colors: {
  custom: {
    50: '#637698',
    500: '#1b436f',
    950: '#000000',
  },
}

SCSS

$custom: #1b436f;
$custom-light: #637698;
$custom-dark: #000000;

JSON

{
  "hex": "#1b436f",
  "rgb": {
    "r": 27,
    "g": 67,
    "b": 111
  },
  "hsl": {
    "h": 211.429,
    "s": 60.87,
    "l": 27.059
  },
  "oklch": {
    "l": 0.37812,
    "c": 0.08791,
    "h": 253
  },
  "luminance": 0.05395
}

Semantic roles & 50–950 ramp

primary

#1B436F

secondary

#A47542

accent

#9844E4

background

#F6F7F9

surface

#EBEDF2

border

#C6C8CC

text

#06080E

muted

#7A7B7E

Preview Lab

Preview with #1B436F

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

Preview Lab → · Contrast checker → · Palette generator →