#1B4166#1B4166

#1B4166 is a dark, moderate cyan. Relative luminance 0.050; OKLCH L 36.7% C 0.077 H 250.2°. Best body text is #FFFFFF at 10.53:1 contrast (WCAG AA passes).

Color values

HEX	#1B4166
RGB	rgb(27, 65, 102)
HSL	hsl(210, 58%, 25%)
HSV	hsv(210, 74%, 40%)
CMYK	cmyk(73.5%, 36.3%, 0%, 60%)
CIE-LAB	lab(26.66, 0.18, -25.63)
CIE-LCH	lch(26.66, 25.63, 270.39°)
OKLab	oklab(36.72% -0.0262 -0.0727)
OKLCH	oklch(36.72% 0.077 250.2)
XYZ	xyz(4.7397, 4.9724, 13.2778)
Luminance	0.0497 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B4166 #66401B

analogous

#1B6665 #1B4166 #1B1B66

triadic

#1B4166 #661B41 #41661B

tetradic

#1B4166 #651B66 #66401B #1B661B

square

#1B4166 #651B66 #66401B #1B661B

split-complementary

#1B4166 #661B1B #66651B

monochromatic

#060F18 #0E2236 #1B4166 #286096 #357FC7

Accessibility & contrast

On white

10.53

#1B4166 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.99

#1B4166 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B4166

10.53:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B4166	#FFFFFF	#000000	##FFFFFF
##1B4166	1.00	10.53	1.99	10.53
#FFFFFF	10.53	1.00	21.00	1.00
#000000	1.99	21.00	1.00	21.00
##FFFFFF	10.53	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#304368

Deuteranopia (green-blind)

#263C65

Tritanopia (blue-blind)

#004A4E

Achromatopsia (no color)

#3F3F3F

Design tokens & code

CSS

--color: #1b4166;
/* rgb */ color: rgb(27, 65, 102);
/* oklch */ color: oklch(36.7% 0.077 250.2);

Tailwind

colors: {
  custom: {
    50: '#617592',
    500: '#1b4166',
    950: '#000000',
  },
}

SCSS

$custom: #1b4166;
$custom-light: #617592;
$custom-dark: #000000;

JSON

{
  "hex": "#1b4166",
  "rgb": {
    "r": 27,
    "g": 65,
    "b": 102
  },
  "hsl": {
    "h": 209.6,
    "s": 58.14,
    "l": 25.294
  },
  "oklch": {
    "l": 0.36721,
    "c": 0.07729,
    "h": 250.2
  },
  "luminance": 0.04973
}

Semantic roles & 50–950 ramp

primary

#1B4166

secondary

#9B6E41

accent

#9346E1

background

#F6F7F8

surface

#EBEDF0

border

#C6C8CB

text

#05080D

muted

#7A7B7D

Preview Lab

Preview with #1B4166

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

Preview Lab → · Contrast checker → · Palette generator →