#1B5178#1B5178

#1B5178 is a dark, moderate cyan. Relative luminance 0.075; OKLCH L 41.9% C 0.086 H 244.1°. Best body text is #FFFFFF at 8.42:1 contrast (WCAG AA passes).

Color values

HEX	#1B5178
RGB	rgb(27, 81, 120)
HSL	hsl(205, 63%, 29%)
HSV	hsv(205, 78%, 47%)
CMYK	cmyk(77.5%, 32.5%, 0%, 52.9%)
CIE-LAB	lab(32.86, -3.21, -27.23)
CIE-LCH	lch(32.86, 27.41, 263.28°)
OKLab	oklab(41.93% -0.0375 -0.0771)
OKLCH	oklch(41.93% 0.086 244.1)
XYZ	xyz(6.7833, 7.4732, 18.8506)
Luminance	0.0747 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B5178 #78421B

analogous

#1B7871 #1B5178 #1B2378

triadic

#1B5178 #781B51 #51781B

tetradic

#1B5178 #711B78 #78421B #23781B

square

#1B5178 #711B78 #78421B #23781B

split-complementary

#1B5178 #781B23 #78711B

monochromatic

#061119 #102F46 #1B5178 #2673AA #3B93D3

Accessibility & contrast

On white

8.42

#1B5178 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.49

#1B5178 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B5178

8.42:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B5178	#FFFFFF	#000000	##FFFFFF
##1B5178	1.00	8.42	2.49	8.42
#FFFFFF	8.42	1.00	21.00	1.00
#000000	2.49	21.00	1.00	21.00
##FFFFFF	8.42	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3F527A

Deuteranopia (green-blind)

#324977

Tritanopia (blue-blind)

#005B5F

Achromatopsia (no color)

#4D4D4D

Design tokens & code

CSS

--color: #1b5178;
/* rgb */ color: rgb(27, 81, 120);
/* oklch */ color: oklch(41.9% 0.086 244.1);

Tailwind

colors: {
  custom: {
    50: '#66819f',
    500: '#1b5178',
    950: '#000000',
  },
}

SCSS

$custom: #1b5178;
$custom-light: #66819f;
$custom-dark: #000000;

JSON

{
  "hex": "#1b5178",
  "rgb": {
    "r": 27,
    "g": 81,
    "b": 120
  },
  "hsl": {
    "h": 205.161,
    "s": 63.265,
    "l": 28.824
  },
  "oklch": {
    "l": 0.4193,
    "c": 0.08579,
    "h": 244.1
  },
  "luminance": 0.07474
}

Semantic roles & 50–950 ramp

primary

#1B5178

secondary

#AC6F43

accent

#8741E6

background

#F6F7F9

surface

#EBEEF2

border

#C6C9CC

text

#060A0E

muted

#7A7C7E

Preview Lab

Preview with #1B5178

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

Preview Lab → · Contrast checker → · Palette generator →