#1B4D71#1B4D71

#1B4D71 is a dark, moderate cyan. Relative luminance 0.067; OKLCH L 40.5% C 0.080 H 243.7°. Best body text is #FFFFFF at 8.95:1 contrast (WCAG AA passes).

Color values

HEX	#1B4D71
RGB	rgb(27, 77, 113)
HSL	hsl(205, 61%, 27%)
HSV	hsv(205, 76%, 44%)
CMYK	cmyk(76.1%, 31.9%, 0%, 55.7%)
CIE-LAB	lab(31.19, -3.38, -25.48)
CIE-LCH	lch(31.19, 25.70, 262.45°)
OKLab	oklab(40.49% -0.0356 -0.0721)
OKLCH	oklch(40.49% 0.08 243.7)
XYZ	xyz(6.0854, 6.7323, 16.5983)
Luminance	0.0673 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B4D71 #713F1B

analogous

#1B716A #1B4D71 #1B2271

triadic

#1B4D71 #711B4D #4D711B

tetradic

#1B4D71 #6A1B71 #713F1B #22711B

square

#1B4D71 #6A1B71 #713F1B #22711B

split-complementary

#1B4D71 #711B22 #716A1B

monochromatic

#061119 #0F2B40 #1B4D71 #276FA2 #3790CF

Accessibility & contrast

On white

8.95

#1B4D71 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.35

#1B4D71 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B4D71

8.95:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B4D71	#FFFFFF	#000000	##FFFFFF
##1B4D71	1.00	8.95	2.35	8.95
#FFFFFF	8.95	1.00	21.00	1.00
#000000	2.35	21.00	1.00	21.00
##FFFFFF	8.95	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3D4E73

Deuteranopia (green-blind)

#314670

Tritanopia (blue-blind)

#00565A

Achromatopsia (no color)

#494949

Design tokens & code

CSS

--color: #1b4d71;
/* rgb */ color: rgb(27, 77, 113);
/* oklch */ color: oklch(40.5% 0.080 243.7);

Tailwind

colors: {
  custom: {
    50: '#647e9a',
    500: '#1b4d71',
    950: '#000000',
  },
}

SCSS

$custom: #1b4d71;
$custom-light: #647e9a;
$custom-dark: #000000;

JSON

{
  "hex": "#1b4d71",
  "rgb": {
    "r": 27,
    "g": 77,
    "b": 113
  },
  "hsl": {
    "h": 205.116,
    "s": 61.429,
    "l": 27.451
  },
  "oklch": {
    "l": 0.40488,
    "c": 0.08044,
    "h": 243.7
  },
  "luminance": 0.06733
}

Semantic roles & 50–950 ramp

primary

#1B4D71

secondary

#A66C42

accent

#8743E5

background

#F6F7F9

surface

#EBEEF2

border

#C6C9CC

text

#060A0E

muted

#7A7C7E

Preview Lab

Preview with #1B4D71

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

Preview Lab → · Contrast checker → · Palette generator →