#1B517F#1B517F

#1B517F is a dark, moderate cyan. Relative luminance 0.076; OKLCH L 42.4% C 0.095 H 248.1°. Best body text is #FFFFFF at 8.30:1 contrast (WCAG AA passes).

Color values

HEX	#1B517F
RGB	rgb(27, 81, 127)
HSL	hsl(208, 65%, 30%)
HSV	hsv(208, 79%, 50%)
CMYK	cmyk(78.7%, 36.2%, 0%, 50.2%)
CIE-LAB	lab(33.24, -0.46, -30.97)
CIE-LCH	lch(33.24, 30.97, 269.16°)
OKLab	oklab(42.36% -0.0353 -0.0881)
OKLCH	oklch(42.36% 0.095 248.1)
XYZ	xyz(7.2237, 7.6493, 21.1703)
Luminance	0.0765 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B517F #7F491B

analogous

#1B7F7B #1B517F #1B1F7F

triadic

#1B517F #7F1B51 #517F1B

tetradic

#1B517F #7B1B7F #7F491B #1F7F1B

square

#1B517F #7B1B7F #7F491B #1F7F1B

split-complementary

#1B517F #7F1B1F #7F7B1B

monochromatic

#06111A #10314D #1B517F #2671B1 #3E90D6

Accessibility & contrast

On white

8.30

#1B517F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.53

#1B517F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B517F

8.30:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B517F	#FFFFFF	#000000	##FFFFFF
##1B517F	1.00	8.30	2.53	8.30
#FFFFFF	8.30	1.00	21.00	1.00
#000000	2.53	21.00	1.00	21.00
##FFFFFF	8.30	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3C5381

Deuteranopia (green-blind)

#2D4A7E

Tritanopia (blue-blind)

#005C62

Achromatopsia (no color)

#4E4E4E

Design tokens & code

CSS

--color: #1b517f;
/* rgb */ color: rgb(27, 81, 127);
/* oklch */ color: oklch(42.4% 0.095 248.1);

Tailwind

colors: {
  custom: {
    50: '#6781a4',
    500: '#1b517f',
    950: '#000000',
  },
}

SCSS

$custom: #1b517f;
$custom-light: #6781a4;
$custom-dark: #000000;

JSON

{
  "hex": "#1b517f",
  "rgb": {
    "r": 27,
    "g": 81,
    "b": 127
  },
  "hsl": {
    "h": 207.6,
    "s": 64.935,
    "l": 30.196
  },
  "oklch": {
    "l": 0.42355,
    "c": 0.09488,
    "h": 248.1
  },
  "luminance": 0.0765
}

Semantic roles & 50–950 ramp

primary

#1B517F

secondary

#B37643

accent

#8D40E8

background

#F6F7FA

surface

#EBEEF4

border

#C6C9CE

text

#070A0F

muted

#7A7C7F

Preview Lab

Preview with #1B517F

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

Preview Lab → · Contrast checker → · Palette generator →