#1B517D#1B517D

#1B517D is a dark, moderate cyan. Relative luminance 0.076; OKLCH L 42.2% C 0.092 H 247.1°. Best body text is #FFFFFF at 8.33:1 contrast (WCAG AA passes).

Color values

HEX	#1B517D
RGB	rgb(27, 81, 125)
HSL	hsl(207, 64%, 30%)
HSV	hsv(207, 78%, 49%)
CMYK	cmyk(78.4%, 35.2%, 0%, 51%)
CIE-LAB	lab(33.13, -1.25, -29.90)
CIE-LCH	lch(33.13, 29.93, 267.61°)
OKLab	oklab(42.23% -0.0359 -0.085)
OKLCH	oklch(42.23% 0.092 247.1)
XYZ	xyz(7.0947, 7.5977, 20.4907)
Luminance	0.0760 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B517D #7D471B

analogous

#1B7D78 #1B517D #1B207D

triadic

#1B517D #7D1B51 #517D1B

tetradic

#1B517D #781B7D #7D471B #207D1B

square

#1B517D #781B7D #7D471B #207D1B

split-complementary

#1B517D #7D1B20 #7D781B

monochromatic

#051019 #10304B #1B517D #2672AF #3D91D5

Accessibility & contrast

On white

8.33

#1B517D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.52

#1B517D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B517D

8.33:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B517D	#FFFFFF	#000000	##FFFFFF
##1B517D	1.00	8.33	2.52	8.33
#FFFFFF	8.33	1.00	21.00	1.00
#000000	2.52	21.00	1.00	21.00
##FFFFFF	8.33	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3D537F

Deuteranopia (green-blind)

#2F4A7C

Tritanopia (blue-blind)

#005C61

Achromatopsia (no color)

#4E4E4E

Design tokens & code

CSS

--color: #1b517d;
/* rgb */ color: rgb(27, 81, 125);
/* oklch */ color: oklch(42.2% 0.092 247.1);

Tailwind

colors: {
  custom: {
    50: '#6781a3',
    500: '#1b517d',
    950: '#000000',
  },
}

SCSS

$custom: #1b517d;
$custom-light: #6781a3;
$custom-dark: #000000;

JSON

{
  "hex": "#1b517d",
  "rgb": {
    "r": 27,
    "g": 81,
    "b": 125
  },
  "hsl": {
    "h": 206.939,
    "s": 64.474,
    "l": 29.804
  },
  "oklch": {
    "l": 0.42231,
    "c": 0.09224,
    "h": 247.1
  },
  "luminance": 0.07599
}

Semantic roles & 50–950 ramp

primary

#1B517D

secondary

#B17443

accent

#8B40E7

background

#F6F7FA

surface

#EBEEF3

border

#C6C9CD

text

#070A0F

muted

#7A7C7F

Preview Lab

Preview with #1B517D

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

Preview Lab → · Contrast checker → · Palette generator →