#1B528B#1B528B

#1B528B is a dark, moderate cyan. Relative luminance 0.081; OKLCH L 43.4% C 0.110 H 252.5°. Best body text is #FFFFFF at 8.00:1 contrast (WCAG AA passes).

Color values

HEX	#1B528B
RGB	rgb(27, 82, 139)
HSL	hsl(211, 67%, 33%)
HSV	hsv(211, 81%, 55%)
CMYK	cmyk(80.6%, 41%, 0%, 45.5%)
CIE-LAB	lab(34.25, 3.67, -36.74)
CIE-LCH	lch(34.25, 36.92, 275.71°)
OKLab	oklab(43.37% -0.033 -0.1049)
OKLCH	oklch(43.37% 0.11 252.5)
XYZ	xyz(8.1277, 8.1307, 25.5621)
Luminance	0.0813 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B528B #8B541B

analogous

#1B8A8B #1B528B #1C1B8B

triadic

#1B528B #8B1B52 #528B1B

tetradic

#1B528B #8B1B8A #8B541B #1B8B1C

square

#1B528B #8B1B8A #8B541B #1B8B1C

split-complementary

#1B528B #8B1C1B #8A8B1B

monochromatic

#071625 #113458 #1B528B #2570BE #458FDB

Accessibility & contrast

On white

8.00

#1B528B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.63

#1B528B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B528B

8.00:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B528B	#FFFFFF	#000000	##FFFFFF
##1B528B	1.00	8.00	2.63	8.00
#FFFFFF	8.00	1.00	21.00	1.00
#000000	2.63	21.00	1.00	21.00
##FFFFFF	8.00	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#37568D

Deuteranopia (green-blind)

#244C8A

Tritanopia (blue-blind)

#006067

Achromatopsia (no color)

#515151

Design tokens & code

CSS

--color: #1b528b;
/* rgb */ color: rgb(27, 82, 139);
/* oklch */ color: oklch(43.4% 0.110 252.5);

Tailwind

colors: {
  custom: {
    50: '#6a82ad',
    500: '#1b528b',
    950: '#000000',
  },
}

SCSS

$custom: #1b528b;
$custom-light: #6a82ad;
$custom-dark: #000000;

JSON

{
  "hex": "#1b528b",
  "rgb": {
    "r": 27,
    "g": 82,
    "b": 139
  },
  "hsl": {
    "h": 210.536,
    "s": 67.47,
    "l": 32.549
  },
  "oklch": {
    "l": 0.43374,
    "c": 0.11001,
    "h": 252.5
  },
  "luminance": 0.08132
}

Semantic roles & 50–950 ramp

primary

#1B528B

secondary

#BC8245

accent

#953DEA

background

#F6F7FA

surface

#ECEEF4

border

#C7C9CE

text

#070A10

muted

#7A7C7F

Preview Lab

Preview with #1B528B

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

Preview Lab → · Contrast checker → · Palette generator →