#1B538A#1B538A

#1B538A is a dark, moderate cyan. Relative luminance 0.083; OKLCH L 43.6% C 0.108 H 251.5°. Best body text is #FFFFFF at 7.92:1 contrast (WCAG AA passes).

Color values

HEX	#1B538A
RGB	rgb(27, 83, 138)
HSL	hsl(210, 67%, 32%)
HSV	hsv(210, 80%, 54%)
CMYK	cmyk(80.4%, 39.9%, 0%, 45.9%)
CIE-LAB	lab(34.51, 2.62, -35.72)
CIE-LCH	lch(34.51, 35.82, 274.19°)
OKLab	oklab(43.55% -0.0342 -0.102)
OKLCH	oklch(43.55% 0.108 251.5)
XYZ	xyz(8.1310, 8.2535, 25.2044)
Luminance	0.0825 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B538A #8A521B

analogous

#1B8A8A #1B538A #1B1B8A

triadic

#1B538A #8A1B53 #538A1B

tetradic

#1B538A #8A1B8A #8A521B #1B8A1B

square

#1B538A #8A1B8A #8A521B #1B8A1B

split-complementary

#1B538A #8A1B1B #8A8A1B

monochromatic

#071524 #113457 #1B538A #2572BD #4590DB

Accessibility & contrast

On white

7.92

#1B538A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.65

#1B538A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B538A

7.92:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B538A	#FFFFFF	#000000	##FFFFFF
##1B538A	1.00	7.92	2.65	7.92
#FFFFFF	7.92	1.00	21.00	1.00
#000000	2.65	21.00	1.00	21.00
##FFFFFF	7.92	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#39578C

Deuteranopia (green-blind)

#274D89

Tritanopia (blue-blind)

#006068

Achromatopsia (no color)

#515151

Design tokens & code

CSS

--color: #1b538a;
/* rgb */ color: rgb(27, 83, 138);
/* oklch */ color: oklch(43.6% 0.108 251.5);

Tailwind

colors: {
  custom: {
    50: '#6a82ac',
    500: '#1b538a',
    950: '#000000',
  },
}

SCSS

$custom: #1b538a;
$custom-light: #6a82ac;
$custom-dark: #000000;

JSON

{
  "hex": "#1b538a",
  "rgb": {
    "r": 27,
    "g": 83,
    "b": 138
  },
  "hsl": {
    "h": 209.73,
    "s": 67.273,
    "l": 32.353
  },
  "oklch": {
    "l": 0.43552,
    "c": 0.10754,
    "h": 251.5
  },
  "luminance": 0.08255
}

Semantic roles & 50–950 ramp

primary

#1B538A

secondary

#BC8045

accent

#933EEA

background

#F6F7FA

surface

#ECEEF4

border

#C7C9CE

text

#070A10

muted

#7A7C7F

Preview Lab

Preview with #1B538A

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

Preview Lab → · Contrast checker → · Palette generator →