#1B538F#1B538F

#1B538F is a dark, moderate cyan. Relative luminance 0.084; OKLCH L 43.9% C 0.114 H 253.3°. Best body text is #FFFFFF at 7.83:1 contrast (WCAG AA passes).

Color values

HEX	#1B538F
RGB	rgb(27, 83, 143)
HSL	hsl(211, 68%, 33%)
HSV	hsv(211, 81%, 56%)
CMYK	cmyk(81.1%, 42%, 0%, 43.9%)
CIE-LAB	lab(34.81, 4.62, -38.29)
CIE-LCH	lch(34.81, 38.57, 276.87°)
OKLab	oklab(43.88% -0.0329 -0.1095)
OKLCH	oklch(43.88% 0.114 253.3)
XYZ	xyz(8.5013, 8.4017, 27.1549)
Luminance	0.0840 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B538F #8F571B

analogous

#1B8D8F #1B538F #1D1B8F

triadic

#1B538F #8F1B53 #538F1B

tetradic

#1B538F #8F1B8D #8F571B #1B8F1D

square

#1B538F #8F1B8D #8F571B #1B8F1D

split-complementary

#1B538F #8F1D1B #8D8F1B

monochromatic

#081728 #11355C #1B538F #2571C2 #4890DC

Accessibility & contrast

On white

7.83

#1B538F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.68

#1B538F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B538F

7.83:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B538F	#FFFFFF	#000000	##FFFFFF
##1B538F	1.00	7.83	2.68	7.83
#FFFFFF	7.83	1.00	21.00	1.00
#000000	2.68	21.00	1.00	21.00
##FFFFFF	7.83	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#365891

Deuteranopia (green-blind)

#224D8E

Tritanopia (blue-blind)

#00616A

Achromatopsia (no color)

#525252

Design tokens & code

CSS

--color: #1b538f;
/* rgb */ color: rgb(27, 83, 143);
/* oklch */ color: oklch(43.9% 0.114 253.3);

Tailwind

colors: {
  custom: {
    50: '#6b82b0',
    500: '#1b538f',
    950: '#000000',
  },
}

SCSS

$custom: #1b538f;
$custom-light: #6b82b0;
$custom-dark: #000000;

JSON

{
  "hex": "#1b538f",
  "rgb": {
    "r": 27,
    "g": 83,
    "b": 143
  },
  "hsl": {
    "h": 211.034,
    "s": 68.235,
    "l": 33.333
  },
  "oklch": {
    "l": 0.43884,
    "c": 0.11435,
    "h": 253.3
  },
  "luminance": 0.08403
}

Semantic roles & 50–950 ramp

primary

#1B538F

secondary

#BE8548

accent

#973DEB

background

#F6F7FA

surface

#ECEEF5

border

#C7C9CF

text

#080A10

muted

#7A7C7F

Preview Lab

Preview with #1B538F

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

Preview Lab → · Contrast checker → · Palette generator →