#1B508F#1B508F

#1B508F is a dark, moderate cyan. Relative luminance 0.080; OKLCH L 43.2% C 0.118 H 255.1°. Best body text is #FFFFFF at 8.11:1 contrast (WCAG AA passes).

Color values

HEX	#1B508F
RGB	rgb(27, 80, 143)
HSL	hsl(213, 68%, 33%)
HSV	hsv(213, 81%, 56%)
CMYK	cmyk(81.1%, 44.1%, 0%, 43.9%)
CIE-LAB	lab(33.88, 6.60, -39.77)
CIE-LCH	lch(33.88, 40.31, 279.43°)
OKLab	oklab(43.17% -0.0302 -0.1139)
OKLCH	oklch(43.17% 0.118 255.1)
XYZ	xyz(8.2767, 7.9525, 27.0800)
Luminance	0.0795 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B508F #8F5A1B

analogous

#1B8A8F #1B508F #201B8F

triadic

#1B508F #8F1B50 #508F1B

tetradic

#1B508F #8F1B8A #8F5A1B #1B8F20

square

#1B508F #8F1B8A #8F5A1B #1B8F20

split-complementary

#1B508F #8F201B #8A8F1B

monochromatic

#081628 #11335C #1B508F #256DC2 #488CDC

Accessibility & contrast

On white

8.11

#1B508F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.59

#1B508F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B508F

8.11:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B508F	#FFFFFF	#000000	##FFFFFF
##1B508F	1.00	8.11	2.59	8.11
#FFFFFF	8.11	1.00	21.00	1.00
#000000	2.59	21.00	1.00	21.00
##FFFFFF	8.11	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#305591

Deuteranopia (green-blind)

#1A4B8E

Tritanopia (blue-blind)

#005F68

Achromatopsia (no color)

#505050

Design tokens & code

CSS

--color: #1b508f;
/* rgb */ color: rgb(27, 80, 143);
/* oklch */ color: oklch(43.2% 0.118 255.1);

Tailwind

colors: {
  custom: {
    50: '#6b80b0',
    500: '#1b508f',
    950: '#000000',
  },
}

SCSS

$custom: #1b508f;
$custom-light: #6b80b0;
$custom-dark: #000000;

JSON

{
  "hex": "#1b508f",
  "rgb": {
    "r": 27,
    "g": 80,
    "b": 143
  },
  "hsl": {
    "h": 212.586,
    "s": 68.235,
    "l": 33.333
  },
  "oklch": {
    "l": 0.43166,
    "c": 0.11786,
    "h": 255.1
  },
  "luminance": 0.07954
}

Semantic roles & 50–950 ramp

primary

#1B508F

secondary

#BE8848

accent

#9B3DEB

background

#F6F7FA

surface

#ECEEF5

border

#C7C9CF

text

#080A10

muted

#7A7C7F

Preview Lab

Preview with #1B508F

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

Preview Lab → · Contrast checker → · Palette generator →