#1B5C83#1B5C83

#1B5C83 is a mid, moderate cyan. Relative luminance 0.095; OKLCH L 45.4% C 0.090 H 240.0°. Best body text is #FFFFFF at 7.23:1 contrast (WCAG AA passes).

Color values

HEX	#1B5C83
RGB	rgb(27, 92, 131)
HSL	hsl(203, 66%, 31%)
HSV	hsv(203, 79%, 51%)
CMYK	cmyk(79.4%, 29.8%, 0%, 48.6%)
CIE-LAB	lab(36.98, -5.86, -27.54)
CIE-LCH	lch(36.98, 28.16, 257.99°)
OKLab	oklab(45.37% -0.045 -0.0779)
OKLCH	oklch(45.37% 0.09 240)
XYZ	xyz(8.3743, 9.5250, 22.8655)
Luminance	0.0953 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B5C83 #83421B

analogous

#1B8376 #1B5C83 #1B2883

triadic

#1B5C83 #831B5C #5C831B

tetradic

#1B5C83 #761B83 #83421B #28831B

square

#1B5C83 #761B83 #83421B #28831B

split-complementary

#1B5C83 #831B28 #83761B

monochromatic

#06151E #113850 #1B5C83 #2580B6 #419FD8

Accessibility & contrast

On white

7.23

#1B5C83 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.91

#1B5C83 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B5C83

7.23:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B5C83	#FFFFFF	#000000	##FFFFFF
##1B5C83	1.00	7.23	2.91	7.23
#FFFFFF	7.23	1.00	21.00	1.00
#000000	2.91	21.00	1.00	21.00
##FFFFFF	7.23	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4A5C85

Deuteranopia (green-blind)

#3B5382

Tritanopia (blue-blind)

#00666A

Achromatopsia (no color)

#575757

Design tokens & code

CSS

--color: #1b5c83;
/* rgb */ color: rgb(27, 92, 131);
/* oklch */ color: oklch(45.4% 0.090 240.0);

Tailwind

colors: {
  custom: {
    50: '#688aa7',
    500: '#1b5c83',
    950: '#000000',
  },
}

SCSS

$custom: #1b5c83;
$custom-light: #688aa7;
$custom-dark: #000000;

JSON

{
  "hex": "#1b5c83",
  "rgb": {
    "r": 27,
    "g": 92,
    "b": 131
  },
  "hsl": {
    "h": 202.5,
    "s": 65.823,
    "l": 30.98
  },
  "oklch": {
    "l": 0.45373,
    "c": 0.08999,
    "h": 240
  },
  "luminance": 0.09526
}

Semantic roles & 50–950 ramp

primary

#1B5C83

secondary

#B66F43

accent

#7F3FE9

background

#F6F8FA

surface

#ECF0F4

border

#C7CBCE

text

#070B0F

muted

#7A7C7F

Preview Lab

Preview with #1B5C83

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

Preview Lab → · Contrast checker → · Palette generator →