#1B5983#1B5983

#1B5983 is a dark, moderate cyan. Relative luminance 0.090; OKLCH L 44.6% C 0.092 H 243.0°. Best body text is #FFFFFF at 7.49:1 contrast (WCAG AA passes).

Color values

HEX	#1B5983
RGB	rgb(27, 89, 131)
HSL	hsl(204, 66%, 31%)
HSV	hsv(204, 79%, 51%)
CMYK	cmyk(79.4%, 32.1%, 0%, 48.6%)
CIE-LAB	lab(36.01, -3.99, -29.05)
CIE-LCH	lch(36.01, 29.32, 262.18°)
OKLab	oklab(44.61% -0.042 -0.0824)
OKLCH	oklch(44.61% 0.092 243)
XYZ	xyz(8.1195, 9.0155, 22.7806)
Luminance	0.0902 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B5983 #83451B

analogous

#1B8379 #1B5983 #1B2583

triadic

#1B5983 #831B59 #59831B

tetradic

#1B5983 #791B83 #83451B #25831B

square

#1B5983 #791B83 #83451B #25831B

split-complementary

#1B5983 #831B25 #83791B

monochromatic

#06141E #113750 #1B5983 #257BB6 #419BD8

Accessibility & contrast

On white

7.49

#1B5983 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.80

#1B5983 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B5983

7.49:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B5983	#FFFFFF	#000000	##FFFFFF
##1B5983	1.00	7.49	2.80	7.49
#FFFFFF	7.49	1.00	21.00	1.00
#000000	2.80	21.00	1.00	21.00
##FFFFFF	7.49	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#455A85

Deuteranopia (green-blind)

#375082

Tritanopia (blue-blind)

#006368

Achromatopsia (no color)

#555555

Design tokens & code

CSS

--color: #1b5983;
/* rgb */ color: rgb(27, 89, 131);
/* oklch */ color: oklch(44.6% 0.092 243.0);

Tailwind

colors: {
  custom: {
    50: '#6887a7',
    500: '#1b5983',
    950: '#000000',
  },
}

SCSS

$custom: #1b5983;
$custom-light: #6887a7;
$custom-dark: #000000;

JSON

{
  "hex": "#1b5983",
  "rgb": {
    "r": 27,
    "g": 89,
    "b": 131
  },
  "hsl": {
    "h": 204.231,
    "s": 65.823,
    "l": 30.98
  },
  "oklch": {
    "l": 0.44611,
    "c": 0.09246,
    "h": 243
  },
  "luminance": 0.09016
}

Semantic roles & 50–950 ramp

primary

#1B5983

secondary

#B67243

accent

#843FE9

background

#F6F8FA

surface

#EBEFF4

border

#C6CACE

text

#070B0F

muted

#7A7C7F

Preview Lab

Preview with #1B5983

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

Preview Lab → · Contrast checker → · Palette generator →