#1B588F#1B588F

#1B588F is a mid, moderate cyan. Relative luminance 0.092; OKLCH L 45.1% C 0.109 H 249.9°. Best body text is #FFFFFF at 7.40:1 contrast (WCAG AA passes).

Color values

HEX	#1B588F
RGB	rgb(27, 88, 143)
HSL	hsl(208, 68%, 33%)
HSV	hsv(208, 81%, 56%)
CMYK	cmyk(81.1%, 38.5%, 0%, 43.9%)
CIE-LAB	lab(36.36, 1.36, -35.82)
CIE-LCH	lch(36.36, 35.85, 272.17°)
OKLab	oklab(45.1% -0.0375 -0.1022)
OKLCH	oklch(45.1% 0.109 249.9)
XYZ	xyz(8.8978, 9.1946, 27.2871)
Luminance	0.0920 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B588F #8F521B

analogous

#1B8F8C #1B588F #1B1E8F

triadic

#1B588F #8F1B58 #588F1B

tetradic

#1B588F #8C1B8F #8F521B #1E8F1B

square

#1B588F #8C1B8F #8F521B #1E8F1B

split-complementary

#1B588F #8F1B1E #8F8C1B

monochromatic

#081928 #11385C #1B588F #2578C2 #4896DC

Accessibility & contrast

On white

7.40

#1B588F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.84

#1B588F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B588F

7.40:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B588F	#FFFFFF	#000000	##FFFFFF
##1B588F	1.00	7.40	2.84	7.40
#FFFFFF	7.40	1.00	21.00	1.00
#000000	2.84	21.00	1.00	21.00
##FFFFFF	7.40	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3E5B91

Deuteranopia (green-blind)

#2C518E

Tritanopia (blue-blind)

#00656C

Achromatopsia (no color)

#565656

Design tokens & code

CSS

--color: #1b588f;
/* rgb */ color: rgb(27, 88, 143);
/* oklch */ color: oklch(45.1% 0.109 249.9);

Tailwind

colors: {
  custom: {
    50: '#6b86b0',
    500: '#1b588f',
    950: '#000000',
  },
}

SCSS

$custom: #1b588f;
$custom-light: #6b86b0;
$custom-dark: #000000;

JSON

{
  "hex": "#1b588f",
  "rgb": {
    "r": 27,
    "g": 88,
    "b": 143
  },
  "hsl": {
    "h": 208.448,
    "s": 68.235,
    "l": 33.333
  },
  "oklch": {
    "l": 0.45096,
    "c": 0.10882,
    "h": 249.9
  },
  "luminance": 0.09196
}

Semantic roles & 50–950 ramp

primary

#1B588F

secondary

#BE8048

accent

#8F3DEB

background

#F6F8FA

surface

#ECEFF5

border

#C7CACF

text

#080B10

muted

#7A7C7F

Preview Lab

Preview with #1B588F

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

Preview Lab → · Contrast checker → · Palette generator →