#5B99CB#5B99CB

#5B99CB is a light, moderate cyan. Relative luminance 0.293; OKLCH L 66.2% C 0.099 H 244.4°. Best body text is #000000 at 6.86:1 contrast (WCAG AA passes).

Color values

HEX	#5B99CB
RGB	rgb(91, 153, 203)
HSL	hsl(207, 52%, 58%)
HSV	hsv(207, 55%, 80%)
CMYK	cmyk(55.2%, 24.6%, 0%, 20.4%)
CIE-LAB	lab(61.06, -5.59, -31.79)
CIE-LCH	lch(61.06, 32.28, 260.03°)
OKLab	oklab(66.16% -0.0426 -0.089)
OKLCH	oklch(66.16% 0.099 244.4)
XYZ	xyz(26.4812, 29.3162, 60.7514)
Luminance	0.2932 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#5B99CB #CB8D5B

analogous

#5BCBC5 #5B99CB #5B61CB

triadic

#5B99CB #CB5B99 #99CB5B

tetradic

#5B99CB #C55BCB #CB8D5B #61CB5B

square

#5B99CB #C55BCB #CB8D5B #61CB5B

split-complementary

#5B99CB #CB5B61 #CBC55B

monochromatic

#295B82 #387BB1 #5B99CB #89B6DA #B8D3E8

Accessibility & contrast

On white

3.06

#5B99CB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.86

#5B99CB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #5B99CB

6.86:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##5B99CB	#FFFFFF	#000000	##000000
##5B99CB	1.00	3.06	6.86	6.86
#FFFFFF	3.06	1.00	21.00	21.00
#000000	6.86	21.00	1.00	1.00
##000000	6.86	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#849ACD

Deuteranopia (green-blind)

#758ECA

Tritanopia (blue-blind)

#00A5AA

Achromatopsia (no color)

#939393

Design tokens & code

CSS

--color: #5b99cb;
/* rgb */ color: rgb(91, 153, 203);
/* oklch */ color: oklch(66.2% 0.099 244.4);

Tailwind

colors: {
  custom: {
    50: '#91b6db',
    500: '#5b99cb',
    950: '#000000',
  },
}

SCSS

$custom: #5b99cb;
$custom-light: #91b6db;
$custom-dark: #000000;

JSON

{
  "hex": "#5b99cb",
  "rgb": {
    "r": 91,
    "g": 153,
    "b": 203
  },
  "hsl": {
    "h": 206.786,
    "s": 51.852,
    "l": 57.647
  },
  "oklch": {
    "l": 0.66158,
    "c": 0.0987,
    "h": 244.4
  },
  "luminance": 0.29318
}

Semantic roles & 50–950 ramp

primary

#5B99CB

secondary

#D7BEAA

accent

#8C4CDB

background

#F9FBFD

surface

#F2F6FB

border

#CCD0D4

text

#0D1115

muted

#7E8083

Preview Lab

Preview with #5B99CB

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

Preview Lab → · Contrast checker → · Palette generator →