#638FA3#638FA3

#638FA3 is a light, muted cyan. Relative luminance 0.249; OKLCH L 62.6% C 0.057 H 228.0°. Best body text is #000000 at 5.99:1 contrast (WCAG AA passes).

Color values

HEX	#638FA3
RGB	rgb(99, 143, 163)
HSL	hsl(199, 26%, 51%)
HSV	hsv(199, 39%, 64%)
CMYK	cmyk(39.3%, 12.3%, 0%, 36.1%)
CIE-LAB	lab(57.02, -9.72, -15.31)
CIE-LCH	lch(57.02, 18.14, 237.60°)
OKLab	oklab(62.56% -0.0379 -0.0421)
OKLCH	oklch(62.56% 0.057 228)
XYZ	xyz(21.5767, 24.9406, 38.3203)
Luminance	0.2494 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#638FA3 #A37763

analogous

#63A397 #638FA3 #636FA3

triadic

#638FA3 #A3638F #8FA363

tetradic

#638FA3 #9763A3 #A37763 #6FA363

square

#638FA3 #9763A3 #A37763 #6FA363

split-complementary

#638FA3 #A3636F #A39763

monochromatic

#344D58 #4A6E7E #638FA3 #89ABBA #B0C6D0

Accessibility & contrast

On white

3.51

#638FA3 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.99

#638FA3 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #638FA3

5.99:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##638FA3	#FFFFFF	#000000	##000000
##638FA3	1.00	3.51	5.99	5.99
#FFFFFF	3.51	1.00	21.00	21.00
#000000	5.99	21.00	1.00	1.00
##000000	5.99	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#858DA4

Deuteranopia (green-blind)

#7B86A3

Tritanopia (blue-blind)

#4B9595

Achromatopsia (no color)

#898989

Design tokens & code

CSS

--color: #638fa3;
/* rgb */ color: rgb(99, 143, 163);
/* oklch */ color: oklch(62.6% 0.057 228.0);

Tailwind

colors: {
  custom: {
    50: '#92afbe',
    500: '#638fa3',
    950: '#000000',
  },
}

SCSS

$custom: #638fa3;
$custom-light: #92afbe;
$custom-dark: #000000;

JSON

{
  "hex": "#638fa3",
  "rgb": {
    "r": 99,
    "g": 143,
    "b": 163
  },
  "hsl": {
    "h": 198.75,
    "s": 25.806,
    "l": 51.373
  },
  "oklch": {
    "l": 0.62557,
    "c": 0.05665,
    "h": 228
  },
  "luminance": 0.24942
}

Semantic roles & 50–950 ramp

primary

#638FA3

secondary

#BFACA3

accent

#8366C2

background

#F9FAFB

surface

#F1F4F6

border

#CBCED0

text

#0D1012

muted

#7E7F81

Preview Lab

Preview with #638FA3

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

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