#638BB5#638BB5

#638BB5 is a light, moderate cyan. Relative luminance 0.245; OKLCH L 62.4% C 0.078 H 250.3°. Best body text is #000000 at 5.89:1 contrast (WCAG AA passes).

Color values

HEX	#638BB5
RGB	rgb(99, 139, 181)
HSL	hsl(211, 36%, 55%)
HSV	hsv(211, 45%, 71%)
CMYK	cmyk(45.3%, 23.2%, 0%, 29%)
CIE-LAB	lab(56.54, -2.37, -26.33)
CIE-LCH	lch(56.54, 26.44, 264.85°)
OKLab	oklab(62.4% -0.0262 -0.0733)
OKLCH	oklch(62.4% 0.078 250.3)
XYZ	xyz(22.7159, 24.4526, 47.2299)
Luminance	0.2445 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#638BB5 #B58D63

analogous

#63B4B5 #638BB5 #6463B5

triadic

#638BB5 #B5638B #8BB563

tetradic

#638BB5 #B563B4 #B58D63 #63B564

square

#638BB5 #B563B4 #B58D63 #63B564

split-complementary

#638BB5 #B56463 #B4B563

monochromatic

#334E6B #466C94 #638BB5 #8DAAC9 #B6C9DC

Accessibility & contrast

On white

3.56

#638BB5 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.89

#638BB5 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #638BB5

5.89:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##638BB5	#FFFFFF	#000000	##000000
##638BB5	1.00	3.56	5.89	5.89
#FFFFFF	3.56	1.00	21.00	21.00
#000000	5.89	21.00	1.00	1.00
##000000	5.89	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#7A8CB7

Deuteranopia (green-blind)

#7084B4

Tritanopia (blue-blind)

#429599

Achromatopsia (no color)

#888888

Design tokens & code

CSS

--color: #638bb5;
/* rgb */ color: rgb(99, 139, 181);
/* oklch */ color: oklch(62.4% 0.078 250.3);

Tailwind

colors: {
  custom: {
    50: '#93accb',
    500: '#638bb5',
    950: '#000000',
  },
}

SCSS

$custom: #638bb5;
$custom-light: #93accb;
$custom-dark: #000000;

JSON

{
  "hex": "#638bb5",
  "rgb": {
    "r": 99,
    "g": 139,
    "b": 181
  },
  "hsl": {
    "h": 210.732,
    "s": 35.652,
    "l": 54.902
  },
  "oklch": {
    "l": 0.62403,
    "c": 0.07783,
    "h": 250.3
  },
  "luminance": 0.24454
}

Semantic roles & 50–950 ramp

primary

#638BB5

secondary

#CBBAA9

accent

#955CCC

background

#F9FAFC

surface

#F2F4F8

border

#CCCED1

text

#0D1013

muted

#7E7F82

Preview Lab

Preview with #638BB5

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

Preview Lab → · Contrast checker → · Palette generator →