#28638B#28638B

#28638B is a mid, moderate cyan. Relative luminance 0.112; OKLCH L 48.0% C 0.089 H 241.7°. Best body text is #FFFFFF at 6.47:1 contrast (WCAG AA passes).

Color values

HEX	#28638B
RGB	rgb(40, 99, 139)
HSL	hsl(204, 55%, 35%)
HSV	hsv(204, 71%, 55%)
CMYK	cmyk(71.2%, 28.8%, 0%, 45.5%)
CIE-LAB	lab(39.98, -5.28, -27.67)
CIE-LCH	lch(39.98, 28.17, 259.20°)
OKLab	oklab(47.99% -0.042 -0.0781)
OKLCH	oklch(47.99% 0.089 241.7)
XYZ	xyz(9.9953, 11.2378, 26.0634)
Luminance	0.1124 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#28638B #8B5028

analogous

#288B81 #28638B #28328B

triadic

#28638B #8B2863 #638B28

tetradic

#28638B #81288B #8B5028 #328B28

square

#28638B #81288B #8B5028 #328B28

split-complementary

#28638B #8B2832 #8B8128

monochromatic

#0D1F2C #1A415B #28638B #3685BB #5DA2D0

Accessibility & contrast

On white

6.47

#28638B on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.25

#28638B on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #28638B

6.47:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##28638B	#FFFFFF	#000000	##FFFFFF
##28638B	1.00	6.47	3.25	6.47
#FFFFFF	6.47	1.00	21.00	1.00
#000000	3.25	21.00	1.00	21.00
##FFFFFF	6.47	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#51648D

Deuteranopia (green-blind)

#435A8A

Tritanopia (blue-blind)

#006D71

Achromatopsia (no color)

#5E5E5E

Design tokens & code

CSS

--color: #28638b;
/* rgb */ color: rgb(40, 99, 139);
/* oklch */ color: oklch(48.0% 0.089 241.7);

Tailwind

colors: {
  custom: {
    50: '#6f8fad',
    500: '#28638b',
    950: '#000000',
  },
}

SCSS

$custom: #28638b;
$custom-light: #6f8fad;
$custom-dark: #000000;

JSON

{
  "hex": "#28638b",
  "rgb": {
    "r": 40,
    "g": 99,
    "b": 139
  },
  "hsl": {
    "h": 204.242,
    "s": 55.307,
    "l": 35.098
  },
  "oklch": {
    "l": 0.47989,
    "c": 0.08866,
    "h": 241.7
  },
  "luminance": 0.11239
}

Semantic roles & 50–950 ramp

primary

#28638B

secondary

#B67F59

accent

#8649DF

background

#F7F8FA

surface

#EDF0F4

border

#C8CBCE

text

#080C10

muted

#7B7D7F

Preview Lab

Preview with #28638B

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

Preview Lab → · Contrast checker → · Palette generator →