#28404B#28404B

#28404B is a dark, muted cyan. Relative luminance 0.046; OKLCH L 35.7% C 0.035 H 228.5°. Best body text is #FFFFFF at 10.91:1 contrast (WCAG AA passes).

Color values

HEX	#28404B
RGB	rgb(40, 64, 75)
HSL	hsl(199, 30%, 23%)
HSV	hsv(199, 47%, 29%)
CMYK	cmyk(46.7%, 14.7%, 0%, 70.6%)
CIE-LAB	lab(25.64, -5.89, -9.60)
CIE-LCH	lch(25.64, 11.26, 238.48°)
OKLab	oklab(35.66% -0.0234 -0.0265)
OKLCH	oklch(35.66% 0.035 228.5)
XYZ	xyz(3.9780, 4.6256, 7.3385)
Luminance	0.0463 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#28404B #4B3328

analogous

#284B44 #28404B #282E4B

triadic

#28404B #4B2840 #404B28

tetradic

#28404B #44284B #4B3328 #2E4B28

square

#28404B #44284B #4B3328 #2E4B28

split-complementary

#28404B #4B282E #4B4428

monochromatic

#0B1114 #131E23 #28404B #3D6273 #53849B

Accessibility & contrast

On white

10.91

#28404B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.93

#28404B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #28404B

10.91:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##28404B	#FFFFFF	#000000	##FFFFFF
##28404B	1.00	10.91	1.93	10.91
#FFFFFF	10.91	1.00	21.00	1.00
#000000	1.93	21.00	1.00	21.00
##FFFFFF	10.91	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3A3F4C

Deuteranopia (green-blind)

#353B4B

Tritanopia (blue-blind)

#1A4343

Achromatopsia (no color)

#3D3D3D

Design tokens & code

CSS

--color: #28404b;
/* rgb */ color: rgb(40, 64, 75);
/* oklch */ color: oklch(35.7% 0.035 228.5);

Tailwind

colors: {
  custom: {
    50: '#64747d',
    500: '#28404b',
    950: '#000000',
  },
}

SCSS

$custom: #28404b;
$custom-light: #64747d;
$custom-dark: #000000;

JSON

{
  "hex": "#28404b",
  "rgb": {
    "r": 40,
    "g": 64,
    "b": 75
  },
  "hsl": {
    "h": 198.857,
    "s": 30.435,
    "l": 22.549
  },
  "oklch": {
    "l": 0.3566,
    "c": 0.03534,
    "h": 228.5
  },
  "luminance": 0.04626
}

Semantic roles & 50–950 ramp

primary

#28404B

secondary

#7D5F51

accent

#8161C7

background

#F6F7F7

surface

#EBEDEE

border

#C6C8C9

text

#050809

muted

#7A7B7B

Preview Lab

Preview with #28404B

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

Preview Lab → · Contrast checker → · Palette generator →