#237D9B#237D9B

#237D9B is a mid, moderate cyan. Relative luminance 0.174; OKLCH L 55.2% C 0.093 H 225.1°. Best body text is #FFFFFF at 4.69:1 contrast (WCAG AA passes).

Color values

HEX	#237D9B
RGB	rgb(35, 125, 155)
HSL	hsl(195, 63%, 37%)
HSV	hsv(195, 77%, 61%)
CMYK	cmyk(77.4%, 19.4%, 0%, 39.2%)
CIE-LAB	lab(48.75, -15.40, -23.55)
CIE-LCH	lch(48.75, 28.14, 236.83°)
OKLab	oklab(55.18% -0.0657 -0.066)
OKLCH	oklch(55.18% 0.093 225.1)
XYZ	xyz(13.9407, 17.3894, 33.6258)
Luminance	0.1739 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#237D9B #9B4123

analogous

#239B7D #237D9B #23419B

triadic

#237D9B #9B237D #7D9B23

tetradic

#237D9B #7D239B #9B4123 #419B23

square

#237D9B #7D239B #9B4123 #419B23

split-complementary

#237D9B #9B2341 #9B7D23

monochromatic

#0C2C37 #185569 #237D9B #2EA5CD #5EBBDB

Accessibility & contrast

On white

4.69

#237D9B on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.48

#237D9B on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #237D9B

4.69:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##237D9B	#FFFFFF	#000000	##FFFFFF
##237D9B	1.00	4.69	4.48	4.69
#FFFFFF	4.69	1.00	21.00	1.00
#000000	4.48	21.00	1.00	21.00
##FFFFFF	4.69	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#6C7A9D

Deuteranopia (green-blind)

#5C6F9B

Tritanopia (blue-blind)

#008687

Achromatopsia (no color)

#747474

Design tokens & code

CSS

--color: #237d9b;
/* rgb */ color: rgb(35, 125, 155);
/* oklch */ color: oklch(55.2% 0.093 225.1);

Tailwind

colors: {
  custom: {
    50: '#71a2b8',
    500: '#237d9b',
    950: '#000000',
  },
}

SCSS

$custom: #237d9b;
$custom-light: #71a2b8;
$custom-dark: #000000;

JSON

{
  "hex": "#237d9b",
  "rgb": {
    "r": 35,
    "g": 125,
    "b": 155
  },
  "hsl": {
    "h": 195,
    "s": 63.158,
    "l": 37.255
  },
  "oklch": {
    "l": 0.55175,
    "c": 0.09318,
    "h": 225.1
  },
  "luminance": 0.17391
}

Semantic roles & 50–950 ramp

primary

#237D9B

secondary

#BF745A

accent

#6B42E6

background

#F7FAFB

surface

#EDF3F6

border

#C8CDD0

text

#090F11

muted

#7B7F80

Preview Lab

Preview with #237D9B

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

Preview Lab → · Contrast checker → · Palette generator →