#237CA4#237CA4

#237CA4 is a mid, moderate cyan. Relative luminance 0.175; OKLCH L 55.4% C 0.101 H 232.8°. Best body text is #FFFFFF at 4.68:1 contrast (WCAG AA passes).

Color values

HEX	#237CA4
RGB	rgb(35, 124, 164)
HSL	hsl(199, 65%, 39%)
HSV	hsv(199, 79%, 64%)
CMYK	cmyk(78.7%, 24.4%, 0%, 35.7%)
CIE-LAB	lab(48.82, -11.64, -28.69)
CIE-LCH	lch(48.82, 30.96, 247.92°)
OKLab	oklab(55.36% -0.0613 -0.0808)
OKLCH	oklch(55.36% 0.101 232.8)
XYZ	xyz(14.5989, 17.4512, 37.7138)
Luminance	0.1745 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#237CA4 #A44B23

analogous

#23A48C #237CA4 #233BA4

triadic

#237CA4 #A4237C #7CA423

tetradic

#237CA4 #8C23A4 #A44B23 #3BA423

square

#237CA4 #8C23A4 #A44B23 #3BA423

split-complementary

#237CA4 #A4233B #A48C23

monochromatic

#0D303F #185672 #237CA4 #31A1D3 #64B8DE

Accessibility & contrast

On white

4.68

#237CA4 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.49

#237CA4 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #237CA4

4.68:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##237CA4	#FFFFFF	#000000	##FFFFFF
##237CA4	1.00	4.68	4.49	4.68
#FFFFFF	4.68	1.00	21.00	1.00
#000000	4.49	21.00	1.00	21.00
##FFFFFF	4.68	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#687BA6

Deuteranopia (green-blind)

#576FA3

Tritanopia (blue-blind)

#00878A

Achromatopsia (no color)

#747474

Design tokens & code

CSS

--color: #237ca4;
/* rgb */ color: rgb(35, 124, 164);
/* oklch */ color: oklch(55.4% 0.101 232.8);

Tailwind

colors: {
  custom: {
    50: '#73a1bf',
    500: '#237ca4',
    950: '#000000',
  },
}

SCSS

$custom: #237ca4;
$custom-light: #73a1bf;
$custom-dark: #000000;

JSON

{
  "hex": "#237ca4",
  "rgb": {
    "r": 35,
    "g": 124,
    "b": 164
  },
  "hsl": {
    "h": 198.605,
    "s": 64.824,
    "l": 39.02
  },
  "oklch": {
    "l": 0.55364,
    "c": 0.10148,
    "h": 232.8
  },
  "luminance": 0.17453
}

Semantic roles & 50–950 ramp

primary

#237CA4

secondary

#C37F60

accent

#7440E8

background

#F7F9FB

surface

#EDF2F7

border

#C8CCD0

text

#090F12

muted

#7B7E81

Preview Lab

Preview with #237CA4

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

Preview Lab → · Contrast checker → · Palette generator →