#237DA3#237DA3

#237DA3 is a mid, moderate cyan. Relative luminance 0.177; OKLCH L 55.6% C 0.100 H 231.2°. Best body text is #FFFFFF at 4.63:1 contrast (WCAG AA passes).

Color values

HEX	#237DA3
RGB	rgb(35, 125, 163)
HSL	hsl(198, 65%, 39%)
HSV	hsv(198, 79%, 64%)
CMYK	cmyk(78.5%, 23.3%, 0%, 36.1%)
CIE-LAB	lab(49.09, -12.57, -27.70)
CIE-LCH	lch(49.09, 30.41, 245.59°)
OKLab	oklab(55.56% -0.0627 -0.0779)
OKLCH	oklch(55.56% 0.1 231.2)
XYZ	xyz(14.6349, 17.6671, 37.2820)
Luminance	0.1767 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#237DA3 #A34923

analogous

#23A389 #237DA3 #233DA3

triadic

#237DA3 #A3237D #7DA323

tetradic

#237DA3 #8923A3 #A34923 #3DA323

square

#237DA3 #8923A3 #A34923 #3DA323

split-complementary

#237DA3 #A3233D #A38923

monochromatic

#0D303E #185671 #237DA3 #31A3D3 #63B9DD

Accessibility & contrast

On white

4.63

#237DA3 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.53

#237DA3 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#FFFFFF on #237DA3

4.63:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##237DA3	#FFFFFF	#000000	##FFFFFF
##237DA3	1.00	4.63	4.53	4.63
#FFFFFF	4.63	1.00	21.00	1.00
#000000	4.53	21.00	1.00	21.00
##FFFFFF	4.63	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#6A7BA5

Deuteranopia (green-blind)

#596FA2

Tritanopia (blue-blind)

#00878A

Achromatopsia (no color)

#757575

Design tokens & code

CSS

--color: #237da3;
/* rgb */ color: rgb(35, 125, 163);
/* oklch */ color: oklch(55.6% 0.100 231.2);

Tailwind

colors: {
  custom: {
    50: '#72a2be',
    500: '#237da3',
    950: '#000000',
  },
}

SCSS

$custom: #237da3;
$custom-light: #72a2be;
$custom-dark: #000000;

JSON

{
  "hex": "#237da3",
  "rgb": {
    "r": 35,
    "g": 125,
    "b": 163
  },
  "hsl": {
    "h": 197.813,
    "s": 64.646,
    "l": 38.824
  },
  "oklch": {
    "l": 0.55562,
    "c": 0.10003,
    "h": 231.2
  },
  "luminance": 0.17669
}

Semantic roles & 50–950 ramp

primary

#237DA3

secondary

#C37D5F

accent

#7240E8

background

#F7FAFB

surface

#EDF3F6

border

#C8CDD0

text

#090F12

muted

#7B7F81

Preview Lab

Preview with #237DA3

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

Preview Lab → · Contrast checker → · Palette generator →