#187DB4#187DB4

#187DB4 is a mid, vivid cyan. Relative luminance 0.182; OKLCH L 56.2% C 0.120 H 239.7°. Best body text is #000000 at 4.63:1 contrast (WCAG AA passes).

Color values

HEX	#187DB4
RGB	rgb(24, 125, 180)
HSL	hsl(201, 76%, 40%)
HSV	hsv(201, 87%, 71%)
CMYK	cmyk(86.7%, 30.6%, 0%, 29.4%)
CIE-LAB	lab(49.68, -7.36, -36.64)
CIE-LCH	lch(49.68, 37.38, 258.65°)
OKLab	oklab(56.24% -0.0609 -0.104)
OKLCH	oklch(56.24% 0.12 239.7)
XYZ	xyz(15.9452, 18.1547, 45.8350)
Luminance	0.1816 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#187DB4 #B44F18

analogous

#18B49D #187DB4 #182FB4

triadic

#187DB4 #B4187D #7DB418

tetradic

#187DB4 #9D18B4 #B44F18 #2FB418

square

#187DB4 #9D18B4 #B44F18 #2FB418

split-complementary

#187DB4 #B4182F #B49D18

monochromatic

#0A3248 #11577E #187DB4 #27A0E2 #5DB8E9

Accessibility & contrast

On white

4.53

#187DB4 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.63

#187DB4 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #187DB4

4.63:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##187DB4	#FFFFFF	#000000	##000000
##187DB4	1.00	4.53	4.63	4.63
#FFFFFF	4.53	1.00	21.00	21.00
#000000	4.63	21.00	1.00	1.00
##000000	4.63	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#637EB6

Deuteranopia (green-blind)

#4E70B3

Tritanopia (blue-blind)

#008B90

Achromatopsia (no color)

#767676

Design tokens & code

CSS

--color: #187db4;
/* rgb */ color: rgb(24, 125, 180);
/* oklch */ color: oklch(56.2% 0.120 239.7);

Tailwind

colors: {
  custom: {
    50: '#73a2ca',
    500: '#187db4',
    950: '#000000',
  },
}

SCSS

$custom: #187db4;
$custom-light: #73a2ca;
$custom-dark: #000000;

JSON

{
  "hex": "#187db4",
  "rgb": {
    "r": 24,
    "g": 125,
    "b": 180
  },
  "hsl": {
    "h": 201.154,
    "s": 76.471,
    "l": 40
  },
  "oklch": {
    "l": 0.56238,
    "c": 0.12049,
    "h": 239.7
  },
  "luminance": 0.18157
}

Semantic roles & 50–950 ramp

primary

#187DB4

secondary

#CD835B

accent

#7835F3

background

#F7F9FC

surface

#EEF2F8

border

#C9CCD1

text

#0A0F13

muted

#7C7E82

Preview Lab

Preview with #187DB4

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

Preview Lab → · Contrast checker → · Palette generator →