#257D99#257D99

#257D99 is a mid, moderate cyan. Relative luminance 0.174; OKLCH L 55.1% C 0.091 H 223.8°. Best body text is #FFFFFF at 4.70:1 contrast (WCAG AA passes).

Color values

HEX	#257D99
RGB	rgb(37, 125, 153)
HSL	hsl(194, 61%, 37%)
HSV	hsv(194, 76%, 60%)
CMYK	cmyk(75.8%, 18.3%, 0%, 40%)
CIE-LAB	lab(48.71, -15.84, -22.44)
CIE-LCH	lch(48.71, 27.47, 234.77°)
OKLab	oklab(55.13% -0.0656 -0.0628)
OKLCH	oklch(55.13% 0.091 223.8)
XYZ	xyz(13.8440, 17.3588, 32.7518)
Luminance	0.1736 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#257D99 #994125

analogous

#25997B #257D99 #254399

triadic

#257D99 #99257D #7D9925

tetradic

#257D99 #7B2599 #994125 #439925

square

#257D99 #7B2599 #994125 #439925

split-complementary

#257D99 #992543 #997B25

monochromatic

#0D2C36 #195568 #257D99 #31A5CA #60BBD9

Accessibility & contrast

On white

4.70

#257D99 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.47

#257D99 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #257D99

4.70:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##257D99	#FFFFFF	#000000	##FFFFFF
##257D99	1.00	4.70	4.47	4.70
#FFFFFF	4.70	1.00	21.00	1.00
#000000	4.47	21.00	1.00	21.00
##FFFFFF	4.70	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#6D7A9A

Deuteranopia (green-blind)

#5D6F99

Tritanopia (blue-blind)

#008586

Achromatopsia (no color)

#747474

Design tokens & code

CSS

--color: #257d99;
/* rgb */ color: rgb(37, 125, 153);
/* oklch */ color: oklch(55.1% 0.091 223.8);

Tailwind

colors: {
  custom: {
    50: '#71a2b7',
    500: '#257d99',
    950: '#000000',
  },
}

SCSS

$custom: #257d99;
$custom-light: #71a2b7;
$custom-dark: #000000;

JSON

{
  "hex": "#257d99",
  "rgb": {
    "r": 37,
    "g": 125,
    "b": 153
  },
  "hsl": {
    "h": 194.483,
    "s": 61.053,
    "l": 37.255
  },
  "oklch": {
    "l": 0.5513,
    "c": 0.09086,
    "h": 223.8
  },
  "luminance": 0.1736
}

Semantic roles & 50–950 ramp

primary

#257D99

secondary

#BE745C

accent

#6A44E4

background

#F7FAFB

surface

#EDF3F6

border

#C8CDD0

text

#090F11

muted

#7B7F80

Preview Lab

Preview with #257D99

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

Preview Lab → · Contrast checker → · Palette generator →