#257D8F#257D8F

#257D8F is a mid, moderate cyan. Relative luminance 0.170; OKLCH L 54.7% C 0.085 H 214.5°. Best body text is #FFFFFF at 4.76:1 contrast (WCAG AA passes).

Color values

HEX	#257D8F
RGB	rgb(37, 125, 143)
HSL	hsl(190, 59%, 35%)
HSV	hsv(190, 74%, 56%)
CMYK	cmyk(74.1%, 12.6%, 0%, 43.9%)
CIE-LAB	lab(48.31, -19.25, -17.17)
CIE-LCH	lch(48.31, 25.80, 221.74°)
OKLab	oklab(54.68% -0.0697 -0.0479)
OKLCH	oklch(54.68% 0.085 214.5)
XYZ	xyz(13.0524, 17.0422, 28.5828)
Luminance	0.1704 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#257D8F #8F3725

analogous

#258F6C #257D8F #25488F

triadic

#257D8F #8F257D #7D8F25

tetradic

#257D8F #6C258F #8F3725 #488F25

square

#257D8F #6C258F #8F3725 #488F25

split-complementary

#257D8F #8F2548 #8F6C25

monochromatic

#0C282E #18525E #257D8F #32A7C0 #5AC0D4

Accessibility & contrast

On white

4.76

#257D8F on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.41

#257D8F on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #257D8F

4.76:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##257D8F	#FFFFFF	#000000	##FFFFFF
##257D8F	1.00	4.76	4.41	4.76
#FFFFFF	4.76	1.00	21.00	1.00
#000000	4.41	21.00	1.00	21.00
##FFFFFF	4.76	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#707990

Deuteranopia (green-blind)

#616E8F

Tritanopia (blue-blind)

#008483

Achromatopsia (no color)

#737373

Design tokens & code

CSS

--color: #257d8f;
/* rgb */ color: rgb(37, 125, 143);
/* oklch */ color: oklch(54.7% 0.085 214.5);

Tailwind

colors: {
  custom: {
    50: '#70a3af',
    500: '#257d8f',
    950: '#000000',
  },
}

SCSS

$custom: #257d8f;
$custom-light: #70a3af;
$custom-dark: #000000;

JSON

{
  "hex": "#257d8f",
  "rgb": {
    "r": 37,
    "g": 125,
    "b": 143
  },
  "hsl": {
    "h": 190.189,
    "s": 58.889,
    "l": 35.294
  },
  "oklch": {
    "l": 0.54681,
    "c": 0.08457,
    "h": 214.5
  },
  "luminance": 0.17044
}

Semantic roles & 50–950 ramp

primary

#257D8F

secondary

#B96757

accent

#6046E2

background

#F7FAFA

surface

#EDF3F4

border

#C8CDCE

text

#090F10

muted

#7B7F7F

Preview Lab

Preview with #257D8F

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

Preview Lab → · Contrast checker → · Palette generator →