#257D8B#257D8B

#257D8B is a mid, moderate teal. Relative luminance 0.169; OKLCH L 54.5% C 0.083 H 210.4°. Best body text is #FFFFFF at 4.79:1 contrast (WCAG AA passes).

Color values

HEX	#257D8B
RGB	rgb(37, 125, 139)
HSL	hsl(188, 58%, 35%)
HSV	hsv(188, 73%, 55%)
CMYK	cmyk(73.4%, 10.1%, 0%, 45.5%)
CIE-LAB	lab(48.16, -20.58, -15.05)
CIE-LCH	lch(48.16, 25.49, 216.18°)
OKLab	oklab(54.51% -0.0715 -0.0419)
OKLCH	oklch(54.51% 0.083 210.4)
XYZ	xyz(12.7548, 16.9231, 27.0154)
Luminance	0.1693 (WCAG relative)
Temperature	cool
Family	teal

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#257D8B #8B3325

analogous

#258B66 #257D8B #254A8B

triadic

#257D8B #8B257D #7D8B25

tetradic

#257D8B #66258B #8B3325 #4A8B25

square

#257D8B #66258B #8B3325 #4A8B25

split-complementary

#257D8B #8B254A #8B6625

monochromatic

#0B262A #18525B #257D8B #32A8BB #58C2D3

Accessibility & contrast

On white

4.79

#257D8B on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.39

#257D8B on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #257D8B

4.79:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##257D8B	#FFFFFF	#000000	##FFFFFF
##257D8B	1.00	4.79	4.39	4.79
#FFFFFF	4.79	1.00	21.00	1.00
#000000	4.39	21.00	1.00	21.00
##FFFFFF	4.79	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#71788C

Deuteranopia (green-blind)

#636E8B

Tritanopia (blue-blind)

#008381

Achromatopsia (no color)

#727272

Design tokens & code

CSS

--color: #257d8b;
/* rgb */ color: rgb(37, 125, 139);
/* oklch */ color: oklch(54.5% 0.083 210.4);

Tailwind

colors: {
  custom: {
    50: '#6fa3ac',
    500: '#257d8b',
    950: '#000000',
  },
}

SCSS

$custom: #257d8b;
$custom-light: #6fa3ac;
$custom-dark: #000000;

JSON

{
  "hex": "#257d8b",
  "rgb": {
    "r": 37,
    "g": 125,
    "b": 139
  },
  "hsl": {
    "h": 188.235,
    "s": 57.955,
    "l": 34.51
  },
  "oklch": {
    "l": 0.5451,
    "c": 0.08282,
    "h": 210.4
  },
  "luminance": 0.16925
}

Semantic roles & 50–950 ramp

primary

#257D8B

secondary

#B76255

accent

#5C47E1

background

#F7FAFA

surface

#EDF3F4

border

#C8CDCE

text

#080F10

muted

#7B7F7F

Preview Lab

Preview with #257D8B

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

Preview Lab → · Contrast checker → · Palette generator →