#257DA1#257DA1

#257DA1 is a mid, moderate cyan. Relative luminance 0.176; OKLCH L 55.5% C 0.097 H 230.1°. Best body text is #FFFFFF at 4.64:1 contrast (WCAG AA passes).

Color values

HEX	#257DA1
RGB	rgb(37, 125, 161)
HSL	hsl(197, 63%, 39%)
HSV	hsv(197, 77%, 63%)
CMYK	cmyk(77%, 22.4%, 0%, 36.9%)
CIE-LAB	lab(49.05, -13.04, -26.59)
CIE-LCH	lch(49.05, 29.62, 243.87°)
OKLab	oklab(55.51% -0.0625 -0.0748)
OKLCH	oklch(55.51% 0.097 230.1)
XYZ	xyz(14.5270, 17.6320, 36.3490)
Luminance	0.1763 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#257DA1 #A14925

analogous

#25A187 #257DA1 #253FA1

triadic

#257DA1 #A1257D #7DA125

tetradic

#257DA1 #8725A1 #A14925 #3FA125

square

#257DA1 #8725A1 #A14925 #3FA125

split-complementary

#257DA1 #A1253F #A18725

monochromatic

#0E303D #1A566F #257DA1 #33A3D0 #65B9DC

Accessibility & contrast

On white

4.64

#257DA1 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.53

#257DA1 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#FFFFFF on #257DA1

4.64:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##257DA1	#FFFFFF	#000000	##FFFFFF
##257DA1	1.00	4.64	4.53	4.64
#FFFFFF	4.64	1.00	21.00	1.00
#000000	4.53	21.00	1.00	21.00
##FFFFFF	4.64	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#6B7BA3

Deuteranopia (green-blind)

#5A6FA0

Tritanopia (blue-blind)

#008789

Achromatopsia (no color)

#757575

Design tokens & code

CSS

--color: #257da1;
/* rgb */ color: rgb(37, 125, 161);
/* oklch */ color: oklch(55.5% 0.097 230.1);

Tailwind

colors: {
  custom: {
    50: '#73a2bd',
    500: '#257da1',
    950: '#000000',
  },
}

SCSS

$custom: #257da1;
$custom-light: #73a2bd;
$custom-dark: #000000;

JSON

{
  "hex": "#257da1",
  "rgb": {
    "r": 37,
    "g": 125,
    "b": 161
  },
  "hsl": {
    "h": 197.419,
    "s": 62.626,
    "l": 38.824
  },
  "oklch": {
    "l": 0.55512,
    "c": 0.09747,
    "h": 230.1
  },
  "luminance": 0.17634
}

Semantic roles & 50–950 ramp

primary

#257DA1

secondary

#C17D61

accent

#7242E6

background

#F7FAFB

surface

#EDF3F6

border

#C8CDD0

text

#090F12

muted

#7B7F81

Preview Lab

Preview with #257DA1

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

Preview Lab → · Contrast checker → · Palette generator →