#257EA1#257EA1

#257EA1 is a mid, moderate cyan. Relative luminance 0.179; OKLCH L 55.8% C 0.097 H 229.1°. Best body text is #FFFFFF at 4.59:1 contrast (WCAG AA passes).

Color values

HEX	#257EA1
RGB	rgb(37, 126, 161)
HSL	hsl(197, 63%, 39%)
HSV	hsv(197, 77%, 63%)
CMYK	cmyk(77%, 21.7%, 0%, 36.9%)
CIE-LAB	lab(49.36, -13.61, -26.11)
CIE-LCH	lch(49.36, 29.44, 242.47°)
OKLab	oklab(55.76% -0.0635 -0.0734)
OKLCH	oklch(55.76% 0.097 229.1)
XYZ	xyz(14.6542, 17.8865, 36.3914)
Luminance	0.1789 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#257EA1 #A14825

analogous

#25A186 #257EA1 #2540A1

triadic

#257EA1 #A1257E #7EA125

tetradic

#257EA1 #8625A1 #A14825 #40A125

square

#257EA1 #8625A1 #A14825 #40A125

split-complementary

#257EA1 #A12540 #A18625

monochromatic

#0E303D #1A576F #257EA1 #33A4D0 #65BADC

Accessibility & contrast

On white

4.59

#257EA1 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.58

#257EA1 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#FFFFFF on #257EA1

4.59:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##257EA1	#FFFFFF	#000000	##FFFFFF
##257EA1	1.00	4.59	4.58	4.59
#FFFFFF	4.59	1.00	21.00	1.00
#000000	4.58	21.00	1.00	21.00
##FFFFFF	4.59	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#6C7CA3

Deuteranopia (green-blind)

#5B70A1

Tritanopia (blue-blind)

#00888A

Achromatopsia (no color)

#757575

Design tokens & code

CSS

--color: #257ea1;
/* rgb */ color: rgb(37, 126, 161);
/* oklch */ color: oklch(55.8% 0.097 229.1);

Tailwind

colors: {
  custom: {
    50: '#73a3bd',
    500: '#257ea1',
    950: '#000000',
  },
}

SCSS

$custom: #257ea1;
$custom-light: #73a3bd;
$custom-dark: #000000;

JSON

{
  "hex": "#257ea1",
  "rgb": {
    "r": 37,
    "g": 126,
    "b": 161
  },
  "hsl": {
    "h": 196.935,
    "s": 62.626,
    "l": 38.824
  },
  "oklch": {
    "l": 0.5576,
    "c": 0.09705,
    "h": 229.1
  },
  "luminance": 0.17888
}

Semantic roles & 50–950 ramp

primary

#257EA1

secondary

#C17C61

accent

#7042E6

background

#F7FAFB

surface

#EDF3F6

border

#C8CDD0

text

#090F12

muted

#7B7F81

Preview Lab

Preview with #257EA1

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

Preview Lab → · Contrast checker → · Palette generator →