#257E9B#257E9B

#257E9B is a mid, moderate cyan. Relative luminance 0.177; OKLCH L 55.5% C 0.092 H 224.4°. Best body text is #FFFFFF at 4.63:1 contrast (WCAG AA passes).

Color values

HEX	#257E9B
RGB	rgb(37, 126, 155)
HSL	hsl(195, 61%, 38%)
HSV	hsv(195, 76%, 61%)
CMYK	cmyk(76.1%, 18.7%, 0%, 39.2%)
CIE-LAB	lab(49.11, -15.71, -23.00)
CIE-LCH	lch(49.11, 27.85, 235.67°)
OKLab	oklab(55.47% -0.0659 -0.0644)
OKLCH	oklch(55.47% 0.092 224.4)
XYZ	xyz(14.1378, 17.6799, 33.6714)
Luminance	0.1768 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#257E9B #9B4225

analogous

#259B7D #257E9B #25439B

triadic

#257E9B #9B257E #7E9B25

tetradic

#257E9B #7D259B #9B4225 #439B25

square

#257E9B #7D259B #9B4225 #439B25

split-complementary

#257E9B #9B2543 #9B7D25

monochromatic

#0D2E38 #19566A #257E9B #31A6CC #61BCD9

Accessibility & contrast

On white

4.63

#257E9B on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.54

#257E9B on #000000

AA ✓AA large ✓AAA ✗

Best text color

#FFFFFF on #257E9B

4.63:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##257E9B	#FFFFFF	#000000	##FFFFFF
##257E9B	1.00	4.63	4.54	4.63
#FFFFFF	4.63	1.00	21.00	1.00
#000000	4.54	21.00	1.00	21.00
##FFFFFF	4.63	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#6E7B9C

Deuteranopia (green-blind)

#5E709B

Tritanopia (blue-blind)

#008787

Achromatopsia (no color)

#757575

Design tokens & code

CSS

--color: #257e9b;
/* rgb */ color: rgb(37, 126, 155);
/* oklch */ color: oklch(55.5% 0.092 224.4);

Tailwind

colors: {
  custom: {
    50: '#72a3b8',
    500: '#257e9b',
    950: '#000000',
  },
}

SCSS

$custom: #257e9b;
$custom-light: #72a3b8;
$custom-dark: #000000;

JSON

{
  "hex": "#257e9b",
  "rgb": {
    "r": 37,
    "g": 126,
    "b": 155
  },
  "hsl": {
    "h": 194.746,
    "s": 61.458,
    "l": 37.647
  },
  "oklch": {
    "l": 0.55475,
    "c": 0.09213,
    "h": 224.4
  },
  "luminance": 0.17682
}

Semantic roles & 50–950 ramp

primary

#257E9B

secondary

#BF755D

accent

#6B43E5

background

#F7FAFB

surface

#EDF3F6

border

#C8CDD0

text

#090F11

muted

#7B7F80

Preview Lab

Preview with #257E9B

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

Preview Lab → · Contrast checker → · Palette generator →