#257E91#257E91

#257E91 is a mid, moderate cyan. Relative luminance 0.174; OKLCH L 55.0% C 0.086 H 215.3°. Best body text is #FFFFFF at 4.70:1 contrast (WCAG AA passes).

Color values

HEX	#257E91
RGB	rgb(37, 126, 145)
HSL	hsl(191, 59%, 36%)
HSV	hsv(191, 74%, 57%)
CMYK	cmyk(74.5%, 13.1%, 0%, 43.1%)
CIE-LAB	lab(48.71, -19.12, -17.75)
CIE-LCH	lch(48.71, 26.09, 222.87°)
OKLab	oklab(55.02% -0.0699 -0.0495)
OKLCH	oklch(55.02% 0.086 215.3)
XYZ	xyz(13.3325, 17.3578, 29.4303)
Luminance	0.1736 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#257E91 #913825

analogous

#25916E #257E91 #254891

triadic

#257E91 #91257E #7E9125

tetradic

#257E91 #6E2591 #913825 #489125

square

#257E91 #6E2591 #913825 #489125

split-complementary

#257E91 #912548 #916E25

monochromatic

#0C292F #195460 #257E91 #31A8C2 #5BC0D5

Accessibility & contrast

On white

4.70

#257E91 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.47

#257E91 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #257E91

4.70:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##257E91	#FFFFFF	#000000	##FFFFFF
##257E91	1.00	4.70	4.47	4.70
#FFFFFF	4.70	1.00	21.00	1.00
#000000	4.47	21.00	1.00	21.00
##FFFFFF	4.70	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#717A92

Deuteranopia (green-blind)

#626F91

Tritanopia (blue-blind)

#008584

Achromatopsia (no color)

#747474

Design tokens & code

CSS

--color: #257e91;
/* rgb */ color: rgb(37, 126, 145);
/* oklch */ color: oklch(55.0% 0.086 215.3);

Tailwind

colors: {
  custom: {
    50: '#70a3b1',
    500: '#257e91',
    950: '#000000',
  },
}

SCSS

$custom: #257e91;
$custom-light: #70a3b1;
$custom-dark: #000000;

JSON

{
  "hex": "#257e91",
  "rgb": {
    "r": 37,
    "g": 126,
    "b": 145
  },
  "hsl": {
    "h": 190.556,
    "s": 59.341,
    "l": 35.686
  },
  "oklch": {
    "l": 0.55024,
    "c": 0.08566,
    "h": 215.3
  },
  "luminance": 0.17359
}

Semantic roles & 50–950 ramp

primary

#257E91

secondary

#BA6958

accent

#6145E3

background

#F7FAFA

surface

#EDF4F5

border

#C8CECF

text

#090F10

muted

#7B7F7F

Preview Lab

Preview with #257E91

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

Preview Lab → · Contrast checker → · Palette generator →