#257CA5#257CA5

#257CA5 is a mid, moderate cyan. Relative luminance 0.175; OKLCH L 55.5% C 0.102 H 233.8°. Best body text is #FFFFFF at 4.66:1 contrast (WCAG AA passes).

Color values

HEX	#257CA5
RGB	rgb(37, 124, 165)
HSL	hsl(199, 63%, 40%)
HSV	hsv(199, 78%, 65%)
CMYK	cmyk(77.6%, 24.8%, 0%, 35.3%)
CIE-LAB	lab(48.91, -11.05, -29.13)
CIE-LCH	lch(48.91, 31.16, 249.23°)
OKLab	oklab(55.46% -0.0601 -0.0821)
OKLCH	oklch(55.46% 0.102 233.8)
XYZ	xyz(14.7594, 17.5235, 38.1945)
Luminance	0.1752 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#257CA5 #A54E25

analogous

#25A58E #257CA5 #253CA5

triadic

#257CA5 #A5257C #7CA525

tetradic

#257CA5 #8E25A5 #A54E25 #3CA525

square

#257CA5 #8E25A5 #A54E25 #3CA525

split-complementary

#257CA5 #A5253C #A58E25

monochromatic

#0F3141 #1A5673 #257CA5 #35A0D2 #67B7DD

Accessibility & contrast

On white

4.66

#257CA5 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.51

#257CA5 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#FFFFFF on #257CA5

4.66:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##257CA5	#FFFFFF	#000000	##FFFFFF
##257CA5	1.00	4.66	4.51	4.66
#FFFFFF	4.66	1.00	21.00	1.00
#000000	4.51	21.00	1.00	21.00
##FFFFFF	4.66	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#687BA7

Deuteranopia (green-blind)

#576FA4

Tritanopia (blue-blind)

#00878A

Achromatopsia (no color)

#747474

Design tokens & code

CSS

--color: #257ca5;
/* rgb */ color: rgb(37, 124, 165);
/* oklch */ color: oklch(55.5% 0.102 233.8);

Tailwind

colors: {
  custom: {
    50: '#73a1c0',
    500: '#257ca5',
    950: '#000000',
  },
}

SCSS

$custom: #257ca5;
$custom-light: #73a1c0;
$custom-dark: #000000;

JSON

{
  "hex": "#257ca5",
  "rgb": {
    "r": 37,
    "g": 124,
    "b": 165
  },
  "hsl": {
    "h": 199.219,
    "s": 63.366,
    "l": 39.608
  },
  "oklch": {
    "l": 0.55463,
    "c": 0.10174,
    "h": 233.8
  },
  "luminance": 0.17525
}

Semantic roles & 50–950 ramp

primary

#257CA5

secondary

#C38263

accent

#7641E6

background

#F7F9FB

surface

#EEF2F7

border

#C9CCD0

text

#090F12

muted

#7B7E81

Preview Lab

Preview with #257CA5

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

Preview Lab → · Contrast checker → · Palette generator →