#257DA4#257DA4

#257DA4 is a mid, moderate cyan. Relative luminance 0.177; OKLCH L 55.7% C 0.100 H 232.2°. Best body text is #FFFFFF at 4.62:1 contrast (WCAG AA passes).

Color values

HEX	#257DA4
RGB	rgb(37, 125, 164)
HSL	hsl(198, 63%, 39%)
HSV	hsv(198, 77%, 64%)
CMYK	cmyk(77.4%, 23.8%, 0%, 35.7%)
CIE-LAB	lab(49.18, -11.98, -28.14)
CIE-LCH	lch(49.18, 30.58, 246.94°)
OKLab	oklab(55.66% -0.0614 -0.0792)
OKLCH	oklch(55.66% 0.1 232.2)
XYZ	xyz(14.7947, 17.7391, 37.7590)
Luminance	0.1774 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#257DA4 #A44C25

analogous

#25A48C #257DA4 #253EA4

triadic

#257DA4 #A4257D #7DA425

tetradic

#257DA4 #8C25A4 #A44C25 #3EA425

square

#257DA4 #8C25A4 #A44C25 #3EA425

split-complementary

#257DA4 #A4253E #A48C25

monochromatic

#0E3140 #1A5772 #257DA4 #35A1D1 #67B8DD

Accessibility & contrast

On white

4.62

#257DA4 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.55

#257DA4 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#FFFFFF on #257DA4

4.62:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##257DA4	#FFFFFF	#000000	##FFFFFF
##257DA4	1.00	4.62	4.55	4.62
#FFFFFF	4.62	1.00	21.00	1.00
#000000	4.55	21.00	1.00	21.00
##FFFFFF	4.62	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#697CA6

Deuteranopia (green-blind)

#5870A3

Tritanopia (blue-blind)

#00878A

Achromatopsia (no color)

#757575

Design tokens & code

CSS

--color: #257da4;
/* rgb */ color: rgb(37, 125, 164);
/* oklch */ color: oklch(55.7% 0.100 232.2);

Tailwind

colors: {
  custom: {
    50: '#73a2bf',
    500: '#257da4',
    950: '#000000',
  },
}

SCSS

$custom: #257da4;
$custom-light: #73a2bf;
$custom-dark: #000000;

JSON

{
  "hex": "#257da4",
  "rgb": {
    "r": 37,
    "g": 125,
    "b": 164
  },
  "hsl": {
    "h": 198.425,
    "s": 63.184,
    "l": 39.412
  },
  "oklch": {
    "l": 0.5566,
    "c": 0.10024,
    "h": 232.2
  },
  "luminance": 0.17741
}

Semantic roles & 50–950 ramp

primary

#257DA4

secondary

#C28062

accent

#7442E6

background

#F7FAFB

surface

#EEF3F7

border

#C9CDD0

text

#090F12

muted

#7B7F81

Preview Lab

Preview with #257DA4

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

Preview Lab → · Contrast checker → · Palette generator →