#257EC4#257EC4

#257EC4 is a mid, vivid cyan. Relative luminance 0.193; OKLCH L 57.6% C 0.135 H 247.3°. Best body text is #000000 at 4.86:1 contrast (WCAG AA passes).

Color values

HEX	#257EC4
RGB	rgb(37, 126, 196)
HSL	hsl(206, 68%, 46%)
HSV	hsv(206, 81%, 77%)
CMYK	cmyk(81.1%, 35.7%, 0%, 23.1%)
CIE-LAB	lab(51.03, -0.84, -43.69)
CIE-LCH	lch(51.03, 43.69, 268.90°)
OKLab	oklab(57.64% -0.0522 -0.1244)
OKLCH	oklch(57.64% 0.135 247.3)
XYZ	xyz(18.1838, 19.2983, 54.9804)
Luminance	0.1930 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#257EC4 #C46B25

analogous

#25C4BA #257EC4 #252FC4

triadic

#257EC4 #C4257E #7EC425

tetradic

#257EC4 #BA25C4 #C46B25 #2FC425

square

#257EC4 #BA25C4 #C46B25 #2FC425

split-complementary

#257EC4 #C4252F #C4BA25

monochromatic

#123C5D #1B5D91 #257EC4 #499CDD #7DB8E6

Accessibility & contrast

On white

4.32

#257EC4 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.86

#257EC4 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #257EC4

4.86:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##257EC4	#FFFFFF	#000000	##000000
##257EC4	1.00	4.32	4.86	4.86
#FFFFFF	4.32	1.00	21.00	21.00
#000000	4.86	21.00	1.00	1.00
##000000	4.86	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5D81C7

Deuteranopia (green-blind)

#4673C3

Tritanopia (blue-blind)

#008F98

Achromatopsia (no color)

#7A7A7A

Design tokens & code

CSS

--color: #257ec4;
/* rgb */ color: rgb(37, 126, 196);
/* oklch */ color: oklch(57.6% 0.135 247.3);

Tailwind

colors: {
  custom: {
    50: '#79a3d6',
    500: '#257ec4',
    950: '#000000',
  },
}

SCSS

$custom: #257ec4;
$custom-light: #79a3d6;
$custom-dark: #000000;

JSON

{
  "hex": "#257ec4",
  "rgb": {
    "r": 37,
    "g": 126,
    "b": 196
  },
  "hsl": {
    "h": 206.415,
    "s": 68.24,
    "l": 45.686
  },
  "oklch": {
    "l": 0.5764,
    "c": 0.13494,
    "h": 247.3
  },
  "luminance": 0.19301
}

Semantic roles & 50–950 ramp

primary

#257EC4

secondary

#CF9D76

accent

#893DEB

background

#F8F9FD

surface

#EFF2FA

border

#CACCD3

text

#0B0F14

muted

#7C7E83

Preview Lab

Preview with #257EC4

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

Preview Lab → · Contrast checker → · Palette generator →