#257AB2#257AB2

#257AB2 is a mid, moderate cyan. Relative luminance 0.175; OKLCH L 55.7% C 0.117 H 242.6°. Best body text is #FFFFFF at 4.66:1 contrast (WCAG AA passes).

Color values

HEX	#257AB2
RGB	rgb(37, 122, 178)
HSL	hsl(204, 66%, 42%)
HSV	hsv(204, 79%, 70%)
CMYK	cmyk(79.2%, 31.5%, 0%, 30.2%)
CIE-LAB	lab(48.91, -5.14, -36.68)
CIE-LCH	lch(48.91, 37.04, 262.02°)
OKLab	oklab(55.67% -0.0538 -0.104)
OKLCH	oklch(55.67% 0.117 242.6)
XYZ	xyz(15.7552, 17.5248, 44.6631)
Luminance	0.1753 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#257AB2 #B25D25

analogous

#25B2A4 #257AB2 #2534B2

triadic

#257AB2 #B2257A #7AB225

tetradic

#257AB2 #A425B2 #B25D25 #34B225

square

#257AB2 #A425B2 #B25D25 #34B225

split-complementary

#257AB2 #B22534 #B2A425

monochromatic

#10354D #1A577F #257AB2 #3D9AD7 #70B4E1

Accessibility & contrast

On white

4.66

#257AB2 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.51

#257AB2 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#FFFFFF on #257AB2

4.66:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##257AB2	#FFFFFF	#000000	##FFFFFF
##257AB2	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)

#607BB4

Deuteranopia (green-blind)

#4C6EB1

Tritanopia (blue-blind)

#00888E

Achromatopsia (no color)

#747474

Design tokens & code

CSS

--color: #257ab2;
/* rgb */ color: rgb(37, 122, 178);
/* oklch */ color: oklch(55.7% 0.117 242.6);

Tailwind

colors: {
  custom: {
    50: '#76a0c9',
    500: '#257ab2',
    950: '#000000',
  },
}

SCSS

$custom: #257ab2;
$custom-light: #76a0c9;
$custom-dark: #000000;

JSON

{
  "hex": "#257ab2",
  "rgb": {
    "r": 37,
    "g": 122,
    "b": 178
  },
  "hsl": {
    "h": 203.83,
    "s": 65.581,
    "l": 42.157
  },
  "oklch": {
    "l": 0.55666,
    "c": 0.11714,
    "h": 242.6
  },
  "luminance": 0.17527
}

Semantic roles & 50–950 ramp

primary

#257AB2

secondary

#C8906B

accent

#823FE9

background

#F7F9FC

surface

#EEF2F8

border

#C9CCD1

text

#0A0E13

muted

#7C7E82

Preview Lab

Preview with #257AB2

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

Preview Lab → · Contrast checker → · Palette generator →