#397FCB#397FCB

#397FCB is a mid, vivid cyan. Relative luminance 0.204; OKLCH L 58.9% C 0.136 H 252.8°. Best body text is #000000 at 5.07:1 contrast (WCAG AA passes).

Color values

HEX	#397FCB
RGB	rgb(57, 127, 203)
HSL	hsl(211, 58%, 51%)
HSV	hsv(211, 72%, 80%)
CMYK	cmyk(71.9%, 37.4%, 0%, 20.4%)
CIE-LAB	lab(52.24, 3.52, -45.73)
CIE-LCH	lch(52.24, 45.86, 274.40°)
OKLab	oklab(58.86% -0.0404 -0.1302)
OKLCH	oklch(58.86% 0.136 252.8)
XYZ	xyz(20.0522, 20.3582, 59.3611)
Luminance	0.2036 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#397FCB #CB8539

analogous

#39C8CB #397FCB #3C39CB

triadic

#397FCB #CB397F #7FCB39

tetradic

#397FCB #CB39C8 #CB8539 #39CB3C

square

#397FCB #CB39C8 #CB8539 #39CB3C

split-complementary

#397FCB #CB3C39 #C8CB39

monochromatic

#1D436D #29619D #397FCB #699ED8 #9ABEE4

Accessibility & contrast

On white

4.14

#397FCB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.07

#397FCB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #397FCB

5.07:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##397FCB	#FFFFFF	#000000	##000000
##397FCB	1.00	4.14	5.07	5.07
#FFFFFF	4.14	1.00	21.00	21.00
#000000	5.07	21.00	1.00	1.00
##000000	5.07	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5C84CE

Deuteranopia (green-blind)

#4676C9

Tritanopia (blue-blind)

#00919B

Achromatopsia (no color)

#7D7D7D

Design tokens & code

CSS

--color: #397fcb;
/* rgb */ color: rgb(57, 127, 203);
/* oklch */ color: oklch(58.9% 0.136 252.8);

Tailwind

colors: {
  custom: {
    50: '#81a3db',
    500: '#397fcb',
    950: '#000000',
  },
}

SCSS

$custom: #397fcb;
$custom-light: #81a3db;
$custom-dark: #000000;

JSON

{
  "hex": "#397fcb",
  "rgb": {
    "r": 57,
    "g": 127,
    "b": 203
  },
  "hsl": {
    "h": 211.233,
    "s": 58.4,
    "l": 50.98
  },
  "oklch": {
    "l": 0.5886,
    "c": 0.13634,
    "h": 252.8
  },
  "luminance": 0.2036
}

Semantic roles & 50–950 ramp

primary

#397FCB

secondary

#D0B190

accent

#9746E2

background

#F8FAFD

surface

#F0F3FB

border

#CBCDD4

text

#0C0F15

muted

#7D7F83

Preview Lab

Preview with #397FCB

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

Preview Lab → · Contrast checker → · Palette generator →