#397BCB#397BCB

#397BCB is a mid, vivid cyan. Relative luminance 0.193; OKLCH L 58.0% C 0.141 H 254.9°. Best body text is #000000 at 4.87:1 contrast (WCAG AA passes).

Color values

HEX	#397BCB
RGB	rgb(57, 123, 203)
HSL	hsl(213, 58%, 51%)
HSV	hsv(213, 72%, 80%)
CMYK	cmyk(71.9%, 39.4%, 0%, 20.4%)
CIE-LAB	lab(51.09, 5.95, -47.56)
CIE-LCH	lch(51.09, 47.93, 277.13°)
OKLab	oklab(57.96% -0.0367 -0.1356)
OKLCH	oklch(57.96% 0.141 254.9)
XYZ	xyz(19.5458, 19.3454, 59.1923)
Luminance	0.1935 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#397BCB #CB8939

analogous

#39C4CB #397BCB #4039CB

triadic

#397BCB #CB397B #7BCB39

tetradic

#397BCB #CB39C4 #CB8939 #39CB40

square

#397BCB #CB39C4 #CB8939 #39CB40

split-complementary

#397BCB #CB4039 #C4CB39

monochromatic

#1D416D #295E9D #397BCB #699BD8 #9ABCE4

Accessibility & contrast

On white

4.31

#397BCB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.87

#397BCB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #397BCB

4.87:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##397BCB	#FFFFFF	#000000	##000000
##397BCB	1.00	4.31	4.87	4.87
#FFFFFF	4.31	1.00	21.00	21.00
#000000	4.87	21.00	1.00	1.00
##000000	4.87	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5681CE

Deuteranopia (green-blind)

#3F73C9

Tritanopia (blue-blind)

#008E99

Achromatopsia (no color)

#7A7A7A

Design tokens & code

CSS

--color: #397bcb;
/* rgb */ color: rgb(57, 123, 203);
/* oklch */ color: oklch(58.0% 0.141 254.9);

Tailwind

colors: {
  custom: {
    50: '#81a0db',
    500: '#397bcb',
    950: '#000000',
  },
}

SCSS

$custom: #397bcb;
$custom-light: #81a0db;
$custom-dark: #000000;

JSON

{
  "hex": "#397bcb",
  "rgb": {
    "r": 57,
    "g": 123,
    "b": 203
  },
  "hsl": {
    "h": 212.877,
    "s": 58.4,
    "l": 50.98
  },
  "oklch": {
    "l": 0.57962,
    "c": 0.14051,
    "h": 254.9
  },
  "luminance": 0.19348
}

Semantic roles & 50–950 ramp

primary

#397BCB

secondary

#D0B390

accent

#9B46E2

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0E15

muted

#7D7E83

Preview Lab

Preview with #397BCB

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

Preview Lab → · Contrast checker → · Palette generator →