#3973BC#3973BC

#3973BC is a mid, vivid cyan. Relative luminance 0.168; OKLCH L 55.3% C 0.129 H 255.4°. Best body text is #FFFFFF at 4.82:1 contrast (WCAG AA passes).

Color values

HEX	#3973BC
RGB	rgb(57, 115, 188)
HSL	hsl(213, 53%, 48%)
HSV	hsv(213, 70%, 74%)
CMYK	cmyk(69.7%, 38.8%, 0%, 26.3%)
CIE-LAB	lab(47.96, 5.44, -43.94)
CIE-LCH	lch(47.96, 44.27, 277.06°)
OKLab	oklab(55.25% -0.0326 -0.1251)
OKLCH	oklch(55.25% 0.129 255.4)
XYZ	xyz(16.8919, 16.7604, 49.9121)
Luminance	0.1676 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3973BC #BC8239

analogous

#39B4BC #3973BC #4039BC

triadic

#3973BC #BC3973 #73BC39

tetradic

#3973BC #BC39B4 #BC8239 #39BC40

square

#3973BC #BC39B4 #BC8239 #39BC40

split-complementary

#3973BC #BC4039 #B4BC39

monochromatic

#1D3A5E #2B568D #3973BC #6393D0 #92B3DE

Accessibility & contrast

On white

4.82

#3973BC on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.35

#3973BC on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3973BC

4.82:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3973BC	#FFFFFF	#000000	##FFFFFF
##3973BC	1.00	4.82	4.35	4.82
#FFFFFF	4.82	1.00	21.00	1.00
#000000	4.35	21.00	1.00	21.00
##FFFFFF	4.82	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5278BF

Deuteranopia (green-blind)

#3E6CBB

Tritanopia (blue-blind)

#00848E

Achromatopsia (no color)

#727272

Design tokens & code

CSS

--color: #3973bc;
/* rgb */ color: rgb(57, 115, 188);
/* oklch */ color: oklch(55.3% 0.129 255.4);

Tailwind

colors: {
  custom: {
    50: '#7e9ad0',
    500: '#3973bc',
    950: '#000000',
  },
}

SCSS

$custom: #3973bc;
$custom-light: #7e9ad0;
$custom-dark: #000000;

JSON

{
  "hex": "#3973bc",
  "rgb": {
    "r": 57,
    "g": 115,
    "b": 188
  },
  "hsl": {
    "h": 213.435,
    "s": 53.469,
    "l": 48.039
  },
  "oklch": {
    "l": 0.55254,
    "c": 0.12932,
    "h": 255.4
  },
  "luminance": 0.16762
}

Semantic roles & 50–950 ramp

primary

#3973BC

secondary

#C9AC88

accent

#9C4BDD

background

#F8F9FC

surface

#EFF2F9

border

#CACCD2

text

#0B0E14

muted

#7C7E82

Preview Lab

Preview with #3973BC

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

Preview Lab → · Contrast checker → · Palette generator →