#3975C9#3975C9

#3975C9 is a mid, vivid blue. Relative luminance 0.178; OKLCH L 56.5% C 0.144 H 257.4°. Best body text is #FFFFFF at 4.60:1 contrast (WCAG AA passes).

Color values

HEX	#3975C9
RGB	rgb(57, 117, 201)
HSL	hsl(215, 57%, 51%)
HSV	hsv(215, 72%, 79%)
CMYK	cmyk(71.6%, 41.8%, 0%, 21.2%)
CIE-LAB	lab(49.26, 8.92, -49.33)
CIE-LCH	lch(49.26, 50.13, 280.25°)
OKLab	oklab(56.51% -0.0316 -0.1409)
OKLCH	oklch(56.51% 0.144 257.4)
XYZ	xyz(18.5874, 17.8075, 57.7046)
Luminance	0.1781 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3975C9 #C98D39

analogous

#39BDC9 #3975C9 #4539C9

triadic

#3975C9 #C93975 #75C939

tetradic

#3975C9 #C939BD #C98D39 #39C945

square

#3975C9 #C939BD #C98D39 #39C945

split-complementary

#3975C9 #C94539 #BDC939

monochromatic

#1D3D6B #2A599B #3975C9 #6997D6 #99B8E3

Accessibility & contrast

On white

4.60

#3975C9 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.56

#3975C9 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#FFFFFF on #3975C9

4.60:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3975C9	#FFFFFF	#000000	##FFFFFF
##3975C9	1.00	4.60	4.56	4.60
#FFFFFF	4.60	1.00	21.00	1.00
#000000	4.56	21.00	1.00	21.00
##FFFFFF	4.60	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4D7CCC

Deuteranopia (green-blind)

#356FC7

Tritanopia (blue-blind)

#008995

Achromatopsia (no color)

#757575

Design tokens & code

CSS

--color: #3975c9;
/* rgb */ color: rgb(57, 117, 201);
/* oklch */ color: oklch(56.5% 0.144 257.4);

Tailwind

colors: {
  custom: {
    50: '#819cda',
    500: '#3975c9',
    950: '#000000',
  },
}

SCSS

$custom: #3975c9;
$custom-light: #819cda;
$custom-dark: #000000;

JSON

{
  "hex": "#3975c9",
  "rgb": {
    "r": 57,
    "g": 117,
    "b": 201
  },
  "hsl": {
    "h": 215,
    "s": 57.143,
    "l": 50.588
  },
  "oklch": {
    "l": 0.56505,
    "c": 0.14443,
    "h": 257.4
  },
  "luminance": 0.17809
}

Semantic roles & 50–950 ramp

primary

#3975C9

secondary

#CFB48F

accent

#A147E0

background

#F8F9FD

surface

#F0F2FB

border

#CBCCD4

text

#0C0E15

muted

#7D7E83

Preview Lab

Preview with #3975C9

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

Preview Lab → · Contrast checker → · Palette generator →