#3F90B3#3F90B3

#3F90B3 is a mid, moderate cyan. Relative luminance 0.243; OKLCH L 61.8% C 0.094 H 229.5°. Best body text is #000000 at 5.85:1 contrast (WCAG AA passes).

Color values

HEX	#3F90B3
RGB	rgb(63, 144, 179)
HSL	hsl(198, 48%, 47%)
HSV	hsv(198, 65%, 70%)
CMYK	cmyk(64.8%, 19.6%, 0%, 29.8%)
CIE-LAB	lab(56.34, -13.65, -25.62)
CIE-LCH	lch(56.34, 29.03, 241.95°)
OKLab	oklab(61.79% -0.0612 -0.0717)
OKLCH	oklch(61.79% 0.094 229.5)
XYZ	xyz(20.1566, 24.2559, 46.2587)
Luminance	0.2426 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F90B3 #B3623F

analogous

#3FB39C #3F90B3 #3F56B3

triadic

#3F90B3 #B33F90 #90B33F

tetradic

#3F90B3 #9C3FB3 #B3623F #56B33F

square

#3F90B3 #9C3FB3 #B3623F #56B33F

split-complementary

#3F90B3 #B33F56 #B39C3F

monochromatic

#1F4758 #2F6C86 #3F90B3 #66ABC9 #93C4D9

Accessibility & contrast

On white

3.59

#3F90B3 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.85

#3F90B3 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3F90B3

5.85:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F90B3	#FFFFFF	#000000	##000000
##3F90B3	1.00	3.59	5.85	5.85
#FFFFFF	3.59	1.00	21.00	21.00
#000000	5.85	21.00	1.00	1.00
##000000	5.85	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#7E8EB5

Deuteranopia (green-blind)

#6E82B3

Tritanopia (blue-blind)

#009A9B

Achromatopsia (no color)

#878787

Design tokens & code

CSS

--color: #3f90b3;
/* rgb */ color: rgb(63, 144, 179);
/* oklch */ color: oklch(61.8% 0.094 229.5);

Tailwind

colors: {
  custom: {
    50: '#80b0c9',
    500: '#3f90b3',
    950: '#000000',
  },
}

SCSS

$custom: #3f90b3;
$custom-light: #80b0c9;
$custom-dark: #000000;

JSON

{
  "hex": "#3f90b3",
  "rgb": {
    "r": 63,
    "g": 144,
    "b": 179
  },
  "hsl": {
    "h": 198.103,
    "s": 47.934,
    "l": 47.451
  },
  "oklch": {
    "l": 0.6179,
    "c": 0.09427,
    "h": 229.5
  },
  "luminance": 0.24258
}

Semantic roles & 50–950 ramp

primary

#3F90B3

secondary

#C49B89

accent

#7950D8

background

#F8FAFC

surface

#EFF4F8

border

#CACED1

text

#0B1013

muted

#7C7F82

Preview Lab

Preview with #3F90B3

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

Preview Lab → · Contrast checker → · Palette generator →