#3F91B0#3F91B0

#3F91B0 is a mid, moderate cyan. Relative luminance 0.244; OKLCH L 61.9% C 0.092 H 226.1°. Best body text is #000000 at 5.89:1 contrast (WCAG AA passes).

Color values

HEX	#3F91B0
RGB	rgb(63, 145, 176)
HSL	hsl(196, 47%, 47%)
HSV	hsv(196, 64%, 69%)
CMYK	cmyk(64.2%, 17.6%, 0%, 31%)
CIE-LAB	lab(56.53, -15.17, -23.63)
CIE-LCH	lch(56.53, 28.08, 237.30°)
OKLab	oklab(61.9% -0.0635 -0.066)
OKLCH	oklch(61.9% 0.092 226.1)
XYZ	xyz(20.0087, 24.4401, 44.7288)
Luminance	0.2444 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F91B0 #B05E3F

analogous

#3FB097 #3F91B0 #3F59B0

triadic

#3F91B0 #B03F91 #91B03F

tetradic

#3F91B0 #973FB0 #B05E3F #59B03F

square

#3F91B0 #973FB0 #B05E3F #59B03F

split-complementary

#3F91B0 #B03F59 #B0973F

monochromatic

#1F4756 #2F6C83 #3F91B0 #65ACC8 #92C5D8

Accessibility & contrast

On white

3.57

#3F91B0 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.89

#3F91B0 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3F91B0

5.89:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F91B0	#FFFFFF	#000000	##000000
##3F91B0	1.00	3.57	5.89	5.89
#FFFFFF	3.57	1.00	21.00	21.00
#000000	5.89	21.00	1.00	1.00
##000000	5.89	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#808EB2

Deuteranopia (green-blind)

#7082B0

Tritanopia (blue-blind)

#009A9B

Achromatopsia (no color)

#888888

Design tokens & code

CSS

--color: #3f91b0;
/* rgb */ color: rgb(63, 145, 176);
/* oklch */ color: oklch(61.9% 0.092 226.1);

Tailwind

colors: {
  custom: {
    50: '#80b1c7',
    500: '#3f91b0',
    950: '#000000',
  },
}

SCSS

$custom: #3f91b0;
$custom-light: #80b1c7;
$custom-dark: #000000;

JSON

{
  "hex": "#3f91b0",
  "rgb": {
    "r": 63,
    "g": 145,
    "b": 176
  },
  "hsl": {
    "h": 196.46,
    "s": 47.28,
    "l": 46.863
  },
  "oklch": {
    "l": 0.61896,
    "c": 0.09154,
    "h": 226.1
  },
  "luminance": 0.24442
}

Semantic roles & 50–950 ramp

primary

#3F91B0

secondary

#C39888

accent

#7651D7

background

#F8FAFC

surface

#EFF5F8

border

#CACFD1

text

#0B1013

muted

#7C7F82

Preview Lab

Preview with #3F91B0

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

Preview Lab → · Contrast checker → · Palette generator →