#3F498E#3F498E

#3F498E is a dark, moderate blue. Relative luminance 0.078; OKLCH L 43.3% C 0.113 H 274.5°. Best body text is #FFFFFF at 8.22:1 contrast (WCAG AA passes).

Color values

HEX	#3F498E
RGB	rgb(63, 73, 142)
HSL	hsl(232, 39%, 40%)
HSV	hsv(232, 56%, 56%)
CMYK	cmyk(55.6%, 48.6%, 0%, 44.3%)
CIE-LAB	lab(33.51, 17.11, -39.66)
CIE-LCH	lch(33.51, 43.20, 293.34°)
OKLab	oklab(43.33% 0.0088 -0.113)
OKLCH	oklch(43.33% 0.113 274.5)
XYZ	xyz(9.3134, 7.7742, 26.5957)
Luminance	0.0777 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F498E #8E843F

analogous

#3F708E #3F498E #5C3F8E

triadic

#3F498E #8E3F49 #498E3F

tetradic

#3F498E #8E3F70 #8E843F #3F8E5C

square

#3F498E #8E3F70 #8E843F #3F8E5C

split-complementary

#3F498E #8E5C3F #708E3F

monochromatic

#191D39 #2C3364 #3F498E #5662B4 #8189C7

Accessibility & contrast

On white

8.22

#3F498E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.55

#3F498E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3F498E

8.22:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F498E	#FFFFFF	#000000	##FFFFFF
##3F498E	1.00	8.22	2.55	8.22
#FFFFFF	8.22	1.00	21.00	1.00
#000000	2.55	21.00	1.00	21.00
##FFFFFF	8.22	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#295291

Deuteranopia (green-blind)

#1F4C8D

Tritanopia (blue-blind)

#185864

Achromatopsia (no color)

#4F4F4F

Design tokens & code

CSS

--color: #3f498e;
/* rgb */ color: rgb(63, 73, 142);
/* oklch */ color: oklch(43.3% 0.113 274.5);

Tailwind

colors: {
  custom: {
    50: '#7a7baf',
    500: '#3f498e',
    950: '#000000',
  },
}

SCSS

$custom: #3f498e;
$custom-light: #7a7baf;
$custom-dark: #000000;

JSON

{
  "hex": "#3f498e",
  "rgb": {
    "r": 63,
    "g": 73,
    "b": 142
  },
  "hsl": {
    "h": 232.405,
    "s": 38.537,
    "l": 40.196
  },
  "oklch": {
    "l": 0.43329,
    "c": 0.11337,
    "h": 274.5
  },
  "luminance": 0.07775
}

Semantic roles & 50–950 ramp

primary

#3F498E

secondary

#B1AA78

accent

#C059CE

background

#F7F7FA

surface

#EEEDF4

border

#C9C8CE

text

#0A0910

muted

#7C7B7F

Preview Lab

Preview with #3F498E

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

Preview Lab → · Contrast checker → · Palette generator →