#1F3E8B#1F3E8B

#1F3E8B is a dark, vivid blue. Relative luminance 0.056; OKLCH L 38.9% C 0.134 H 264.4°. Best body text is #FFFFFF at 9.90:1 contrast (WCAG AA passes).

Color values

HEX	#1F3E8B
RGB	rgb(31, 62, 139)
HSL	hsl(223, 64%, 33%)
HSV	hsv(223, 78%, 55%)
CMYK	cmyk(77.7%, 55.4%, 0%, 45.5%)
CIE-LAB	lab(28.38, 17.75, -46.17)
CIE-LCH	lch(28.38, 49.47, 291.03°)
OKLab	oklab(38.89% -0.013 -0.133)
OKLCH	oklch(38.89% 0.134 264.4)
XYZ	xyz(6.9462, 5.5999, 25.1359)
Luminance	0.0560 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F3E8B #8B6C1F

analogous

#1F748B #1F3E8B #361F8B

triadic

#1F3E8B #8B1F3E #3E8B1F

tetradic

#1F3E8B #8B1F74 #8B6C1F #1F8B36

square

#1F3E8B #8B1F74 #8B6C1F #1F8B36

split-complementary

#1F3E8B #8B361F #748B1F

monochromatic

#091127 #142859 #1F3E8B #2A54BD #4D75D7

Accessibility & contrast

On white

9.90

#1F3E8B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.12

#1F3E8B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F3E8B

9.90:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F3E8B	#FFFFFF	#000000	##FFFFFF
##1F3E8B	1.00	9.90	2.12	9.90
#FFFFFF	9.90	1.00	21.00	1.00
#000000	2.12	21.00	1.00	21.00
##FFFFFF	9.90	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00488E

Deuteranopia (green-blind)

#003E89

Tritanopia (blue-blind)

#00515E

Achromatopsia (no color)

#434343

Design tokens & code

CSS

--color: #1f3e8b;
/* rgb */ color: rgb(31, 62, 139);
/* oklch */ color: oklch(38.9% 0.134 264.4);

Tailwind

colors: {
  custom: {
    50: '#6c72ad',
    500: '#1f3e8b',
    950: '#000000',
  },
}

SCSS

$custom: #1f3e8b;
$custom-light: #6c72ad;
$custom-dark: #000000;

JSON

{
  "hex": "#1f3e8b",
  "rgb": {
    "r": 31,
    "g": 62,
    "b": 139
  },
  "hsl": {
    "h": 222.778,
    "s": 63.529,
    "l": 33.333
  },
  "oklch": {
    "l": 0.38893,
    "c": 0.13368,
    "h": 264.4
  },
  "luminance": 0.05601
}

Semantic roles & 50–950 ramp

primary

#1F3E8B

secondary

#BA9A4C

accent

#B741E7

background

#F6F6FA

surface

#ECECF4

border

#C7C7CE

text

#080810

muted

#7A7B7F

Preview Lab

Preview with #1F3E8B

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

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