#1F387B#1F387B

#1F387B is a dark, moderate blue. Relative luminance 0.045; OKLCH L 36.3% C 0.118 H 265.4°. Best body text is #FFFFFF at 10.99:1 contrast (WCAG AA passes).

Color values

HEX	#1F387B
RGB	rgb(31, 56, 123)
HSL	hsl(224, 60%, 30%)
HSV	hsv(224, 75%, 48%)
CMYK	cmyk(74.8%, 54.5%, 0%, 51.8%)
CIE-LAB	lab(25.41, 15.53, -40.99)
CIE-LCH	lch(25.41, 43.83, 290.74°)
OKLab	oklab(36.25% -0.0094 -0.1179)
OKLCH	oklch(36.25% 0.118 265.4)
XYZ	xyz(5.5531, 4.5491, 19.3205)
Luminance	0.0455 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F387B #7B621F

analogous

#1F667B #1F387B #341F7B

triadic

#1F387B #7B1F38 #387B1F

tetradic

#1F387B #7B1F66 #7B621F #1F7B34

square

#1F387B #7B1F66 #7B621F #1F7B34

split-complementary

#1F387B #7B341F #667B1F

monochromatic

#060B19 #13224A #1F387B #2B4EAC #446AD0

Accessibility & contrast

On white

10.99

#1F387B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.91

#1F387B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F387B

10.99:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F387B	#FFFFFF	#000000	##FFFFFF
##1F387B	1.00	10.99	1.91	10.99
#FFFFFF	10.99	1.00	21.00	1.00
#000000	1.91	21.00	1.00	21.00
##FFFFFF	10.99	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0A417D

Deuteranopia (green-blind)

#00387A

Tritanopia (blue-blind)

#004854

Achromatopsia (no color)

#3C3C3C

Design tokens & code

CSS

--color: #1f387b;
/* rgb */ color: rgb(31, 56, 123);
/* oklch */ color: oklch(36.3% 0.118 265.4);

Tailwind

colors: {
  custom: {
    50: '#686ea2',
    500: '#1f387b',
    950: '#000000',
  },
}

SCSS

$custom: #1f387b;
$custom-light: #686ea2;
$custom-dark: #000000;

JSON

{
  "hex": "#1f387b",
  "rgb": {
    "r": 31,
    "g": 56,
    "b": 123
  },
  "hsl": {
    "h": 223.696,
    "s": 59.74,
    "l": 30.196
  },
  "oklch": {
    "l": 0.36255,
    "c": 0.1183,
    "h": 265.4
  },
  "luminance": 0.0455
}

Semantic roles & 50–950 ramp

primary

#1F387B

secondary

#AE9248

accent

#B845E3

background

#F6F6FA

surface

#EBEBF3

border

#C6C6CD

text

#07070F

muted

#7A7A7F

Preview Lab

Preview with #1F387B

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

Preview Lab → · Contrast checker → · Palette generator →