#1F388C#1F388C

#1F388C is a dark, vivid blue. Relative luminance 0.050; OKLCH L 37.7% C 0.143 H 266.7°. Best body text is #FFFFFF at 10.49:1 contrast (WCAG AA passes).

Color values

HEX	#1F388C
RGB	rgb(31, 56, 140)
HSL	hsl(226, 64%, 34%)
HSV	hsv(226, 78%, 55%)
CMYK	cmyk(77.9%, 60%, 0%, 45.1%)
CIE-LAB	lab(26.77, 22.31, -49.41)
CIE-LCH	lch(26.77, 54.21, 294.30°)
OKLab	oklab(37.71% -0.0083 -0.1427)
OKLCH	oklch(37.71% 0.143 266.7)
XYZ	xyz(6.7112, 5.0124, 25.4196)
Luminance	0.0501 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F388C #8C731F

analogous

#1F6E8C #1F388C #3C1F8C

triadic

#1F388C #8C1F38 #388C1F

tetradic

#1F388C #8C1F6E #8C731F #1F8C3C

square

#1F388C #8C1F6E #8C731F #1F8C3C

split-complementary

#1F388C #8C3C1F #6E8C1F

monochromatic

#091028 #14245A #1F388C #2A4CBE #4E6DD8

Accessibility & contrast

On white

10.49

#1F388C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.00

#1F388C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F388C

10.49:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F388C	#FFFFFF	#000000	##FFFFFF
##1F388C	1.00	10.49	2.00	10.49
#FFFFFF	10.49	1.00	21.00	1.00
#000000	2.00	21.00	1.00	21.00
##FFFFFF	10.49	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00458F

Deuteranopia (green-blind)

#003A8A

Tritanopia (blue-blind)

#004D5C

Achromatopsia (no color)

#3F3F3F

Design tokens & code

CSS

--color: #1f388c;
/* rgb */ color: rgb(31, 56, 140);
/* oklch */ color: oklch(37.7% 0.143 266.7);

Tailwind

colors: {
  custom: {
    50: '#6c6eae',
    500: '#1f388c',
    950: '#000000',
  },
}

SCSS

$custom: #1f388c;
$custom-light: #6c6eae;
$custom-dark: #000000;

JSON

{
  "hex": "#1f388c",
  "rgb": {
    "r": 31,
    "g": 56,
    "b": 140
  },
  "hsl": {
    "h": 226.239,
    "s": 63.743,
    "l": 33.529
  },
  "oklch": {
    "l": 0.37707,
    "c": 0.1429,
    "h": 266.7
  },
  "luminance": 0.05013
}

Semantic roles & 50–950 ramp

primary

#1F388C

secondary

#BBA14C

accent

#C141E7

background

#F7F6FA

surface

#EDEBF4

border

#C8C6CE

text

#080710

muted

#7B7A7F

Preview Lab

Preview with #1F388C

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

Preview Lab → · Contrast checker → · Palette generator →