#1B3F7D#1B3F7D

#1B3F7D is a dark, moderate blue. Relative luminance 0.053; OKLCH L 37.8% C 0.113 H 260.5°. Best body text is #FFFFFF at 10.22:1 contrast (WCAG AA passes).

Color values

HEX	#1B3F7D
RGB	rgb(27, 63, 125)
HSL	hsl(218, 64%, 30%)
HSV	hsv(218, 78%, 49%)
CMYK	cmyk(78.4%, 49.6%, 0%, 51%)
CIE-LAB	lab(27.48, 10.87, -38.91)
CIE-LCH	lch(27.48, 40.40, 285.61°)
OKLab	oklab(37.84% -0.0187 -0.1117)
OKLCH	oklch(37.84% 0.113 260.5)
XYZ	xyz(5.9298, 5.2680, 20.1024)
Luminance	0.0527 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B3F7D #7D591B

analogous

#1B707D #1B3F7D #281B7D

triadic

#1B3F7D #7D1B3F #3F7D1B

tetradic

#1B3F7D #7D1B70 #7D591B #1B7D28

square

#1B3F7D #7D1B70 #7D591B #1B7D28

split-complementary

#1B3F7D #7D281B #707D1B

monochromatic

#050D19 #10264B #1B3F7D #2658AF #3D75D5

Accessibility & contrast

On white

10.22

#1B3F7D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.05

#1B3F7D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B3F7D

10.22:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B3F7D	#FFFFFF	#000000	##FFFFFF
##1B3F7D	1.00	10.22	2.05	10.22
#FFFFFF	10.22	1.00	21.00	1.00
#000000	2.05	21.00	1.00	21.00
##FFFFFF	10.22	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1D467F

Deuteranopia (green-blind)

#003D7C

Tritanopia (blue-blind)

#004E58

Achromatopsia (no color)

#414141

Design tokens & code

CSS

--color: #1b3f7d;
/* rgb */ color: rgb(27, 63, 125);
/* oklch */ color: oklch(37.8% 0.113 260.5);

Tailwind

colors: {
  custom: {
    50: '#6773a3',
    500: '#1b3f7d',
    950: '#000000',
  },
}

SCSS

$custom: #1b3f7d;
$custom-light: #6773a3;
$custom-dark: #000000;

JSON

{
  "hex": "#1b3f7d",
  "rgb": {
    "r": 27,
    "g": 63,
    "b": 125
  },
  "hsl": {
    "h": 217.959,
    "s": 64.474,
    "l": 29.804
  },
  "oklch": {
    "l": 0.37838,
    "c": 0.11329,
    "h": 260.5
  },
  "luminance": 0.05269
}

Semantic roles & 50–950 ramp

primary

#1B3F7D

secondary

#B18843

accent

#AA40E7

background

#F6F6FA

surface

#EBECF4

border

#C6C7CE

text

#07080F

muted

#7A7B7F

Preview Lab

Preview with #1B3F7D

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

Preview Lab → · Contrast checker → · Palette generator →