#183F7E#183F7E

#183F7E is a dark, moderate blue. Relative luminance 0.053; OKLCH L 37.8% C 0.116 H 259.7°. Best body text is #FFFFFF at 10.24:1 contrast (WCAG AA passes).

Color values

HEX	#183F7E
RGB	rgb(24, 63, 126)
HSL	hsl(217, 68%, 29%)
HSV	hsv(217, 81%, 49%)
CMYK	cmyk(81%, 50%, 0%, 50.6%)
CIE-LAB	lab(27.45, 10.90, -39.60)
CIE-LCH	lch(27.45, 41.07, 285.39°)
OKLab	oklab(37.8% -0.0207 -0.1138)
OKLCH	oklch(37.8% 0.116 259.7)
XYZ	xyz(5.9187, 5.2549, 20.4370)
Luminance	0.0526 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183F7E #7E5718

analogous

#18727E #183F7E #24187E

triadic

#183F7E #7E183F #3F7E18

tetradic

#183F7E #7E1872 #7E5718 #187E24

square

#183F7E #7E1872 #7E5718 #187E24

split-complementary

#183F7E #7E2418 #727E18

monochromatic

#050D1A #0E254B #183F7E #2259B1 #3775D9

Accessibility & contrast

On white

10.24

#183F7E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.05

#183F7E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183F7E

10.24:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183F7E	#FFFFFF	#000000	##FFFFFF
##183F7E	1.00	10.24	2.05	10.24
#FFFFFF	10.24	1.00	21.00	1.00
#000000	2.05	21.00	1.00	21.00
##FFFFFF	10.24	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1B4680

Deuteranopia (green-blind)

#003C7D

Tritanopia (blue-blind)

#004E58

Achromatopsia (no color)

#414141

Design tokens & code

CSS

--color: #183f7e;
/* rgb */ color: rgb(24, 63, 126);
/* oklch */ color: oklch(37.8% 0.116 259.7);

Tailwind

colors: {
  custom: {
    50: '#6673a4',
    500: '#183f7e',
    950: '#000000',
  },
}

SCSS

$custom: #183f7e;
$custom-light: #6673a4;
$custom-dark: #000000;

JSON

{
  "hex": "#183f7e",
  "rgb": {
    "r": 24,
    "g": 63,
    "b": 126
  },
  "hsl": {
    "h": 217.059,
    "s": 68,
    "l": 29.412
  },
  "oklch": {
    "l": 0.37803,
    "c": 0.11567,
    "h": 259.7
  },
  "luminance": 0.05256
}

Semantic roles & 50–950 ramp

primary

#183F7E

secondary

#B2863F

accent

#A83DEB

background

#F6F6FA

surface

#EBECF4

border

#C6C7CE

text

#07080F

muted

#7A7B7F

Preview Lab

Preview with #183F7E

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

Preview Lab → · Contrast checker → · Palette generator →