#183FA0#183FA0

#183FA0 is a dark, vivid blue. Relative luminance 0.063; OKLCH L 40.7% C 0.163 H 263.9°. Best body text is #FFFFFF at 9.30:1 contrast (WCAG AA passes).

Color values

HEX	#183FA0
RGB	rgb(24, 63, 160)
HSL	hsl(223, 74%, 36%)
HSV	hsv(223, 85%, 63%)
CMYK	cmyk(85%, 60.6%, 0%, 37.3%)
CIE-LAB	lab(30.12, 24.76, -56.19)
CIE-LCH	lch(30.12, 61.40, 293.78°)
OKLab	oklab(40.67% -0.0175 -0.1625)
OKLCH	oklch(40.67% 0.163 263.9)
XYZ	xyz(8.4971, 6.2862, 34.0164)
Luminance	0.0629 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183FA0 #A07918

analogous

#1883A0 #183FA0 #3518A0

triadic

#183FA0 #A0183F #3FA018

tetradic

#183FA0 #A01883 #A07918 #18A035

square

#183FA0 #A01883 #A07918 #18A035

split-complementary

#183FA0 #A03518 #83A018

monochromatic

#081536 #102A6B #183FA0 #2054D5 #4E79E4

Accessibility & contrast

On white

9.30

#183FA0 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.26

#183FA0 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183FA0

9.30:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183FA0	#FFFFFF	#000000	##FFFFFF
##183FA0	1.00	9.30	2.26	9.30
#FFFFFF	9.30	1.00	21.00	1.00
#000000	2.26	21.00	1.00	21.00
##FFFFFF	9.30	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004DA3

Deuteranopia (green-blind)

#00419E

Tritanopia (blue-blind)

#005869

Achromatopsia (no color)

#474747

Design tokens & code

CSS

--color: #183fa0;
/* rgb */ color: rgb(24, 63, 160);
/* oklch */ color: oklch(40.7% 0.163 263.9);

Tailwind

colors: {
  custom: {
    50: '#6f73bd',
    500: '#183fa0',
    950: '#000000',
  },
}

SCSS

$custom: #183fa0;
$custom-light: #6f73bd;
$custom-dark: #000000;

JSON

{
  "hex": "#183fa0",
  "rgb": {
    "r": 24,
    "g": 63,
    "b": 160
  },
  "hsl": {
    "h": 222.794,
    "s": 73.913,
    "l": 36.078
  },
  "oklch": {
    "l": 0.40671,
    "c": 0.16349,
    "h": 263.9
  },
  "luminance": 0.06287
}

Semantic roles & 50–950 ramp

primary

#183FA0

secondary

#C6A44D

accent

#BB37F1

background

#F7F6FB

surface

#EDECF7

border

#C8C7D0

text

#090812

muted

#7B7B81

Preview Lab

Preview with #183FA0

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

Preview Lab → · Contrast checker → · Palette generator →