#183BA0#183BA0

#183BA0 is a dark, vivid blue. Relative luminance 0.059; OKLCH L 39.9% C 0.168 H 264.8°. Best body text is #FFFFFF at 9.67:1 contrast (WCAG AA passes).

Color values

HEX	#183BA0
RGB	rgb(24, 59, 160)
HSL	hsl(225, 74%, 36%)
HSV	hsv(225, 85%, 63%)
CMYK	cmyk(85%, 63.1%, 0%, 37.3%)
CIE-LAB	lab(29.05, 27.48, -57.93)
CIE-LCH	lch(29.05, 64.12, 295.38°)
OKLab	oklab(39.87% -0.0153 -0.1677)
OKLCH	oklch(39.87% 0.168 264.8)
XYZ	xyz(8.2836, 5.8592, 33.9452)
Luminance	0.0586 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183BA0 #A07D18

analogous

#187FA0 #183BA0 #3918A0

triadic

#183BA0 #A0183B #3BA018

tetradic

#183BA0 #A0187F #A07D18 #18A039

square

#183BA0 #A0187F #A07D18 #18A039

split-complementary

#183BA0 #A03918 #7FA018

monochromatic

#081436 #10276B #183BA0 #204FD5 #4E75E4

Accessibility & contrast

On white

9.67

#183BA0 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.17

#183BA0 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183BA0

9.67:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183BA0	#FFFFFF	#000000	##FFFFFF
##183BA0	1.00	9.67	2.17	9.67
#FFFFFF	9.67	1.00	21.00	1.00
#000000	2.17	21.00	1.00	21.00
##FFFFFF	9.67	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004BA3

Deuteranopia (green-blind)

#003E9E

Tritanopia (blue-blind)

#005568

Achromatopsia (no color)

#444444

Design tokens & code

CSS

--color: #183ba0;
/* rgb */ color: rgb(24, 59, 160);
/* oklch */ color: oklch(39.9% 0.168 264.8);

Tailwind

colors: {
  custom: {
    50: '#7070bd',
    500: '#183ba0',
    950: '#000000',
  },
}

SCSS

$custom: #183ba0;
$custom-light: #7070bd;
$custom-dark: #000000;

JSON

{
  "hex": "#183ba0",
  "rgb": {
    "r": 24,
    "g": 59,
    "b": 160
  },
  "hsl": {
    "h": 224.559,
    "s": 73.913,
    "l": 36.078
  },
  "oklch": {
    "l": 0.39874,
    "c": 0.16843,
    "h": 264.8
  },
  "luminance": 0.0586
}

Semantic roles & 50–950 ramp

primary

#183BA0

secondary

#C6A74D

accent

#C137F1

background

#F7F6FB

surface

#EDECF7

border

#C8C7D0

text

#090712

muted

#7B7A81

Preview Lab

Preview with #183BA0

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

Preview Lab → · Contrast checker → · Palette generator →