#123A8F#123A8F

#123A8F is a dark, vivid blue. Relative luminance 0.051; OKLCH L 37.9% C 0.148 H 262.6°. Best body text is #FFFFFF at 10.36:1 contrast (WCAG AA passes).

Color values

HEX	#123A8F
RGB	rgb(18, 58, 143)
HSL	hsl(221, 78%, 32%)
HSV	hsv(221, 87%, 56%)
CMYK	cmyk(87.4%, 59.4%, 0%, 43.9%)
CIE-LAB	lab(27.12, 20.87, -50.71)
CIE-LCH	lch(27.12, 54.84, 292.37°)
OKLab	oklab(37.92% -0.019 -0.1466)
OKLCH	oklch(37.92% 0.148 262.6)
XYZ	xyz(6.7187, 5.1370, 26.6187)
Luminance	0.0514 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#123A8F #8F6712

analogous

#12798F #123A8F #29128F

triadic

#123A8F #8F123A #3A8F12

tetradic

#123A8F #8F1279 #8F6712 #128F29

square

#123A8F #8F1279 #8F6712 #128F29

split-complementary

#123A8F #8F2912 #798F12

monochromatic

#040E22 #0B2459 #123A8F #1950C5 #366EE6

Accessibility & contrast

On white

10.36

#123A8F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.03

#123A8F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #123A8F

10.36:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##123A8F	#FFFFFF	#000000	##FFFFFF
##123A8F	1.00	10.36	2.03	10.36
#FFFFFF	10.36	1.00	21.00	1.00
#000000	2.03	21.00	1.00	21.00
##FFFFFF	10.36	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004692

Deuteranopia (green-blind)

#003B8D

Tritanopia (blue-blind)

#00505E

Achromatopsia (no color)

#404040

Design tokens & code

CSS

--color: #123a8f;
/* rgb */ color: rgb(18, 58, 143);
/* oklch */ color: oklch(37.9% 0.148 262.6);

Tailwind

colors: {
  custom: {
    50: '#696fb1',
    500: '#123a8f',
    950: '#000000',
  },
}

SCSS

$custom: #123a8f;
$custom-light: #696fb1;
$custom-dark: #000000;

JSON

{
  "hex": "#123a8f",
  "rgb": {
    "r": 18,
    "g": 58,
    "b": 143
  },
  "hsl": {
    "h": 220.8,
    "s": 77.64,
    "l": 31.569
  },
  "oklch": {
    "l": 0.37921,
    "c": 0.14787,
    "h": 262.6
  },
  "luminance": 0.05138
}

Semantic roles & 50–950 ramp

primary

#123A8F

secondary

#C3973A

accent

#B734F4

background

#F6F6FB

surface

#ECECF6

border

#C7C7D0

text

#080711

muted

#7A7A80

Preview Lab

Preview with #123A8F

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

Preview Lab → · Contrast checker → · Palette generator →